Core functions for plugin management, URLs, lifecycle hooks, and utilities.<\/p>
plugin_basename( $file )<\/code><\/h3>Extracts the plugin’s relative path from its absolute file path.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$basename = plugin_basename( __FILE__ );\n\/\/ Returns: 'your-plugin\/your-plugin.php'\n\n\/\/ Single-file plugin in plugins root\n$basename = plugin_basename( '\/var\/www\/html\/wp-content\/plugins\/hello.php' );\n\/\/ Returns: 'hello.php'<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Absolute path to plugin file<\/li><\/ul>Returns:<\/strong> (string) – Plugin path relative to plugins directory<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_path( $file )<\/code><\/h3>Gets the filesystem directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$path = plugin_dir_path( __FILE__ );\n\/\/ Returns: '\/var\/www\/html\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for includes\nrequire_once plugin_dir_path( __FILE__ ) . 'includes\/class-loader.php';<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – Directory path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_url( $file )<\/code><\/h3>Gets the URL directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$url = plugin_dir_url( __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for assets\nwp_enqueue_script( 'my-script', plugin_dir_url( __FILE__ ) . 'js\/script.js' );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Extracts the plugin’s relative path from its absolute file path.<\/p>
\/\/ In your-plugin\/your-plugin.php\n$basename = plugin_basename( __FILE__ );\n\/\/ Returns: 'your-plugin\/your-plugin.php'\n\n\/\/ Single-file plugin in plugins root\n$basename = plugin_basename( '\/var\/www\/html\/wp-content\/plugins\/hello.php' );\n\/\/ Returns: 'hello.php'<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Absolute path to plugin file<\/li><\/ul>Returns:<\/strong> (string) – Plugin path relative to plugins directory<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_path( $file )<\/code><\/h3>Gets the filesystem directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$path = plugin_dir_path( __FILE__ );\n\/\/ Returns: '\/var\/www\/html\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for includes\nrequire_once plugin_dir_path( __FILE__ ) . 'includes\/class-loader.php';<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – Directory path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_url( $file )<\/code><\/h3>Gets the URL directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$url = plugin_dir_url( __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for assets\nwp_enqueue_script( 'my-script', plugin_dir_url( __FILE__ ) . 'js\/script.js' );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Parameters:<\/strong><\/p>$file<\/code> (string) – Absolute path to plugin file<\/li><\/ul>Returns:<\/strong> (string) – Plugin path relative to plugins directory<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_path( $file )<\/code><\/h3>Gets the filesystem directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$path = plugin_dir_path( __FILE__ );\n\/\/ Returns: '\/var\/www\/html\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for includes\nrequire_once plugin_dir_path( __FILE__ ) . 'includes\/class-loader.php';<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – Directory path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_url( $file )<\/code><\/h3>Gets the URL directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$url = plugin_dir_url( __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for assets\nwp_enqueue_script( 'my-script', plugin_dir_url( __FILE__ ) . 'js\/script.js' );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
$file<\/code> (string) – Absolute path to plugin file<\/li><\/ul>Returns:<\/strong> (string) – Plugin path relative to plugins directory<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_path( $file )<\/code><\/h3>Gets the filesystem directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$path = plugin_dir_path( __FILE__ );\n\/\/ Returns: '\/var\/www\/html\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for includes\nrequire_once plugin_dir_path( __FILE__ ) . 'includes\/class-loader.php';<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – Directory path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_url( $file )<\/code><\/h3>Gets the URL directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$url = plugin_dir_url( __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for assets\nwp_enqueue_script( 'my-script', plugin_dir_url( __FILE__ ) . 'js\/script.js' );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Returns:<\/strong> (string) – Plugin path relative to plugins directory<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_path( $file )<\/code><\/h3>Gets the filesystem directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$path = plugin_dir_path( __FILE__ );\n\/\/ Returns: '\/var\/www\/html\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for includes\nrequire_once plugin_dir_path( __FILE__ ) . 