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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 is_string; use function mb_strtolower; /** * Validates whether the characters in the input are lowercase. * * @author Alexandre Gomes Gaigalas <alexandre@gaigalas.net> * @author Danilo Benevides <danilobenevides01@gmail.com> * @author Henrique Moody <henriquemoody@gmail.com> * @author Jean Pimentel <jeanfap@gmail.com> */ final class Lowercase extends AbstractRule { /** * {@inheritDoc} */ public function validate($input): bool { if (!is_string($input)) { return false; } return $input === mb_strtolower($input); } }