lib/filelib.php

   1 <?php //$Id$
   2
   3 define('BYTESERVING_BOUNDARY', 's1k2o3d4a5k6s7'); //unique string constant
   4
   5 function get_file_url($path, $options=null, $type='coursefile') {
   6     global $CFG;
   7
   8     $path = trim($path, '/'); // no leading and trailing slashes
   9
  10     // type of file
  11     switch ($type) {
  12         case 'coursefile':
  13         default:
  14             $url = "$CFG->wwwroot/file.php";
  15     }
  16
  17     if ($CFG->slasharguments) {
  18         $parts = explode('/', $path);
  19         $parts = array_map('rawurlencode', $parts);
  20         $path  = implode('/', $parts);
  21         $ffurl = "$CFG->wwwroot/file.php/$path";
  22         $separator = '?';
  23     } else {
  24         $path = rawurlencode("/$path");
  25         $ffurl = "$CFG->wwwroot/file.php?file=$path";
  26         $separator = '&amp;';
  27     }
  28
  29     if ($options) {
  30         foreach ($options as $name=>$value) {
  31             $ffurl = $ffurl.$separator.$name.'='.$value;
  32             $separator = '&amp;';
  33         }
  34     }
  35
  36     return $ffurl;
  37 }
  38
  39 /**
  40  * Fetches content of file from Internet (using proxy if defined). Uses cURL extension if present.
  41  * Due to security concerns only downloads from http(s) sources are supported.
  42  *
  43  * @param string $url file url starting with http(s)://
  44  * @param array $headers http headers, null if none. If set, should be an
  45  *   associative array of header name => value pairs.
  46  * @param array $postdata array means use POST request with given parameters
  47  * @param bool $fullresponse return headers, responses, etc in a similar way snoopy does
  48  *   (if false, just returns content)
  49  * @param int $timeout timeout for complete download process including all file transfer
  50  *   (default 5 minutes)
  51  * @param int $connecttimeout timeout for connection to server; this is the timeout that
  52  *   usually happens if the remote server is completely down (default 20 seconds);
  53  *   may not work when using proxy
  54  * @param bool $skipcertverify If true, the peer's SSL certificate will not be checked. Only use this when already in a trusted location.
  55  * @return mixed false if request failed or content of the file as string if ok.
  56  */
  57 function download_file_content($url, $headers=null, $postdata=null, $fullresponse=false, $timeout=300, $connecttimeout=20, $skipcertverify=false) {
  58     global $CFG;
  59
  60     // some extra security
  61     $newlines = array("\r", "\n");
  62     if (is_array($headers) ) {
  63         foreach ($headers as $key => $value) {
  64             $headers[$key] = str_replace($newlines, '', $value);
  65         }
  66     }
  67     $url = str_replace($newlines, '', $url);
  68     if (!preg_match('|^https?://|i', $url)) {
  69         if ($fullresponse) {
  70             $response = new object();
  71             $response->status        = 0;
  72             $response->headers       = array();
  73             $response->response_code = 'Invalid protocol specified in url';
  74             $response->results       = '';
  75             $response->error         = 'Invalid protocol specified in url';
  76             return $response;
  77         } else {
  78             return false;
  79         }
  80     }
  81
  82
  83     if (!extension_loaded('curl') or ($ch = curl_init($url)) === false) {
  84         require_once($CFG->libdir.'/snoopy/Snoopy.class.inc');
  85         $snoopy = new Snoopy();
  86         $snoopy->read_timeout = $timeout;
  87         $snoopy->_fp_timeout  = $connecttimeout;
  88         $snoopy->proxy_host   = $CFG->proxyhost;
  89         $snoopy->proxy_port   = $CFG->proxyport;
  90         if (!empty($CFG->proxyuser) and !empty($CFG->proxypassword)) {
  91             // this will probably fail, but let's try it anyway
  92             $snoopy->proxy_user     = $CFG->proxyuser;
  93             $snoopy->proxy_password = $CFG->proxypassword;
  94         }
  95         if (is_array($headers) ) {
  96             $client->rawheaders = $headers;
  97         }
  98
  99         if (is_array($postdata)) {
 100             $fetch = @$snoopy->fetch($url, $postdata); // use more specific debug code bellow
 101         } else {
 102             $fetch = @$snoopy->fetch($url); // use more specific debug code bellow
 103         }
 104
 105         if ($fetch) {
 106             if ($fullresponse) {
 107                 //fix header line endings
 108                 foreach ($snoopy->headers as $key=>$unused) {
 109                     $snoopy->headers[$key] = trim($snoopy->headers[$key]);
 110                 }
 111                 $response = new object();
 112                 $response->status        = $snoopy->status;
 113                 $response->headers       = $snoopy->headers;
 114                 $response->response_code = trim($snoopy->response_code);
 115                 $response->results       = $snoopy->results;
 116                 $response->error         = $snoopy->error;
 117                 return $response;
 118
 119             } else if ($snoopy->status != 200) {
 120                 debugging("Snoopy request for \"$url\" failed, http response code: ".$snoopy->response_code, DEBUG_ALL);
 121                 return false;
 122
 123             } else {
 124                 return $snoopy->results;
 125             }
 126         } else {
 127             if ($fullresponse) {
 128                 $response = new object();
 129                 $response->status        = $snoopy->status;
 130                 $response->headers       = array();
 131                 $response->response_code = $snoopy->response_code;
 132                 $response->results       = '';
 133                 $response->error         = $snoopy->error;
 134                 return $response;
 135             } else {
 136                 debugging("Snoopy request for \"$url\" failed with: ".$snoopy->error, DEBUG_ALL);
 137                 return false;
 138             }
 139         }
 140     }
 141
 142     // set extra headers
 143     if (is_array($headers) ) {
