/** * * 检测文件的真实类型 * * @param string $srcPath 文件路径 * * @return string $realType 文件真实类型 * */$imgurl = 'http://pic.babytree.com/foto3/thumbs/2015/0506/51/8/357557aa334dd03923a408f_nb.jpg';echo file_type_detect($imgurl);function file_type_detect($srcPath){ $types = array( 6677 => 'bmp', 7173 => 'gif', 7368 => 'mp3', 13780 => 'png', 255216 => 'jpg', ); $curl_obj = new cURL(false); $binary = $curl_obj->get($srcPath); //$binary = file_get_contents($srcPath); $bytes = substr($binary, 0, 2); $head = @unpack('C2char', $bytes); $typeCode = intval($head['char1'].$head['char2']); $realType = isset($types[$typeCode]) ? $types[$typeCode] : $typeCode; return $realType;}判断文件的真实类型
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