Adds custom regex validation with Unicode support and presets to Gravity Forms fields.

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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.
<h4>Features</h4>
<ul>
<li>Custom regex patterns — Add any regular expression to validate field input</li>
<li>Unicode support — Full Unicode character class support (<code>\p{L}</code>, <code>\p{N}</code>) for international names and text</li>
<li>Built-in presets — Quick-select common patterns for names, emails, phone numbers, and more</li>
<li>Server-side validation — Secure PHP validation that can’t be bypassed</li>
<li>Client-side validation — Instant feedback on input change using JavaScript</li>
<li>Compound field support — Works with Name fields (validates each sub-input individually)</li>
<li>Custom error messages — Define user-friendly validation messages per field</li>
<li>Extensible — Add your own presets and field types via filters</li>
<li>Accessible — Error messages use <code>role="alert"</code> for screen readers</li>
</ul>
<h4>Supported Field Types</h4>
<ul>
<li>Text</li>
<li>Name (with individual sub-input validation)</li>
<li>Email</li>
<li>Phone</li>
<li>Website</li>
<li>Textarea</li>
</ul>
<h4>Built-in Presets</h4>
<ul>
<li>Name — Unicode letters, spaces, hyphens, apostrophes</li>
<li>Email — RFC 5322 compliant</li>
<li>US Phone Number — Common US formats</li>
<li>International Phone Number — E.164 format</li>
<li>Alphanumeric — Unicode letters and numbers only</li>
<li>No Special Characters — Unicode letters, numbers, and spaces only</li>
</ul>

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