 144         $headers2 = array();
 145         foreach ($headers as $key => $value) {
 146             $headers2[] = "$key: $value";
 147         }
 148         curl_setopt($ch, CURLOPT_HTTPHEADER, $headers2);
 149     }
 150
 151
 152     if ($skipcertverify) {
 153         curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
 154     }
 155
 156     // use POST if requested
 157     if (is_array($postdata)) {
 158         foreach ($postdata as $k=>$v) {
 159             $postdata[$k] = urlencode($k).'='.urlencode($v);
 160         }
 161         $postdata = implode('&', $postdata);
 162         curl_setopt($ch, CURLOPT_POST, true);
 163         curl_setopt($ch, CURLOPT_POSTFIELDS, $postdata);
 164     }
 165
 166     curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
 167     curl_setopt($ch, CURLOPT_HEADER, true);
 168     curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $connecttimeout);
 169     curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
 170     if (!ini_get('open_basedir') and !ini_get('safe_mode')) {
 171         // TODO: add version test for '7.10.5'
 172         curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
 173         curl_setopt($ch, CURLOPT_MAXREDIRS, 5);
 174     }
 175
 176     if (!empty($CFG->proxyhost)) {
 177         // SOCKS supported in PHP5 only
 178         if (!empty($CFG->proxytype) and ($CFG->proxytype == 'SOCKS5')) {
 179             if (defined('CURLPROXY_SOCKS5')) {
 180                 curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
 181             } else {
 182                 curl_close($ch);
 183                 if ($fullresponse) {
 184                     $response = new object();
 185                     $response->status        = '0';
 186                     $response->headers       = array();
 187                     $response->response_code = 'SOCKS5 proxy is not supported in PHP4';
 188                     $response->results       = '';
 189                     $response->error         = 'SOCKS5 proxy is not supported in PHP4';
 190                     return $response;
 191                 } else {
 192                     debugging("SOCKS5 proxy is not supported in PHP4.", DEBUG_ALL);
 193                     return false;
 194                 }
 195             }
 196         }
 197
 198         curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, false);
 199
 200         if (empty($CFG->proxyport)) {
 201             curl_setopt($ch, CURLOPT_PROXY, $CFG->proxyhost);
 202         } else {
 203             curl_setopt($ch, CURLOPT_PROXY, $CFG->proxyhost.':'.$CFG->proxyport);
 204         }
 205
 206         if (!empty($CFG->proxyuser) and !empty($CFG->proxypassword)) {
 207             curl_setopt($ch, CURLOPT_PROXYUSERPWD, $CFG->proxyuser.':'.$CFG->proxypassword);
 208             if (defined('CURLOPT_PROXYAUTH')) {
 209                 // any proxy authentication if PHP 5.1
 210                 curl_setopt($ch, CURLOPT_PROXYAUTH, CURLAUTH_BASIC | CURLAUTH_NTLM);
 211             }
 212         }
 213     }
 214
 215     $data = curl_exec($ch);
 216
 217     // try to detect encoding problems
 218     if ((curl_errno($ch) == 23 or curl_errno($ch) == 61) and defined('CURLOPT_ENCODING')) {
 219         curl_setopt($ch, CURLOPT_ENCODING, 'none');
 220         $data = curl_exec($ch);
 221     }
 222
 223     if (curl_errno($ch)) {
 224         $error    = curl_error($ch);
 225         $error_no = curl_errno($ch);
 226         curl_close($ch);
 227
 228         if ($fullresponse) {
 229             $response = new object();
 230             if ($error_no == 28) {
 231                 $response->status    = '-100'; // mimic snoopy
 232             } else {
 233                 $response->status    = '0';
 234             }
 235             $response->headers       = array();
 236             $response->response_code = $error;
 237             $response->results       = '';
 238             $response->error         = $error;
 239             return $response;
 240         } else {
 241             debugging("cURL request for \"$url\" failed with: $error ($error_no)", DEBUG_ALL);
 242             return false;
 243         }
 244
 245     } else {
 246         $info = curl_getinfo($ch);
 247         curl_close($ch);
 248
 249         if (empty($info['http_code'])) {
 250             // for security reasons we support only true http connections (Location: file:// exploit prevention)
 251             $response = new object();
 252             $response->status        = '0';
 253             $response->headers       = array();
 254             $response->response_code = 'Unknown cURL error';
 255             $response->results       = ''; // do NOT change this!
 256             $response->error         = 'Unknown cURL error';
 257
 258         } else {
 259             // strip redirect headers and get headers array and content
 260             $data = explode("\r\n\r\n", $data, $info['redirect_count'] + 2);
 261             $results = array_pop($data);
 262             $headers = array_pop($data);
 263             $headers = explode("\r\n", trim($headers));
 264
 265             $response = new object();;
 266             $response->status        = (string)$info['http_code'];
 267             $response->headers       = $headers;
 268             $response->response_code = $headers[0];
 269             $response->results       = $results;
 270             $response->error         = '';
 271         }
 272
 273         if ($fullresponse) {
 274             return $response;
 275         } else if ($info['http_code'] != 200) {
 276             debugging("cURL request for \"$url\" failed, HTTP response code: ".$response->response_code, DEBUG_ALL);
 277             return false;
 278         } else {
 279             return $response->results;
 280         }
 281     }
 282 }
 283
 284 /**
 285  * @return List of information about file types based on extensions.
 286  *   Associative array of extension (lower-case) to associative array
 287  *   from 'element name' to data. Current element names are 'type' and 'icon'.
 288  *   Unknown types should use the 'xxx' entry which includes defaults.
