respect-validation/library/Rules/Version.php

<?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 preg_match;

/**
 * Validates version numbers using Semantic Versioning.
 *
 * @see http://semver.org/
 *
 * @author Danilo Correa <danilosilva87@gmail.com>
 * @author Henrique Moody <henriquemoody@gmail.com>
 */
final class Version extends AbstractRule
{
    /**
     * {@inheritDoc}
     */
    public function validate($input): bool
    {
        if (!is_string($input)) {
            return false;
        }

        return preg_match('/^[0-9]+\.[0-9]+\.[0-9]+([+-][^+-][0-9A-Za-z-.]*)?$/', $input) > 0;
    }
}