<?php /* * This file is part of the overtrue/wechat. * * (c) overtrue <i@overtrue.me> * * This source file is subject to the MIT license that is bundled * with this source code in the file LICENSE. */ /** * File.php. * * @author overtrue <i@overtrue.me> * @copyright 2015 overtrue <i@overtrue.me> * * @see https://github.com/overtrue * @see http://overtrue.me */ namespace EasyWeChat\Support; use finfo; /** * Class File. */ class File { /** * MIME mapping. * * @var array */ protected static $extensionMap = [ 'audio/wav' => '.wav', 'audio/x-ms-wma' => '.wma', 'video/x-ms-wmv' => '.wmv', 'video/mp4' => '.mp4', 'audio/mpeg' => '.mp3', 'audio/amr' => '.amr', 'application/vnd.rn-realmedia' => '.rm', 'audio/mid' => '.mid', 'image/bmp' => '.bmp', 'image/gif' => '.gif', 'image/png' => '.png', 'image/tiff' => '.tiff', 'image/jpeg' => '.jpg', // 列举更多的文件 mime, 企业号是支持的, 公众平台这边之后万一也更新了呢 'application/msword' => '.doc', 'application/vnd.openxmlformats-officedocument.wordprocessingml.document' => '.docx', 'application/vnd.openxmlformats-officedocument.wordprocessingml.template' => '.dotx', 'application/vnd.ms-word.document.macroEnabled.12' => '.docm', 'application/vnd.ms-word.template.macroEnabled.12' => '.dotm', 'application/vnd.ms-excel' => '.xls', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' => '.xlsx', 'application/vnd.openxmlformats-officedocument.spreadsheetml.template' => '.xltx', 'application/vnd.ms-excel.sheet.macroEnabled.12' => '.xlsm', 'application/vnd.ms-excel.template.macroEnabled.12' => '.xltm', 'application/vnd.ms-excel.addin.macroEnabled.12' => '.xlam', 'application/vnd.ms-excel.sheet.binary.macroEnabled.12' => '.xlsb', 'application/vnd.ms-powerpoint' => '.ppt', 'application/vnd.openxmlformats-officedocument.presentationml.presentation' => '.pptx', 'application/vnd.openxmlformats-officedocument.presentationml.template' => '.potx', 'application/vnd.openxmlformats-officedocument.presentationml.slideshow' => '.ppsx', 'application/vnd.ms-powerpoint.addin.macroEnabled.12' => '.ppam', ]; /** * File header signatures. * * @var array */ protected static $signatures = [ 'ffd8ff' => '.jpg', '424d' => '.bmp', '47494638' => '.gif', '89504e47' => '.png', '494433' => '.mp3', 'fffb' => '.mp3', 'fff3' => '.mp3', '3026b2758e66cf11' => '.wma', '52494646' => '.wav', '57415645' => '.wav', '41564920' => '.avi', '000001ba' => '.mpg', '000001b3' => '.mpg', '2321414d52' => '.amr', ]; /** * Return steam extension. * * @param string $stream * * @return string|false */ public static function getStreamExt($stream) { try { if (is_readable($stream)) { $stream = file_get_contents($stream); } } catch (\Exception $e) { return false; } $finfo = new finfo(FILEINFO_MIME); $mime = strstr($finfo->buffer($stream), ';', true); return isset(self::$extensionMap[$mime]) ? self::$extensionMap[$mime] : self::getExtBySignature($stream); } /** * Get file extension by file header signature. * * @param string $stream * * @return string */ public static function getExtBySignature($stream) { $prefix = strval(bin2hex(mb_strcut($stream, 0, 10))); foreach (self::$signatures as $signature => $extension) { if (0 === strpos($prefix, strval($signature))) { return $extension; } } return ''; } }