 289  */
 290 function get_mimetypes_array() {
 291     return array (
 292         'xxx'  => array ('type'=>'document/unknown', 'icon'=>'unknown.gif'),
 293         '3gp'  => array ('type'=>'video/quicktime', 'icon'=>'video.gif'),
 294         'ai'   => array ('type'=>'application/postscript', 'icon'=>'image.gif'),
 295         'aif'  => array ('type'=>'audio/x-aiff', 'icon'=>'audio.gif'),
 296         'aiff' => array ('type'=>'audio/x-aiff', 'icon'=>'audio.gif'),
 297         'aifc' => array ('type'=>'audio/x-aiff', 'icon'=>'audio.gif'),
 298         'applescript'  => array ('type'=>'text/plain', 'icon'=>'text.gif'),
 299         'asc'  => array ('type'=>'text/plain', 'icon'=>'text.gif'),
 300         'asm'  => array ('type'=>'text/plain', 'icon'=>'text.gif'),
 301         'au'   => array ('type'=>'audio/au', 'icon'=>'audio.gif'),
 302         'avi'  => array ('type'=>'video/x-ms-wm', 'icon'=>'avi.gif'),
 303         'bmp'  => array ('type'=>'image/bmp', 'icon'=>'image.gif'),
 304         'c'    => array ('type'=>'text/plain', 'icon'=>'text.gif'),
 305         'cct'  => array ('type'=>'shockwave/director', 'icon'=>'flash.gif'),
 306         'cpp'  => array ('type'=>'text/plain', 'icon'=>'text.gif'),
 307         'cs'   => array ('type'=>'application/x-csh', 'icon'=>'text.gif'),
 308         'css'  => array ('type'=>'text/css', 'icon'=>'text.gif'),
 309         'csv'  => array ('type'=>'text/csv', 'icon'=>'excel.gif'),
 310         'dv'   => array ('type'=>'video/x-dv', 'icon'=>'video.gif'),
 311         'dmg'  => array ('type'=>'application/octet-stream', 'icon'=>'dmg.gif'),
 312         'doc'  => array ('type'=>'application/msword', 'icon'=>'word.gif'),
 313         'docx' => array ('type'=>'application/msword', 'icon'=>'docx.gif'),
 314         'docm' => array ('type'=>'application/msword', 'icon'=>'docm.gif'),
 315         'dotx' => array ('type'=>'application/msword', 'icon'=>'dotx.gif'),
 316         'dcr'  => array ('type'=>'application/x-director', 'icon'=>'flash.gif'),
 317         'dif'  => array ('type'=>'video/x-dv', 'icon'=>'video.gif'),
 318         'dir'  => array ('type'=>'application/x-director', 'icon'=>'flash.gif'),
 319         'dxr'  => array ('type'=>'application/x-director', 'icon'=>'flash.gif'),
 320         'eps'  => array ('type'=>'application/postscript', 'icon'=>'pdf.gif'),
 321         'fdf'  => array ('type'=>'application/pdf', 'icon'=>'pdf.gif'),
 322         'flv'  => array ('type'=>'video/x-flv', 'icon'=>'video.gif'),
 323         'gif'  => array ('type'=>'image/gif', 'icon'=>'image.gif'),
 324         'gtar' => array ('type'=>'application/x-gtar', 'icon'=>'zip.gif'),
 325         'tgz'  => array ('type'=>'application/g-zip', 'icon'=>'zip.gif'),
 326         'gz'   => array ('type'=>'application/g-zip', 'icon'=>'zip.gif'),
 327         'gzip' => array ('type'=>'application/g-zip', 'icon'=>'zip.gif'),
 328         'h'    => array ('type'=>'text/plain', 'icon'=>'text.gif'),
 329         'hpp'  => array ('type'=>'text/plain', 'icon'=>'text.gif'),
 330         'hqx'  => array ('type'=>'application/mac-binhex40', 'icon'=>'zip.gif'),
 331         'htc'  => array ('type'=>'text/x-component', 'icon'=>'text.gif'),
 332         'html' => array ('type'=>'text/html', 'icon'=>'html.gif'),
 333         'xhtml'=> array ('type'=>'application/xhtml+xml', 'icon'=>'html.gif'),
 334         'htm'  => array ('type'=>'text/html', 'icon'=>'html.gif'),
 335         'ico'  => array ('type'=>'image/vnd.microsoft.icon', 'icon'=>'image.gif'),
 336         'ics'  => array ('type'=>'text/calendar', 'icon'=>'text.gif'),
 337         'isf'  => array ('type'=>'application/inspiration', 'icon'=>'isf.gif'),
 338         'ist'  => array ('type'=>'application/inspiration.template', 'icon'=>'isf.gif'),
 339         'java' => array ('type'=>'text/plain', 'icon'=>'text.gif'),
 340         'jcb'  => array ('type'=>'text/xml', 'icon'=>'jcb.gif'),
 341         'jcl'  => array ('type'=>'text/xml', 'icon'=>'jcl.gif'),
 342         'jcw'  => array ('type'=>'text/xml', 'icon'=>'jcw.gif'),
 343         'jmt'  => array ('type'=>'text/xml', 'icon'=>'jmt.gif'),
 344         'jmx'  => array ('type'=>'text/xml', 'icon'=>'jmx.gif'),
 345         'jpe'  => array ('type'=>'image/jpeg', 'icon'=>'image.gif'),
 346         'jpeg' => array ('type'=>'image/jpeg', 'icon'=>'image.gif'),
 347         'jpg'  => array ('type'=>'image/jpeg', 'icon'=>'image.gif'),
 348         'jqz'  => array ('type'=>'text/xml', 'icon'=>'jqz.gif'),
 349         'js'   => array ('type'=>'application/x-javascript', 'icon'=>'text.gif'),
 350         'latex'=> array ('type'=>'application/x-latex', 'icon'=>'text.gif'),
 351         'm'    => array ('type'=>'text/plain', 'icon'=>'text.gif'),
 352         'mov'  => array ('type'=>'video/quicktime', 'icon'=>'video.gif'),
 353         'movie'=> array ('type'=>'video/x-sgi-movie', 'icon'=>'video.gif'),
 354         'm3u'  => array ('type'=>'audio/x-mpegurl', 'icon'=>'audio.gif'),
 355         'mp3'  => array ('type'=>'audio/mp3', 'icon'=>'audio.gif'),
 356         'mp4'  => array ('type'=>'video/mp4', 'icon'=>'video.gif'),
 357         'mpeg' => array ('type'=>'video/mpeg', 'icon'=>'video.gif'),
 358         'mpe'  => array ('type'=>'video/mpeg', 'icon'=>'video.gif'),
 359         'mpg'  => array ('type'=>'video/mpeg', 'icon'=>'video.gif'),
 360
 361         'odt'  => array ('type'=>'application/vnd.oasis.opendocument.text', 'icon'=>'odt.gif'),
 362         'ott'  => array ('type'=>'application/vnd.oasis.opendocument.text-template', 'icon'=>'odt.gif'),
 363         'oth'  => array ('type'=>'application/vnd.oasis.opendocument.text-web', 'icon'=>'odt.gif'),
 364         'odm'  => array ('type'=>'application/vnd.oasis.opendocument.text-master', 'icon'=>'odm.gif'),
 365         'odg'  => array ('type'=>'application/vnd.oasis.opendocument.graphics', 'icon'=>'odg.gif'),
 366         'otg'  => array ('type'=>'application/vnd.oasis.opendocument.graphics-template', 'icon'=>'odg.gif'),
 367         'odp'  => array ('type'=>'application/vnd.oasis.opendocument.presentation', 'icon'=>'odp.gif'),
 368         'otp'  => array ('type'=>'application/vnd.oasis.opendocument.presentation-template', 'icon'=>'odp.gif'),
 369         'ods'  => array ('type'=>'application/vnd.oasis.opendocument.spreadsheet', 'icon'=>'ods.gif'),
