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* * For the full copyright and license information, please view the LICENSE file * that was distributed with this source code. */ declare(strict_types=1); namespace Respect\Validation\Rules; use function preg_match; /** * Validates whether the input contains only vowels. * * @author Henrique Moody
* @author Nick Lombard
*/ final class Vowel extends AbstractFilterRule { /** * {@inheritDoc} */ protected function validateFilteredInput(string $input): bool { return preg_match('/^[aeiouAEIOU]+$/', $input) > 0; } }