'includes\/class-loader.php';<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – Directory path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_url( $file )<\/code><\/h3>Gets the URL directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$url = plugin_dir_url( __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for assets\nwp_enqueue_script( 'my-script', plugin_dir_url( __FILE__ ) . 'js\/script.js' );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_path( $file )<\/code><\/h3>Gets the filesystem directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$path = plugin_dir_path( __FILE__ );\n\/\/ Returns: '\/var\/www\/html\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for includes\nrequire_once plugin_dir_path( __FILE__ ) . 'includes\/class-loader.php';<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – Directory path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_url( $file )<\/code><\/h3>Gets the URL directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$url = plugin_dir_url( __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for assets\nwp_enqueue_script( 'my-script', plugin_dir_url( __FILE__ ) . 'js\/script.js' );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
wp-includes\/plugin.php<\/code><\/p>plugin_dir_path( $file )<\/code><\/h3>Gets the filesystem directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$path = plugin_dir_path( __FILE__ );\n\/\/ Returns: '\/var\/www\/html\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for includes\nrequire_once plugin_dir_path( __FILE__ ) . 'includes\/class-loader.php';<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – Directory path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_url( $file )<\/code><\/h3>Gets the URL directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$url = plugin_dir_url( __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for assets\nwp_enqueue_script( 'my-script', plugin_dir_url( __FILE__ ) . 'js\/script.js' );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
plugin_dir_path( $file )<\/code><\/h3>Gets the filesystem directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$path = plugin_dir_path( __FILE__ );\n\/\/ Returns: '\/var\/www\/html\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for includes\nrequire_once plugin_dir_path( __FILE__ ) . 'includes\/class-loader.php';<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – Directory path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_url( $file )<\/code><\/h3>Gets the URL directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$url = plugin_dir_url( __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for assets\nwp_enqueue_script( 'my-script', plugin_dir_url( __FILE__ ) . 'js\/script.js' );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Gets the filesystem directory path for a plugin file.<\/p>
\/\/ In your-plugin\/your-plugin.php\n$path = plugin_dir_path( __FILE__ );\n\/\/ Returns: '\/var\/www\/html\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for includes\nrequire_once plugin_dir_path( __FILE__ ) . 'includes\/class-loader.php';<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – Directory path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_url( $file )<\/code><\/h3>Gets the URL directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$url = plugin_dir_url( __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for assets\nwp_enqueue_script( 'my-script', plugin_dir_url( __FILE__ ) . 'js\/script.js' );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – Directory path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_url( $file )<\/code><\/h3>Gets the URL directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$url = plugin_dir_url( __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for assets\nwp_enqueue_script( 'my-script', plugin_dir_url( __FILE__ ) . 'js\/script.js' );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – Directory path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_url( $file )<\/code><\/h3>Gets the URL directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$url = plugin_dir_url( __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for assets\nwp_enqueue_script( 'my-script', plugin_dir_url( __FILE__ ) . 'js\/script.js' );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
__FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – Directory path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_url( $file )<\/code><\/h3>Gets the URL directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$url = plugin_dir_url( __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for assets\nwp_enqueue_script( 'my-script', plugin_dir_url( __FILE__ ) . 'js\/script.js' );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Returns:<\/strong> (string) – Directory path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_url( $file )<\/code><\/h3>Gets the URL directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$url = plugin_dir_url( __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for assets\nwp_enqueue_script( 'my-script', plugin_dir_url( __FILE__ ) . 'js\/script.js' );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugin_dir_url( $file )<\/code><\/h3>Gets the URL directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$url = plugin_dir_url( __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for assets\nwp_enqueue_script( 'my-script', plugin_dir_url( __FILE__ ) . 'js\/script.js' );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
wp-includes\/plugin.php<\/code><\/p>plugin_dir_url( $file )<\/code><\/h3>Gets the URL directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$url = plugin_dir_url( __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for assets\nwp_enqueue_script( 'my-script', plugin_dir_url( __FILE__ ) . 'js\/script.js' );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