 370         'ots'  => array ('type'=>'application/vnd.oasis.opendocument.spreadsheet-template', 'icon'=>'ods.gif'),
 371         'odc'  => array ('type'=>'application/vnd.oasis.opendocument.chart', 'icon'=>'odc.gif'),
 372         'odf'  => array ('type'=>'application/vnd.oasis.opendocument.formula', 'icon'=>'odf.gif'),
 373         'odb'  => array ('type'=>'application/vnd.oasis.opendocument.database', 'icon'=>'odb.gif'),
 374         'odi'  => array ('type'=>'application/vnd.oasis.opendocument.image', 'icon'=>'odi.gif'),
 375
 376         'pct'  => array ('type'=>'image/pict', 'icon'=>'image.gif'),
 377         'pdf'  => array ('type'=>'application/pdf', 'icon'=>'pdf.gif'),
 378         'php'  => array ('type'=>'text/plain', 'icon'=>'text.gif'),
 379         'pic'  => array ('type'=>'image/pict', 'icon'=>'image.gif'),
 380         'pict' => array ('type'=>'image/pict', 'icon'=>'image.gif'),
 381         'png'  => array ('type'=>'image/png', 'icon'=>'image.gif'),
 382         'pps'  => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'powerpoint.gif'),
 383         'ppt'  => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'powerpoint.gif'),
 384         'pptx' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'pptx.gif'),
 385         'pptm' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'pptm.gif'),
 386         'potx' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'potx.gif'),
 387         'potm' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'potm.gif'),
 388         'ppam' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'ppam.gif'),
 389         'ppsx' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'ppsx.gif'),
 390         'ppsm' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'ppsm.gif'),
 391         'ps'   => array ('type'=>'application/postscript', 'icon'=>'pdf.gif'),
 392         'qt'   => array ('type'=>'video/quicktime', 'icon'=>'video.gif'),
 393         'ra'   => array ('type'=>'audio/x-realaudio', 'icon'=>'audio.gif'),
 394         'ram'  => array ('type'=>'audio/x-pn-realaudio', 'icon'=>'audio.gif'),
 395         'rhb'  => array ('type'=>'text/xml', 'icon'=>'xml.gif'),
 396         'rm'   => array ('type'=>'audio/x-pn-realaudio', 'icon'=>'audio.gif'),
 397         'rtf'  => array ('type'=>'text/rtf', 'icon'=>'text.gif'),
 398         'rtx'  => array ('type'=>'text/richtext', 'icon'=>'text.gif'),
 399         'sh'   => array ('type'=>'application/x-sh', 'icon'=>'text.gif'),
 400         'sit'  => array ('type'=>'application/x-stuffit', 'icon'=>'zip.gif'),
 401         'smi'  => array ('type'=>'application/smil', 'icon'=>'text.gif'),
 402         'smil' => array ('type'=>'application/smil', 'icon'=>'text.gif'),
 403         'sqt'  => array ('type'=>'text/xml', 'icon'=>'xml.gif'),
 404         'svg'  => array ('type'=>'image/svg+xml', 'icon'=>'image.gif'),
 405         'svgz' => array ('type'=>'image/svg+xml', 'icon'=>'image.gif'),
 406         'swa'  => array ('type'=>'application/x-director', 'icon'=>'flash.gif'),
 407         'swf'  => array ('type'=>'application/x-shockwave-flash', 'icon'=>'flash.gif'),
 408         'swfl' => array ('type'=>'application/x-shockwave-flash', 'icon'=>'flash.gif'),
 409
 410         'sxw'  => array ('type'=>'application/vnd.sun.xml.writer', 'icon'=>'odt.gif'),
 411         'stw'  => array ('type'=>'application/vnd.sun.xml.writer.template', 'icon'=>'odt.gif'),
 412         'sxc'  => array ('type'=>'application/vnd.sun.xml.calc', 'icon'=>'odt.gif'),
 413         'stc'  => array ('type'=>'application/vnd.sun.xml.calc.template', 'icon'=>'odt.gif'),
 414         'sxd'  => array ('type'=>'application/vnd.sun.xml.draw', 'icon'=>'odt.gif'),
 415         'std'  => array ('type'=>'application/vnd.sun.xml.draw.template', 'icon'=>'odt.gif'),
 416         'sxi'  => array ('type'=>'application/vnd.sun.xml.impress', 'icon'=>'odt.gif'),
 417         'sti'  => array ('type'=>'application/vnd.sun.xml.impress.template', 'icon'=>'odt.gif'),
 418         'sxg'  => array ('type'=>'application/vnd.sun.xml.writer.global', 'icon'=>'odt.gif'),
 419         'sxm'  => array ('type'=>'application/vnd.sun.xml.math', 'icon'=>'odt.gif'),
 420
 421         'tar'  => array ('type'=>'application/x-tar', 'icon'=>'zip.gif'),
 422         'tif'  => array ('type'=>'image/tiff', 'icon'=>'image.gif'),
 423         'tiff' => array ('type'=>'image/tiff', 'icon'=>'image.gif'),
 424         'tex'  => array ('type'=>'application/x-tex', 'icon'=>'text.gif'),
 425         'texi' => array ('type'=>'application/x-texinfo', 'icon'=>'text.gif'),
 426         'texinfo'  => array ('type'=>'application/x-texinfo', 'icon'=>'text.gif'),
 427         'tsv'  => array ('type'=>'text/tab-separated-values', 'icon'=>'text.gif'),
 428         'txt'  => array ('type'=>'text/plain', 'icon'=>'text.gif'),
 429         'wav'  => array ('type'=>'audio/wav', 'icon'=>'audio.gif'),
 430         'wmv'  => array ('type'=>'video/x-ms-wmv', 'icon'=>'avi.gif'),
 431         'asf'  => array ('type'=>'video/x-ms-asf', 'icon'=>'avi.gif'),
 432         'xdp'  => array ('type'=>'application/pdf', 'icon'=>'pdf.gif'),
 433         'xfd'  => array ('type'=>'application/pdf', 'icon'=>'pdf.gif'),
 434         'xfdf' => array ('type'=>'application/pdf', 'icon'=>'pdf.gif'),
 435         'xls'  => array ('type'=>'application/vnd.ms-excel', 'icon'=>'excel.gif'),
 436         'xlsx' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'xlsx.gif'),
 437         'xlsm' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'xlsm.gif'),
 438         'xltx' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'xltx.gif'),
 439         'xltm' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'xltm.gif'),
 440         'xlsb' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'xlsb.gif'),
 441         'xlam' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'xlam.gif'),
 442         'xml'  => array ('type'=>'application/xml', 'icon'=>'xml.gif'),
 443         'xsl'  => array ('type'=>'text/xml', 'icon'=>'xml.gif'),
 444         'zip'  => array ('type'=>'application/zip', 'icon'=>'zip.gif')
 445     );
 446 }
 447
 448 /**
 449  * Obtains information about a filetype based on its extension. Will
 450  * use a default if no information is present about that particular
 451  * extension.
