includes/OutputPage.php

   1 <?php
   2 # See design.doc
   3
   4 if($wgUseTeX) include_once( "Math.php" );
   5
   6 class OutputPage {
   7         var $mHeaders, $mCookies, $mMetatags, $mKeywords;
   8         var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
   9         var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
  10         var $mSubtitle, $mRedirect, $mHeadtext;
  11         var $mLastModified, $mCategoryLinks;
  12
  13         var $mSuppressQuickbar;
  14         var $mOnloadHandler;
  15         var $mDoNothing;
  16         var $mContainsOldMagic, $mContainsNewMagic;
  17         var $mIsArticleRelated;
  18         var $mParserOptions;
  19
  20         function OutputPage()
  21         {
  22                 $this->mHeaders = $this->mCookies = $this->mMetatags =
  23                 $this->mKeywords = $this->mLinktags = array();
  24                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  25                 $this->mRedirect = $this->mLastModified =
  26                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  27                 $this->mOnloadHandler = "";
  28                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  29                 $this->mSuppressQuickbar = $this->mPrintable = false;
  30                 $this->mLanguageLinks = array();
  31                 $this->mCategoryLinks = array() ;
  32                 $this->mDoNothing = false;
  33                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  34                 $this->mParserOptions = ParserOptions::newFromUser( $temp = NULL );
  35         }
  36
  37         function addHeader( $name, $val ) { array_push( $this->mHeaders, "$name: $val" ) ; }
  38         function addCookie( $name, $val ) { array_push( $this->mCookies, array( $name, $val ) ); }
  39         function redirect( $url, $responsecode = '302' ) { $this->mRedirect = $url; $this->mRedirectCode = $responsecode; }
  40
  41         # To add an http-equiv meta tag, precede the name with "http:"
  42         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  43         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  44         function addLink( $rel, $rev, $target ) { array_push( $this->mLinktags, array( $rel, $rev, $target ) ); }
  45
  46         # checkLastModified tells the client to use the client-cached page if
  47         # possible. If sucessful, the OutputPage is disabled so that
  48         # any future call to OutputPage->output() have no effect. The method
  49         # returns true iff cache-ok headers was sent.
  50         function checkLastModified ( $timestamp )
  51         {
  52                 global $wgLang, $wgCachePages, $wgUser;
  53                 if( !$wgCachePages ) {
  54                         wfDebug( "CACHE DISABLED\n", false );
  55                         return;
  56                 }
  57                 if( preg_match( '/MSIE ([1-4]|5\.0)/', $_SERVER["HTTP_USER_AGENT"] ) ) {
  58                         # IE 5.0 has probs with our caching
  59                         wfDebug( "-- bad client, not caching\n", false );
  60                         return;
  61                 }
  62                 if( $wgUser->getOption( "nocache" ) ) {
  63                         wfDebug( "USER DISABLED CACHE\n", false );
  64                         return;
  65                 }
  66
  67                 $lastmod = gmdate( "D, j M Y H:i:s", wfTimestamp2Unix(
  68                         max( $timestamp, $wgUser->mTouched ) ) ) . " GMT";
  69
  70                 if( !empty( $_SERVER["HTTP_IF_MODIFIED_SINCE"] ) ) {
  71                         # IE sends sizes after the date like this:
  72                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
  73                         # this breaks strtotime().
  74                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
  75                         $ismodsince = wfUnix2Timestamp( strtotime( $modsince ) );
  76                         wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
  77                         wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
  78
  79                         if( ($ismodsince >= $timestamp ) and $wgUser->validateCache( $ismodsince ) ) {
  80                                 # Make sure you're in a place you can leave when you call us!