plugin_dir_url( $file )<\/code><\/h3>Gets the URL directory path for a plugin file.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ In your-plugin\/your-plugin.php\n$url = plugin_dir_url( __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for assets\nwp_enqueue_script( 'my-script', plugin_dir_url( __FILE__ ) . 'js\/script.js' );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Gets the URL directory path for a plugin file.<\/p>
\/\/ In your-plugin\/your-plugin.php\n$url = plugin_dir_url( __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/'\n\n\/\/ Use for assets\nwp_enqueue_script( 'my-script', plugin_dir_url( __FILE__ ) . 'js\/script.js' );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
$file<\/code> (string) – Plugin’s __FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
__FILE__<\/code> constant<\/li><\/ul>Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Returns:<\/strong> (string) – URL path with trailing slash<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
wp-includes\/plugin.php<\/code><\/p>plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
plugins_url( $path, $plugin )<\/code><\/h3>Retrieves a URL within the plugins or mu-plugins directory.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Retrieves a URL within the plugins or mu-plugins directory.<\/p>
\/\/ Get plugins directory URL\n$url = plugins_url();\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins'\n\n\/\/ Get URL to specific file\n$url = plugins_url( 'js\/script.js', __FILE__ );\n\/\/ Returns: 'https:\/\/example.com\/wp-content\/plugins\/your-plugin\/js\/script.js'\n\n\/\/ Mu-plugin detection\n\/\/ If $plugin is in WPMU_PLUGIN_DIR, returns WPMU_PLUGIN_URL<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Parameters:<\/strong><\/p>$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
$path<\/code> (string) – Optional. Relative path within plugin directory. Default empty.<\/li>$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
$plugin<\/code> (string) – Optional. Plugin file path. Default empty.<\/li><\/ul>Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Returns:<\/strong> (string) – Plugins URL with optional path appended<\/p>Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Filter:<\/strong> plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
plugins_url<\/code> – Modify the returned URL<\/p>Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Source:<\/strong> wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
wp-includes\/link-template.php<\/code><\/p>wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
wp_register_plugin_realpath( $file )<\/code><\/h3>Registers a plugin’s real path for symlink resolution.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Registers a plugin’s real path for symlink resolution.<\/p>
\/\/ Useful for symlinked plugin development\nwp_register_plugin_realpath( __FILE__ );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Parameters:<\/strong><\/p>$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
$file<\/code> (string) – Known path to the file<\/li><\/ul>Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Returns:<\/strong> (bool) – Whether the path was registered<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
wp-includes\/plugin.php<\/code><\/p>Lifecycle Hook Registration<\/h2>register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
register_activation_hook( $file, $callback )<\/code><\/h3>Sets the activation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Sets the activation hook for a plugin.<\/p>
\/\/ Function callback\nregister_activation_hook( __FILE__, 'my_plugin_activate' );\n\nfunction my_plugin_activate() {\n \/\/ Create database tables\n \/\/ Set default options\n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n}\n\n\/\/ Class method callback\nregister_activation_hook( __FILE__, array( 'My_Plugin', 'activate' ) );\n\n\/\/ Object method\nregister_activation_hook( __FILE__, array( $this, 'activate' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
$callback<\/code> (callable) – Function to run on activation<\/li><\/ul>Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Action fired:<\/strong> activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
activate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
$plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
wp-includes\/plugin.php<\/code><\/p>register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
register_deactivation_hook( $file, $callback )<\/code><\/h3>Sets the deactivation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Sets the deactivation hook for a plugin.<\/p>
register_deactivation_hook( __FILE__, 'my_plugin_deactivate' );\n\nfunction my_plugin_deactivate() {\n \/\/ Clear scheduled events\n wp_clear_scheduled_hook( 'my_plugin_cron' );\n \n \/\/ Flush rewrite rules\n flush_rewrite_rules();\n \n \/\/ Note: Don't delete options here - that's for uninstall\n}<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