 452  * @param string $element Desired information (usually 'icon'
 453  *   for icon filename or 'type' for MIME type)
 454  * @param string $filename Filename we're looking up
 455  * @return string Requested piece of information from array
 456  */
 457 function mimeinfo($element, $filename) {
 458     static $mimeinfo = null;
 459     if (is_null($mimeinfo)) {
 460         $mimeinfo = get_mimetypes_array();
 461     }
 462
 463     if (eregi('\.([a-z0-9]+)$', $filename, $match)) {
 464         if (isset($mimeinfo[strtolower($match[1])][$element])) {
 465             return $mimeinfo[strtolower($match[1])][$element];
 466         } else {
 467             return $mimeinfo['xxx'][$element];   // By default
 468         }
 469     } else {
 470         return $mimeinfo['xxx'][$element];   // By default
 471     }
 472 }
 473
 474 /**
 475  * Obtains information about a filetype based on the MIME type rather than
 476  * the other way around.
 477  * @param string $element Desired information (usually 'icon')
 478  * @param string $mimetype MIME type we're looking up
 479  * @return string Requested piece of information from array
 480  */
 481 function mimeinfo_from_type($element, $mimetype) {
 482     static $mimeinfo;
 483     $mimeinfo=get_mimetypes_array();
 484
 485     foreach($mimeinfo as $values) {
 486         if($values['type']==$mimetype) {
 487             if(isset($values[$element])) {
 488                 return $values[$element];
 489             }
 490             break;
 491         }
 492     }
 493     return $mimeinfo['xxx'][$element]; // Default
 494 }
 495
 496 /**
 497  * Get information about a filetype based on the icon file.
 498  * @param string $element Desired information (usually 'icon')
 499  * @param string $icon Icon file path.
 500  * @return string Requested piece of information from array
 501  */
 502 function mimeinfo_from_icon($element, $icon) {
 503     static $mimeinfo;
 504     $mimeinfo=get_mimetypes_array();
 505
 506     if (preg_match("/\/(.*)/", $icon, $matches)) {
 507         $icon = $matches[1];
 508     }
 509     $info = $mimeinfo['xxx'][$element]; // Default
 510     foreach($mimeinfo as $values) {
 511         if($values['icon']==$icon) {
 512             if(isset($values[$element])) {
 513                 $info = $values[$element];
 514             }
 515             //No break, for example for 'excel.gif' we don't want 'csv'!
 516         }
 517     }
 518     return $info;
 519 }
 520
 521 /**
 522  * Obtains descriptions for file types (e.g. 'Microsoft Word document') from the
 523  * mimetypes.php language file.
 524  * @param string $mimetype MIME type (can be obtained using the mimeinfo function)
 525  * @param bool $capitalise If true, capitalises first character of result
 526  * @return string Text description
 527  */
 528 function get_mimetype_description($mimetype,$capitalise=false) {
 529     $result=get_string($mimetype,'mimetypes');
 530     // Surrounded by square brackets indicates that there isn't a string for that
 531     // (maybe there is a better way to find this out?)
 532     if(strpos($result,'[')===0) {
 533         $result=get_string('document/unknown','mimetypes');
 534     }
 535     if($capitalise) {
 536         $result=ucfirst($result);
 537     }
 538     return $result;
 539 }
 540
 541 /**
 542  * Handles the sending of file data to the user's browser, including support for
 543  * byteranges etc.
 544  * @param string $path Path of file on disk (including real filename), or actual content of file as string
 545  * @param string $filename Filename to send
 546  * @param int $lifetime Number of seconds before the file should expire from caches (default 24 hours)
 547  * @param int $filter 0 (default)=no filtering, 1=all files, 2=html files only
 548  * @param bool $pathisstring If true (default false), $path is the content to send and not the pathname
 549  * @param bool $forcedownload If true (default false), forces download of file rather than view in browser/plugin
 550  * @param string $mimetype Include to specify the MIME type; leave blank to have it guess the type from $filename
 551  */
 552 function send_file($path, $filename, $lifetime=86400 , $filter=0, $pathisstring=false, $forcedownload=false, $mimetype='') {
 553     global $CFG, $COURSE;
 554
 555     // Use given MIME type if specified, otherwise guess it using mimeinfo.
