name : AlphaDashSpace.php <?php namespace Statamic\Rules; use Closure; use Illuminate\Contracts\Validation\ValidationRule; class AlphaDashSpace implements ValidationRule { public function validate(string $attribute, mixed $value, Closure $fail): void { // Same as `alpha_dash`, but allows spaces if (! preg_match('/\A[ \pL\pM\pN_-]+\z/u', $value)) { $fail('statamic::validation.alpha_dash')->translate(); } } }