文件的MIME-TYPE

header("content-type:text/html;charset=gbk");$mime = array(    'gif' => 'image/gif',    'jpg' => 'image/jpeg',    'jpeg' => 'image/jpeg',    'jpe' => 'image/jpeg',    'bmp' => 'image/bmp',    'png' => 'image/png',    'tif' => 'image/tiff',    'tiff' => 'image/tiff',    'pict' => 'image/x-pict',    'pic' => 'image/x-pict',    'pct' => 'image/x-pict',    'tif' => 'image/tiff',    'tiff' => 'image/tiff',    'psd' => 'image/x-photoshop',    'swf' => 'application/x-shockwave-flash',    'js' => 'application/x-javascrīpt',    'pdf' => 'application/pdf',    'ps' => 'application/postscrīpt',    'eps' => 'application/postscrīpt',    'ai' => 'application/postscrīpt',    'wmf' => 'application/x-msmetafile',    'css' => 'text/css',    'htm' => 'text/html',    'html' => 'text/html',    'txt' => 'text/plain',    'xml' => 'text/xml',    'wml' => 'text/wml',    'wbmp' => 'image/vnd.wap.wbmp',    'mid' => 'audio/midi',    'wav' => 'audio/wav',    'mp3' => 'audio/mpeg',    'mp2' => 'audio/mpeg',    'avi' => 'video/x-msvideo',    'mpeg' => 'video/mpeg',    'mpg' => 'video/mpeg',    'qt' => 'video/quicktime',    'mov' => 'video/quicktime',    'lha' => 'application/x-lha',    'lzh' => 'application/x-lha',    'z' => 'application/x-compress',    'gtar' => 'application/x-gtar',    'gz' => 'application/x-gzip',    'gzip' => 'application/x-gzip',    'tgz' => 'application/x-gzip',    'tar' => 'application/x-tar',    'bz2' => 'application/bzip2',    'zip' => 'application/zip',    'arj' => 'application/x-arj',    'rar' => 'application/x-rar-compressed',    'hqx' => 'application/mac-binhex40',    'sit' => 'application/x-stuffit',    'bin' => 'application/x-macbinary',    'uu' => 'text/x-uuencode',    'uue' => 'text/x-uuencode',    'latex'=> 'application/x-latex',    'ltx' => 'application/x-latex',    'tcl' => 'application/x-tcl',    'pgp' => 'application/pgp',    'asc' => 'application/pgp',    'exe' => 'application/x-msdownload',    'doc' => 'application/msword',    'rtf' => 'application/rtf',    'xls' => 'application/vnd.ms-excel',    'ppt' => 'application/vnd.ms-powerpoint',    'mdb' => 'application/x-msaccess',    'wri' => 'application/x-mswrite',);$url = 'http://tp4.sinaimg.cn/1692980395/180/1298526784/0';//$url = 'http://www.baidu.com/';$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);curl_setopt($ch, CURLOPT_HEADER, 1);curl_setopt($ch, CURLOPT_NOBODY, 1);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);$contents = curl_exec($ch);curl_close($ch);if(preg_match('/Content-Type:\s+(.*?)(?:;|\s)/i',$contents,$arr)){  $mimestr = strtolower(trim($arr[1]));  $outkey = array_keys($mime,$mimestr);  echo '文件类型是：'.implode(',',$outkey) ;}else{  echo '没有匹配到类型';}