 556     // IE, Konqueror and Opera open html file directly in browser from web even when directed to save it to disk :-O
 557     // only Firefox saves all files locally before opening when content-disposition: attachment stated
 558     $isFF         = check_browser_version('Firefox', '1.5'); // only FF > 1.5 properly tested
 559     $mimetype     = ($forcedownload and !$isFF) ? 'application/x-forcedownload' :
 560                          ($mimetype ? $mimetype : mimeinfo('type', $filename));
 561     $lastmodified = $pathisstring ? time() : filemtime($path);
 562     $filesize     = $pathisstring ? strlen($path) : filesize($path);
 563
 564 /* - MDL-13949
 565     //Adobe Acrobat Reader XSS prevention
 566     if ($mimetype=='application/pdf' or mimeinfo('type', $filename)=='application/pdf') {
 567         //please note that it prevents opening of pdfs in browser when http referer disabled
 568         //or file linked from another site; browser caching of pdfs is now disabled too
 569         if (!empty($_SERVER['HTTP_RANGE'])) {
 570             //already byteserving
 571             $lifetime = 1; // >0 needed for byteserving
 572         } else if (empty($_SERVER['HTTP_REFERER']) or strpos($_SERVER['HTTP_REFERER'], $CFG->wwwroot)!==0) {
 573             $mimetype = 'application/x-forcedownload';
 574             $forcedownload = true;
 575             $lifetime = 0;
 576         } else {
 577             $lifetime = 1; // >0 needed for byteserving
 578         }
 579     }
 580 */
 581
 582     //IE compatibiltiy HACK!
 583     if (ini_get('zlib.output_compression')) {
 584         ini_set('zlib.output_compression', 'Off');
 585     }
 586
 587     //try to disable automatic sid rewrite in cookieless mode
 588     @ini_set("session.use_trans_sid", "false");
 589
 590     //do not put '@' before the next header to detect incorrect moodle configurations,
 591     //error should be better than "weird" empty lines for admins/users
 592     //TODO: should we remove all those @ before the header()? Are all of the values supported on all servers?
 593     header('Last-Modified: '. gmdate('D, d M Y H:i:s', $lastmodified) .' GMT');
 594
 595     // if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup
 596     if (check_browser_version('MSIE')) {
 597         $filename = rawurlencode($filename);
 598     }
 599
 600     if ($forcedownload) {
 601         @header('Content-Disposition: attachment; filename="'.$filename.'"');
 602     } else {
 603         @header('Content-Disposition: inline; filename="'.$filename.'"');
 604     }
 605
 606     if ($lifetime > 0) {
 607         @header('Cache-Control: max-age='.$lifetime);
 608         @header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT');
 609         @header('Pragma: ');
 610
 611         if (empty($CFG->disablebyteserving) && !$pathisstring && $mimetype != 'text/plain' && $mimetype != 'text/html') {
 612
 613             @header('Accept-Ranges: bytes');
 614
 615             if (!empty($_SERVER['HTTP_RANGE']) && strpos($_SERVER['HTTP_RANGE'],'bytes=') !== FALSE) {
 616                 // byteserving stuff - for acrobat reader and download accelerators
 617                 // see: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35
 618                 // inspired by: http://www.coneural.org/florian/papers/04_byteserving.php
 619                 $ranges = false;
 620                 if (preg_match_all('/(\d*)-(\d*)/', $_SERVER['HTTP_RANGE'], $ranges, PREG_SET_ORDER)) {
 621                     foreach ($ranges as $key=>$value) {
 622                         if ($ranges[$key][1] == '') {
 623                             //suffix case
 624                             $ranges[$key][1] = $filesize - $ranges[$key][2];
 625                             $ranges[$key][2] = $filesize - 1;
 626                         } else if ($ranges[$key][2] == '' || $ranges[$key][2] > $filesize - 1) {
 627                             //fix range length
 628                             $ranges[$key][2] = $filesize - 1;
 629                         }
 630                         if ($ranges[$key][2] != '' && $ranges[$key][2] < $ranges[$key][1]) {
 631                             //invalid byte-range ==> ignore header
 632                             $ranges = false;
 633                             break;
 634                         }
 635                         //prepare multipart header
 636                         $ranges[$key][0] =  "\r\n--".BYTESERVING_BOUNDARY."\r\nContent-Type: $mimetype\r\n";
 637                         $ranges[$key][0] .= "Content-Range: bytes {$ranges[$key][1]}-{$ranges[$key][2]}/$filesize\r\n\r\n";
 638                     }
 639                 } else {
 640                     $ranges = false;
 641                 }
 642                 if ($ranges) {
 643                     byteserving_send_file($path, $mimetype, $ranges);
 644                 }
 645             }
 646         } else {
 647             /// Do not byteserve (disabled, strings, text and html files).
