HighSpeaker/vendor/workerman/validation/library/Rules/Base64.php
2022-12-24 22:10:40 +08:00

45 lines
952 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 mb_strlen;
use function preg_match;
/**
* Validate if a string is Base64-encoded.
*
* @author Henrique Moody <henriquemoody@gmail.com>
* @author Jens Segers <segers.jens@gmail.com>
* @author William Espindola <oi@williamespindola.com.br>
*/
final class Base64 extends AbstractRule
{
/**
* {@inheritDoc}
*/
public function validate($input): bool
{
if (!is_string($input)) {
return false;
}
if (!preg_match('#^[A-Za-z0-9+/\n\r]+={0,2}$#', $input)) {
return false;
}
return mb_strlen($input) % 4 === 0;
}
}