<?php /* * Copyright (c) Alexandre Gomes Gaigalas <alganet@gmail.com> * SPDX-License-Identifier: MIT */ 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; } }