Query Post – Search Parameter example

Hi @garrettb,
By default, this feature isn’t available. But you can achieve this with a custom filter.

Copy the code below and paste it to your Theme Functions file.
Note: You have to replace the word How with the text you want to use for the search query.

Code:

function wpse_298888_posts_where( $where, $query ) {
    global $wpdb;

    $starts_with = esc_sql( $query->get( 'starts_with' ) );

    if ( $starts_with ) {
        $where .= " AND $wpdb->posts.post_title LIKE '$starts_with%'";
    }

    return $where;
}
add_filter( 'posts_where', 'wpse_298888_posts_where', 10, 2 );

function post_grid_query_args_20200429($query_args, $args){
    
  
  $extra_query = array (

      'starts_with' => 'How',

      );

  return array_merge($query_args, $extra_query);
  }

add_filter('post_grid_query_args','post_grid_query_args_20200429', 10, 2);

Where to Paste?
From your WordPress dashboard, go to Appearance => Theme File Editor. Select the Theme Functions file from the right sidebar and paste the code to the bottom of that file.
Screenshot: https://i.imgur.com/hNBKNyU.png

Let us know if it helps.
Regards.

Best wishes.