$file<\/code> (string) – Plugin main file path<\/li>$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
$callback<\/code> (callable) – Function to run on deactivation<\/li><\/ul>Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Action fired:<\/strong> deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
deactivate_{$plugin}<\/code> where $plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
$plugin<\/code> is the plugin basename<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
wp-includes\/plugin.php<\/code><\/p>register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
register_uninstall_hook( $file, $callback )<\/code><\/h3>Sets the uninstallation hook for a plugin.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Sets the uninstallation hook for a plugin.<\/p>
\/\/ Must be static method or function\nregister_uninstall_hook( __FILE__, 'my_plugin_uninstall' );\n\nfunction my_plugin_uninstall() {\n \/\/ Delete options\n delete_option( 'my_plugin_settings' );\n \n \/\/ Delete custom tables\n global $wpdb;\n $wpdb->query( "DROP TABLE IF EXISTS {$wpdb->prefix}my_plugin_data" );\n \n \/\/ Delete user meta\n delete_metadata( 'user', 0, 'my_plugin_user_data', '', true );\n}\n\n\/\/ Class static method\nregister_uninstall_hook( __FILE__, array( 'My_Plugin', 'uninstall' ) );<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Parameters:<\/strong><\/p>$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
$file<\/code> (string) – Plugin file path<\/li>$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
$callback<\/code> (callable) – Must be static method or function<\/strong><\/li><\/ul>Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Note:<\/strong> Alternative is uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
uninstall.php<\/code> file in plugin root.<\/p>Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Source:<\/strong> wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
wp-includes\/plugin.php<\/code><\/p>Plugin State Functions<\/h2>is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
is_plugin_active( $plugin )<\/code><\/h3>Determines whether a plugin is active.<\/p>php<\/span><\/use><\/svg><\/button><\/div>\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Determines whether a plugin is active.<\/p>
\/\/ Check by plugin basename\nif ( is_plugin_active( 'woocommerce\/woocommerce.php' ) ) {\n \/\/ WooCommerce is active\n}\n\n\/\/ Note: Only checks plugins\/ directory, not mu-plugins\/\n\/\/ For mu-plugins, check if class\/function exists instead<\/code><\/pre><\/div>Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Parameters:<\/strong><\/p>$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
$plugin<\/code> (string) – Plugin path relative to plugins directory<\/li><\/ul>Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Returns:<\/strong> (bool) – True if active (site or network), false otherwise<\/p>Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Note:<\/strong> Only available after plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
plugins_loaded<\/code>. Include wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
wp-admin\/includes\/plugin.php<\/code> for frontend use.<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
is_plugin_inactive( $plugin )<\/code><\/h3>Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Determines whether a plugin is inactive. Reverse of is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
is_plugin_active()<\/code>.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
if ( is_plugin_inactive( 'old-plugin\/old-plugin.php' ) ) {\n \/\/ Plugin is not active\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
wp-admin\/includes\/plugin.php<\/code><\/p>is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
is_plugin_active_for_network( $plugin )<\/code><\/h3>Determines whether a plugin is network-activated (Multisite only).<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Determines whether a plugin is network-activated (Multisite only).<\/p>
if ( is_plugin_active_for_network( 'my-plugin\/my-plugin.php' ) ) {\n \/\/ Plugin is network-activated\n}<\/code><\/pre><\/div>Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Returns:<\/strong> (bool) – True if network-activated, false if single-site active or inactive<\/p>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
wp-admin\/includes\/plugin.php<\/code><\/p>is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
is_network_only_plugin( $plugin )<\/code><\/h3>Checks for "Network: true" in the plugin header.<\/p>php<\/span><\/use><\/svg><\/button><\/div>if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Checks for "Network: true" in the plugin header.<\/p>
if ( is_network_only_plugin( 'multisite-only\/multisite-only.php' ) ) {\n \/\/ Plugin requires network activation\n}<\/code><\/pre><\/div>Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Source:<\/strong> wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
wp-admin\/includes\/plugin.php<\/code><\/p>Plugin Management Functions<\/h2>activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
activate_plugin( $plugin, $redirect, $network_wide, $silent )<\/code><\/h3>Attempts to activate a plugin.<\/p>
Attempts to activate a plugin.<\/p>