  81                                 header( "HTTP/1.0 304 Not Modified" );
  82                                 $this->mLastModified = $lastmod;
  83                                 $this->sendCacheControl();
  84                                 wfDebug( "CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
  85                                 $this->disable();
  86                                 return true;
  87                         } else {
  88                                 wfDebug( "READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
  89                                 $this->mLastModified = $lastmod;
  90                         }
  91                 } else {
  92                         wfDebug( "We're confused.\n", false );
  93                         $this->mLastModified = $lastmod;
  94                 }
  95         }
  96
  97         function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
  98         function setHTMLtitle( $name ) { $this->mHTMLtitle = $name; }
  99         function setPageTitle( $name ) { $this->mPagetitle = $name; }
 100         function getPageTitle() { return $this->mPagetitle; }
 101         function setSubtitle( $str ) { $this->mSubtitle = $str; }
 102         function getSubtitle() { return $this->mSubtitle; }
 103         function isArticle() { return $this->mIsarticle; }
 104         function setPrintable() { $this->mPrintable = true; }
 105         function isPrintable() { return $this->mPrintable; }
 106         function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 107         function getOnloadHandler() { return $this->mOnloadHandler; }
 108         function disable() { $this->mDoNothing = true; }
 109
 110         function setArticleRelated( $v )
 111         {
 112                 $this->mIsArticleRelated = $v;
 113                 if ( !$v ) {
 114                         $this->mIsarticle = false;
 115                 }
 116         }
 117         function setArticleFlag( $v ) {
 118                 $this->mIsarticle = $v;
 119                 if ( $v ) {
 120                         $this->mIsArticleRelated = $v;
 121                 }
 122         }
 123
 124         function isArticleRelated()
 125         {
 126                 return $this->mIsArticleRelated;
 127         }
 128
 129         function getLanguageLinks() {
 130                 global $wgTitle, $wgLanguageCode;
 131                 global $wgDBconnection, $wgDBname;
 132                 return $this->mLanguageLinks;
 133         }
 134         function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 135         function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 136
 137         function addHTML( $text ) { $this->mBodytext .= $text; }
 138         function addHeadtext( $text ) { $this->mHeadtext .= $text; }
 139         function debug( $text ) { $this->mDebugtext .= $text; }
 140
 141         function setParserOptions( $options )
 142         {
 143                 return wfSetVar( $this->mParserOptions, $options );
 144         }
 145
 146         # First pass--just handle <nowiki> sections, pass the rest off
 147         # to doWikiPass2() which does all the real work.
 148         #
 149         # $cacheArticle - assume this text is the main text for the given article
 150         #
 151         function addWikiText( $text, $linestart = true, $cacheArticle = NULL )
 152         {
 153                 global $wgParser, $wgParserCache, $wgUser, $wgTitle;
 154
 155                 $parserOutput = false;
 156                 if ( $cacheArticle ) {
 157                         $parserOutput = $wgParserCache->get( $cacheArticle, $wgUser );
 158                 }
 159
 160                 if ( $parserOutput === false ) {
 161                         $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 162                         if ( $cacheArticle ) {
 163                                 $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
 164                         }
 165                 }
 166
 167                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 168                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 169
 170                 $this->addHTML( $parserOutput->getText() );
 171
 172         }
 173
 174         # Set the maximum cache time on the Squid in seconds
 175         function setSquidMaxage( $maxage ) {
 176                 global $wgSquidMaxage;
 177                 $wgSquidMaxage = $maxage;
 178         }
 179
 180         function sendCacheControl() {
 181                 global $wgUseSquid, $wgUseESI, $wgSquidMaxage;
 182                 # FIXME: This header may cause trouble with some versions of Internet Explorer
 183                 header( "Vary: Accept-Encoding, Cookie" );
 184                 if( $this->mLastModified != "" ) {
 185                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( "session.name") ] ) &&
 186                           ! $this->isPrintable() )
 187                         {
 188                                 if ( $wgUseESI ) {
 189                                         # We'll purge the proxy cache explicitly, but require end user agents
 190                                         # to revalidate against the proxy on each visit.
 191                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 192                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 193                                         # start with a shorter timeout for initial testing
 194                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 195                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$wgSquidMaxage.', content="ESI/1.0"');
 196                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 197                                 } else {
 198                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 199                                         # to revalidate against the proxy on each visit.
 200                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 201                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 202                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 203                                         # start with a shorter timeout for initial testing
 204                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 205                                         header( 'Cache-Control: s-maxage='.$wgSquidMaxage.', must-revalidate, max-age=0' );
 206                                 }
 207                         } else {
 208                                 # We do want clients to cache if they can, but they *must* check for updates
 209                                 # on revisiting the page.
