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

67 lines
1.4 KiB
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 finfo;
use SplFileInfo;
use function is_file;
use function is_string;
use function mb_strpos;
use const FILEINFO_MIME_TYPE;
/**
* Validates if the file is a valid image by checking its MIME type.
*
* @author Danilo Benevides <danilobenevides01@gmail.com>
* @author Guilherme Siani <guilherme@siani.com.br>
* @author Henrique Moody <henriquemoody@gmail.com>
*/
final class Image extends AbstractRule
{
/**
* @var finfo
*/
private $fileInfo;
/**
* Initializes the rule.
*/
public function __construct(?finfo $fileInfo = null)
{
$this->fileInfo = $fileInfo ?: new finfo(FILEINFO_MIME_TYPE);
}
/**
* {@inheritDoc}
*/
public function validate($input): bool
{
if ($input instanceof SplFileInfo) {
return $this->validate($input->getPathname());
}
if (!is_string($input)) {
return false;
}
if (!is_file($input)) {
return false;
}
return mb_strpos((string) $this->fileInfo->file($input), 'image/') === 0;
}
}