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<?php /* * This file is part of Respect/Validation. * * (c) Alexandre Gomes Gaigalas <alexandre@gaigalas.net> * * 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 ctype_alpha; /** * Validates whether the input contains only alphabetic characters. * * @author Alexandre Gomes Gaigalas <alexandre@gaigalas.net> * @author Henrique Moody <henriquemoody@gmail.com> * @author Nick Lombard <github@jigsoft.co.za> */ final class Alpha extends AbstractFilterRule { /** * {@inheritDoc} */ protected function validateFilteredInput(string $input): bool { return ctype_alpha($input); } }