zlibproxy/vendor/workerman/validation/library/Rules/PhpLabel.php
2023-01-02 19:56:44 +08:00

36 lines
895 B
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 if a value is considered a valid PHP Label, so that it can be used as a variable, function or class name.
*
* @author Danilo Correa <danilosilva87@gmail.com>
* @author Emmerson Siqueira <emmersonsiqueira@gmail.com>
* @author Henrique Moody <henriquemoody@gmail.com>
*/
final class PhpLabel extends AbstractRule
{
/**
* {@inheritDoc}
*/
public function validate($input): bool
{
return is_string($input) && preg_match('/^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*$/', $input);
}
}