Description
Regex Validation for Gravity Forms adds a powerful regex validation option to your Gravity Forms fields. Define custom regular expression patterns or choose from built-in presets to validate user input — both server-side and client-side.
Features
- Custom regex patterns — Add any regular expression to validate field input
- Unicode support — Full Unicode character class support (
\p{L},\p{N}) for international names and text - Built-in presets — Quick-select common patterns for names, emails, phone numbers, and more
- Server-side validation — Secure PHP validation that can’t be bypassed
- Client-side validation — Instant feedback on input change using JavaScript
- Compound field support — Works with Name fields (validates each sub-input individually)
- Custom error messages — Define user-friendly validation messages per field
- Extensible — Add your own presets and field types via filters
- Accessible — Error messages use
role="alert"for screen readers
Supported Field Types
- Text
- Name (with individual sub-input validation)
- Phone
- Website
- Textarea
Built-in Presets
- Name — Unicode letters, spaces, hyphens, apostrophes
- Email — RFC 5322 compliant
- US Phone Number — Common US formats
- International Phone Number — E.164 format
- Alphanumeric — Unicode letters and numbers only
- No Special Characters — Unicode letters, numbers, and spaces only
Installation
From WordPress Admin
- Upload the
regex-validation-for-gravity-formsfolder to/wp-content/plugins/ - Activate the plugin through the ‘Plugins’ menu in WordPress
Via Composer
composer require zirkeldesign/regex-validation-for-gravity-forms
Requirements
- WordPress 6.0 or later
- PHP 8.2 or later
- Gravity Forms 2.5 or later
FAQ
-
How do I add a regex pattern to a field?
-
Edit your form in Gravity Forms, select a supported field, and look for the “Regex Validation” section under the field settings. You can either select a preset pattern or enter your own custom regex.
-
Does it support Unicode characters?
-
Yes! All patterns use the
/uflag for PHP and theuflag for JavaScript regex, enabling full Unicode property support like\p{L}for any letter in any language. -
Can I add my own presets?
-
Yes, use the
gf_regex_validation_presetsfilter:add_filter('gf_regex_validation_presets', function (array $presets): array { $presets['zip_code'] = [ 'label' => 'US Zip Code', 'pattern' => '/^\d{5}(-\d{4})?$/', 'message' => 'Please enter a valid US zip code.', ]; return $presets; }); -
Can I add support for additional field types?
-
Yes, use the
gf_regex_validation_field_typesfilter:add_filter('gf_regex_validation_field_types', function (array $types): array { $types[] = 'number'; return $types; }); -
Is client-side validation secure?
-
Client-side validation provides instant user feedback but should never be relied upon for security. This plugin always performs server-side validation as well, which cannot be bypassed.
Reviews
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Contributors & Developers
“Regex Validation for Gravity Forms” is open source software. The following people have contributed to this plugin.
Contributors
Translate “Regex Validation for Gravity Forms” into your language.
Interested in development?
Browse the code, check out the SVN repository, or subscribe to the development log by RSS.
Changelog
1.0.2
- Fixed: Admin field settings not appearing in Gravity Forms editor
- Improved: Code quality and WordPress coding standards compliance
- Enhanced: Development tooling for better maintainability
1.0.1
- Fixed: WordPress Plugin Check compliance issues
- Improved: Security and code standards
1.0.0
- Initial release
- Server-side and client-side regex validation
- Built-in presets for common patterns
- Unicode support with
\p{L}and\p{N}character classes - Name field compound input support
- Extensible via
gf_regex_validation_presetsandgf_regex_validation_field_typesfilters