 648             @header('Accept-Ranges: none');
 649         }
 650     } else { // Do not cache files in proxies and browsers
 651         if (strpos($CFG->wwwroot, 'https://') === 0) { //https sites - watch out for IE! KB812935 and KB316431
 652             @header('Cache-Control: max-age=10');
 653             @header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT');
 654             @header('Pragma: ');
 655         } else { //normal http - prevent caching at all cost
 656             @header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
 657             @header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT');
 658             @header('Pragma: no-cache');
 659         }
 660         @header('Accept-Ranges: none'); // Do not allow byteserving when caching disabled
 661     }
 662
 663     if (empty($filter)) {
 664         if ($mimetype == 'text/html' && !empty($CFG->usesid) && empty($_COOKIE['MoodleSession'.$CFG->sessioncookie])) {
 665             //cookieless mode - rewrite links
 666             @header('Content-Type: text/html');
 667             $path = $pathisstring ? $path : implode('', file($path));
 668             $path = sid_ob_rewrite($path);
 669             $filesize = strlen($path);
 670             $pathisstring = true;
 671         } else if ($mimetype == 'text/plain') {
 672             @header('Content-Type: Text/plain; charset=utf-8'); //add encoding
 673         } else {
 674             @header('Content-Type: '.$mimetype);
 675         }
 676         @header('Content-Length: '.$filesize);
 677         while (@ob_end_flush()); //flush the buffers - save memory and disable sid rewrite
 678         if ($pathisstring) {
 679             echo $path;
 680         } else {
 681             readfile_chunked($path);
 682         }
 683     } else {     // Try to put the file through filters
 684         if ($mimetype == 'text/html') {
 685             $options = new object();
 686             $options->noclean = true;
 687             $options->nocache = true; // temporary workaround for MDL-5136
 688             $text = $pathisstring ? $path : implode('', file($path));
 689
 690             $text = file_modify_html_header($text);
 691             $output = format_text($text, FORMAT_HTML, $options, $COURSE->id);
 692             if (!empty($CFG->usesid) && empty($_COOKIE['MoodleSession'.$CFG->sessioncookie])) {
 693                 //cookieless mode - rewrite links
 694                 $output = sid_ob_rewrite($output);
 695             }
 696
 697             @header('Content-Length: '.strlen($output));
 698             @header('Content-Type: text/html');
 699             while (@ob_end_flush()); //flush the buffers - save memory and disable sid rewrite
 700             echo $output;
 701         // only filter text if filter all files is selected
 702         } else if (($mimetype == 'text/plain') and ($filter == 1)) {
 703             $options = new object();
 704             $options->newlines = false;
 705             $options->noclean = true;
 706             $text = htmlentities($pathisstring ? $path : implode('', file($path)));
 707             $output = '<pre>'. format_text($text, FORMAT_MOODLE, $options, $COURSE->id) .'</pre>';
 708             if (!empty($CFG->usesid) && empty($_COOKIE['MoodleSession'.$CFG->sessioncookie])) {
 709                 //cookieless mode - rewrite links
 710                 $output = sid_ob_rewrite($output);
 711             }
 712
 713             @header('Content-Length: '.strlen($output));
 714             @header('Content-Type: text/html; charset=utf-8'); //add encoding
 715             while (@ob_end_flush()); //flush the buffers - save memory and disable sid rewrite
 716             echo $output;
 717         } else {    // Just send it out raw
 718             @header('Content-Length: '.$filesize);
 719             @header('Content-Type: '.$mimetype);
 720             while (@ob_end_flush()); //flush the buffers - save memory and disable sid rewrite
 721             if ($pathisstring) {
 722                 echo $path;
 723             }else {
 724                 readfile_chunked($path);
 725             }
 726         }
 727     }
 728     die; //no more chars to output!!!
 729 }
 730
 731 function get_records_csv($file, $table) {
 732     global $CFG, $db;
 733
 734     if (!$metacolumns = $db->MetaColumns($CFG->prefix . $table)) {
 735         return false;
 736     }
 737
 738     if(!($handle = @fopen($file, 'r'))) {
 739         error('get_records_csv failed to open '.$file);
 740     }
 741
 742     $fieldnames = fgetcsv($handle, 4096);
 743     if(empty($fieldnames)) {
 744         fclose($handle);
 745         return false;
 746     }
 747
 748     $columns = array();
 749
 750     foreach($metacolumns as $metacolumn) {
 751         $ord = array_search($metacolumn->name, $fieldnames);
 752         if(is_int($ord)) {
 753             $columns[$metacolumn->name] = $ord;
 754         }
 755     }
 756
 757     $rows = array();
 758
 759     while (($data = fgetcsv($handle, 4096)) !== false) {
 760         $item = new stdClass;
 761         foreach($columns as $name => $ord) {
 762             $item->$name = $data[$ord];
 763         }
 764         $rows[] = $item;
 765     }
 766
 767     fclose($handle);
 768     return $rows;
 769 }
 770
 771 function put_records_csv($file, $records, $table = NULL) {
 772     global $CFG, $db;
 773
 774     if (empty($records)) {
 775         return true;
 776     }
 777
 778     $metacolumns = NULL;
 779     if ($table !== NULL && !$metacolumns = $db->MetaColumns($CFG->prefix . $table)) {
 780         return false;
 781     }
 782
 783     echo "x";
 784
 785     if(!($fp = @fopen($CFG->dataroot.'/temp/'.$file, 'w'))) {
 786         error('put_records_csv failed to open '.$file);
 787     }
 788
 789     $proto = reset($records);
 790     if(is_object($proto)) {
 791         $fields_records = array_keys(get_object_vars($proto));
 792     }
 793     else if(is_array($proto)) {
 794         $fields_records = array_keys($proto);
 795     }
 796     else {
 797         return false;
 798     }
 799     echo "x";
 800
 801     if(!empty($metacolumns)) {
 802         $fields_table = array_map(create_function('$a', 'return $a->name;'), $metacolumns);
 803         $fields = array_intersect($fields_records, $fields_table);
 804     }
 805     else {
 806         $fields = $fields_records;
 807     }
 808
 809     fwrite($fp, implode(',', $fields));
 810     fwrite($fp, "\r\n");
 811
 812     foreach($records as $record) {
 813         $array  = (array)$record;
 814         $values = array();
 815         foreach($fields as $field) {
 816             if(strpos($array[$field], ',')) {
 817                 $values[] = '"'.str_replace('"', '\"', $array[$field]).'"';
 818             }
 819             else {
 820                 $values[] = $array[$field];
 821             }
 822         }
 823         fwrite($fp, implode(',', $values)."\r\n");
 824     }
 825
 826     fclose($fp);
 827     return true;
 828 }
 829
 830
 831 /**
 832  * Recursively delete the file or folder with path $location. That is,
 833  * if it is a file delete it. If it is a folder, delete all its content
 834  * then delete it. If $location does not exist to start, that is not
 835  * considered an error.
 836  *
 837  * @param $location the path to remove.
 838  */
 839 function fulldelete($location) {
 840     if (is_dir($location)) {
 841         $currdir = opendir($location);
 842         while (false !== ($file = readdir($currdir))) {
 843             if ($file <> ".." && $file <> ".") {
 844                 $fullfile = $location."/".$file;
 845                 if (is_dir($fullfile)) {
 846                     if (!fulldelete($fullfile)) {
 847                         return false;
 848                     }
 849                 } else {
 850                     if (!unlink($fullfile)) {
 851                         return false;
 852                     }
 853                 }
 854             }
 855         }
 856         closedir($currdir);
 857         if (! rmdir($location)) {
 858             return false;
 859         }
 860
 861     } else if (file_exists($location)) {
 862         if (!unlink($location)) {
 863             return false;
 864         }
 865     }
 866     return true;
 867 }
 868
 869 /**
 870  * Improves memory consumptions and works around buggy readfile() in PHP 5.0.4 (2MB readfile limit).
