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<?php |
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/* |
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* This file is part of the overtrue/wechat. |
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* |
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* (c) overtrue <[email protected]> |
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* |
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* This source file is subject to the MIT license that is bundled |
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* with this source code in the file LICENSE. |
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*/ |
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namespace EasyWeChat\Kernel\Support; |
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use finfo; |
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/** |
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* Class File. |
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*/ |
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class File |
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{ |
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/** |
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* MIME mapping. |
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* |
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* @var array |
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*/ |
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protected static $extensionMap = [ |
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'audio/wav' => '.wav', |
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'audio/x-ms-wma' => '.wma', |
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'video/x-ms-wmv' => '.wmv', |
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'video/mp4' => '.mp4', |
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'audio/mpeg' => '.mp3', |
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'audio/amr' => '.amr', |
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'application/vnd.rn-realmedia' => '.rm', |
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'audio/mid' => '.mid', |
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'image/bmp' => '.bmp', |
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'image/gif' => '.gif', |
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'image/png' => '.png', |
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'image/tiff' => '.tiff', |
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'image/jpeg' => '.jpg', |
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'application/pdf' => '.pdf', |
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// 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 |
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'application/msword' => '.doc', |
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'application/vnd.openxmlformats-officedocument.wordprocessingml.document' => '.docx', |
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'application/vnd.openxmlformats-officedocument.wordprocessingml.template' => '.dotx', |
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'application/vnd.ms-word.document.macroEnabled.12' => '.docm', |
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'application/vnd.ms-word.template.macroEnabled.12' => '.dotm', |
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'application/vnd.ms-excel' => '.xls', |
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'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' => '.xlsx', |
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'application/vnd.openxmlformats-officedocument.spreadsheetml.template' => '.xltx', |
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'application/vnd.ms-excel.sheet.macroEnabled.12' => '.xlsm', |
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'application/vnd.ms-excel.template.macroEnabled.12' => '.xltm', |
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'application/vnd.ms-excel.addin.macroEnabled.12' => '.xlam', |
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'application/vnd.ms-excel.sheet.binary.macroEnabled.12' => '.xlsb', |
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'application/vnd.ms-powerpoint' => '.ppt', |
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'application/vnd.openxmlformats-officedocument.presentationml.presentation' => '.pptx', |
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'application/vnd.openxmlformats-officedocument.presentationml.template' => '.potx', |
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'application/vnd.openxmlformats-officedocument.presentationml.slideshow' => '.ppsx', |
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'application/vnd.ms-powerpoint.addin.macroEnabled.12' => '.ppam', |
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]; |
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/** |
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* File header signatures. |
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* |
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* @var array |
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*/ |
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protected static $signatures = [ |
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'ffd8ff' => '.jpg', |
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'424d' => '.bmp', |
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'47494638' => '.gif', |
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'2f55736572732f6f7665' => '.png', |
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'89504e47' => '.png', |
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'494433' => '.mp3', |
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'fffb' => '.mp3', |
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'fff3' => '.mp3', |
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'3026b2758e66cf11' => '.wma', |
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'52494646' => '.wav', |
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'57415645' => '.wav', |
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'41564920' => '.avi', |
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'000001ba' => '.mpg', |
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'000001b3' => '.mpg', |
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'2321414d52' => '.amr', |
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'25504446' => '.pdf', |
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]; |
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/** |
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* Return steam extension. |
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* |
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* @param string $stream |
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* |
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* @return string|false |
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*/ |
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public static function getStreamExt($stream) |
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{ |
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$ext = self::getExtBySignature($stream); |
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try { |
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if (empty($ext) && is_readable($stream)) { |
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$stream = file_get_contents($stream); |
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} |
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} catch (\Exception $e) { |
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} |
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$fileInfo = new finfo(FILEINFO_MIME); |
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$mime = strstr($fileInfo->buffer($stream), ';', true); |
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return isset(self::$extensionMap[$mime]) ? self::$extensionMap[$mime] : $ext; |
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} |
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/** |
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* Get file extension by file header signature. |
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* |
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* @param string $stream |
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* |
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* @return string |
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*/ |
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public static function getExtBySignature($stream) |
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{ |
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$prefix = strval(bin2hex(mb_strcut($stream, 0, 10))); |
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foreach (self::$signatures as $signature => $extension) { |
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if (0 === strpos($prefix, strval($signature))) { |
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return $extension; |
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} |
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} |
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1 |
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return ''; |
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} |
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} |
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overtrue /
wechat
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