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<?php
/*
* This file is part of Respect/Validation.
*
* (c) Alexandre Gomes Gaigalas <[email protected]>
* For the full copyright and license information, please view the "LICENSE.md"
* file that was distributed with this source code.
*/
declare(strict_types=1);
namespace Respect\Validation\Rules;
use function preg_match;
class Vowel extends AbstractFilterRule
{
protected function validateClean($input)
return preg_match('/^(\s|[aeiouAEIOU])*$/', $input) > 0;
}