 871  */
 872 function readfile_chunked($filename, $retbytes=true) {
 873     $chunksize = 1*(1024*1024); // 1MB chunks - must be less than 2MB!
 874     $buffer = '';
 875     $cnt =0;
 876     $handle = fopen($filename, 'rb');
 877     if ($handle === false) {
 878         return false;
 879     }
 880
 881     while (!feof($handle)) {
 882         @set_time_limit(60*60); //reset time limit to 60 min - should be enough for 1 MB chunk
 883         $buffer = fread($handle, $chunksize);
 884         echo $buffer;
 885         flush();
 886         if ($retbytes) {
 887             $cnt += strlen($buffer);
 888         }
 889     }
 890     $status = fclose($handle);
 891     if ($retbytes && $status) {
 892         return $cnt; // return num. bytes delivered like readfile() does.
 893     }
 894     return $status;
 895 }
 896
 897 /**
 898  * Send requested byterange of file.
 899  */
 900 function byteserving_send_file($filename, $mimetype, $ranges) {
 901     $chunksize = 1*(1024*1024); // 1MB chunks - must be less than 2MB!
 902     $handle = fopen($filename, 'rb');
 903     if ($handle === false) {
 904         die;
 905     }
 906     if (count($ranges) == 1) { //only one range requested
 907         $length = $ranges[0][2] - $ranges[0][1] + 1;
 908         @header('HTTP/1.1 206 Partial content');
 909         @header('Content-Length: '.$length);
 910         @header('Content-Range: bytes '.$ranges[0][1].'-'.$ranges[0][2].'/'.filesize($filename));
 911         @header('Content-Type: '.$mimetype);
 912         while (@ob_end_flush()); //flush the buffers - save memory and disable sid rewrite
 913         $buffer = '';
 914         fseek($handle, $ranges[0][1]);
 915         while (!feof($handle) && $length > 0) {
 916             @set_time_limit(60*60); //reset time limit to 60 min - should be enough for 1 MB chunk
 917             $buffer = fread($handle, ($chunksize < $length ? $chunksize : $length));
 918             echo $buffer;
 919             flush();
 920             $length -= strlen($buffer);
 921         }
 922         fclose($handle);
 923         die;
 924     } else { // multiple ranges requested - not tested much
 925         $totallength = 0;
 926         foreach($ranges as $range) {
 927             $totallength += strlen($range[0]) + $range[2] - $range[1] + 1;
 928         }
 929         $totallength += strlen("\r\n--".BYTESERVING_BOUNDARY."--\r\n");
 930         @header('HTTP/1.1 206 Partial content');
 931         @header('Content-Length: '.$totallength);
 932         @header('Content-Type: multipart/byteranges; boundary='.BYTESERVING_BOUNDARY);
 933         //TODO: check if "multipart/x-byteranges" is more compatible with current readers/browsers/servers
 934         while (@ob_end_flush()); //flush the buffers - save memory and disable sid rewrite
 935         foreach($ranges as $range) {
 936             $length = $range[2] - $range[1] + 1;
 937             echo $range[0];
 938             $buffer = '';
 939             fseek($handle, $range[1]);
 940             while (!feof($handle) && $length > 0) {
 941                 @set_time_limit(60*60); //reset time limit to 60 min - should be enough for 1 MB chunk
 942                 $buffer = fread($handle, ($chunksize < $length ? $chunksize : $length));
 943                 echo $buffer;
 944                 flush();
 945                 $length -= strlen($buffer);
 946             }
 947         }
 948         echo "\r\n--".BYTESERVING_BOUNDARY."--\r\n";
 949         fclose($handle);
 950         die;
 951     }
 952 }
 953
 954 /**
 955  * add includes (js and css) into uploaded files
 956  * before returning them, useful for themes and utf.js includes
 957  * @param string text - text to search and replace
 958  * @return string - text with added head includes
 959  */
 960 function file_modify_html_header($text) {
 961     // first look for <head> tag
 962     global $CFG;
 963
 964     $stylesheetshtml = '';
 965     foreach ($CFG->stylesheets as $stylesheet) {
 966         $stylesheetshtml .= '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'" />'."\n";
 967     }
 968
 969     $filters = explode(",", $CFG->textfilters);
 970     if (in_array('filter/mediaplugin', $filters)) {
 971         // this script is needed by most media filter plugins.
 972         $ufo = "\n".'<script type="text/javascript" src="'.$CFG->wwwroot.'/lib/ufo.js"></script>'."\n";
 973     } else {
 974         $ufo = '';
 975     }
 976
 977     preg_match('/\<head\>|\<HEAD\>/', $text, $matches);
 978     if ($matches) {
 979         $replacement = '<head>'.$ufo.$stylesheetshtml;
 980         $text = preg_replace('/\<head\>|\<HEAD\>/', $replacement, $text, 1);
 981         return $text;
 982     }
 983
 984     // if not, look for <html> tag, and stick <head> right after
 985     preg_match('/\<html\>|\<HTML\>/', $text, $matches);
 986     if ($matches) {
 987         // replace <html> tag with <html><head>includes</head>
 988         $replacement = '<html>'."\n".'<head>'.$ufo.$stylesheetshtml.'</head>';
 989         $text = preg_replace('/\<html\>|\<HTML\>/', $replacement, $text, 1);
 990         return $text;
 991     }
 992
 993     // if not, look for <body> tag, and stick <head> before body
 994     preg_match('/\<body\>|\<BODY\>/', $text, $matches);
 995     if ($matches) {
 996         $replacement = '<head>'.$ufo.$stylesheetshtml.'</head>'."\n".'<body>';
 997         $text = preg_replace('/\<body\>|\<BODY\>/', $replacement, $text, 1);
 998         return $text;
 999     }
1000
1001     // if not, just stick a <head> tag at the beginning
1002     $text = '<head>'.$ufo.$stylesheetshtml.'</head>'."\n".$text;
1003     return $text;
1004 }
1005
1006 ?>