 210                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 211                                 header( "Expires: -1" );
 212                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 213                         }
 214                         header( "Last-modified: {$this->mLastModified}" );
 215                 } else {
 216                         wfDebug( "** no caching **\n", false );
 217                         header( "Expires: -1" );
 218                         header( "Cache-Control: no-cache" );
 219                         header( "Pragma: no-cache" );
 220                         header( "Last-modified: " . gmdate( "D, j M Y H:i:s" ) . " GMT" );
 221                 }
 222         }
 223
 224         # Finally, all the text has been munged and accumulated into
 225         # the object, let's actually output it:
 226         #
 227         function output()
 228         {
 229                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 230                 global $wgInputEncoding, $wgOutputEncoding, $wgLanguageCode;
 231                 global $wgDebugRedirects;
 232                 if( $this->mDoNothing ){
 233                         return;
 234                 }
 235                 $fname = "OutputPage::output";
 236                 wfProfileIn( $fname );
 237
 238                 $sk = $wgUser->getSkin();
 239
 240                 if ( "" != $this->mRedirect ) {
 241                         if( substr( $this->mRedirect, 0, 4 ) != "http" ) {
 242                                 # Standards require redirect URLs to be absolute
 243                                 global $wgServer;
 244                                 $this->mRedirect = $wgServer . $this->mRedirect;
 245                         }
 246                         if( $this->mRedirectCode == '301') {
 247                                 if( !$wgDebugRedirects ) {
 248                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 249                                 }
 250                                 $this->mLastModified = gmdate( "D, j M Y H:i:s" ) . " GMT";
 251                         }
 252
 253                         $this->sendCacheControl();
 254
 255                         if( $wgDebugRedirects ) {
 256                                 $url = htmlspecialchars( $this->mRedirect );
 257                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 258                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 259                                 print "</body>\n</html>\n";
 260                         } else {
 261                                 header( "Location: {$this->mRedirect}" );
 262                         }
 263                         return;
 264                 }
 265
 266
 267                 $this->sendCacheControl();
 268
 269                 header( "Content-type: text/html; charset={$wgOutputEncoding}" );
 270                 header( "Content-language: {$wgLanguageCode}" );
 271
 272                 $exp = time() + $wgCookieExpiration;
 273                 foreach( $this->mCookies as $name => $val ) {
 274                         setcookie( $name, $val, $exp, "/" );
 275                 }
 276
 277                 $sk->outputPage( $this );
 278                 # flush();
 279         }
 280
 281         function out( $ins )
 282         {
 283                 global $wgInputEncoding, $wgOutputEncoding, $wgLang;
 284                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 285                         $outs = $ins;
 286                 } else {
 287                         $outs = $wgLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 288                         if ( false === $outs ) { $outs = $ins; }
 289                 }
 290                 print $outs;
 291         }
 292
 293         function setEncodings()
 294         {
 295                 global $wgInputEncoding, $wgOutputEncoding;
 296                 global $wgUser, $wgLang;
 297
 298                 $wgInputEncoding = strtolower( $wgInputEncoding );
 299
 300                 if( $wgUser->getOption( 'altencoding' ) ) {
 301                         $wgLang->setAltEncoding();
 302                         return;
 303                 }
 304
 305                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 306                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 307                         return;
 308                 }
 309
 310                 /*
 311                 # This code is unused anyway!
 312                 # Commenting out. --bv 2003-11-15
 313
 314                 $a = explode( ",", $_SERVER['HTTP_ACCEPT_CHARSET'] );
 315                 $best = 0.0;
 316                 $bestset = "*";
 317
 318                 foreach ( $a as $s ) {
 319                         if ( preg_match( "/(.*);q=(.*)/", $s, $m ) ) {
 320                                 $set = $m[1];
 321                                 $q = (float)($m[2]);
 322                         } else {
 323                                 $set = $s;
 324                                 $q = 1.0;
 325                         }
 326                         if ( $q > $best ) {
 327                                 $bestset = $set;
 328                                 $best = $q;
 329                         }
 330                 }
 331                 #if ( "*" == $bestset ) { $bestset = "iso-8859-1"; }
 332                 if ( "*" == $bestset ) { $bestset = $wgOutputEncoding; }
 333                 $wgOutputEncoding = strtolower( $bestset );
 334
 335 # Disable for now
 336 #
 337                 */
 338                 $wgOutputEncoding = $wgInputEncoding;
 339         }
 340
 341         # Returns a HTML comment with the elapsed time since request.
 342         # This method has no side effects.
 343         function reportTime()
 344         {
 345                 global $wgRequestTime;
 346
 347                 $now = wfTime();
 348                 list( $usec, $sec ) = explode( " ", $wgRequestTime );
 349                 $start = (float)$sec + (float)$usec;
 350                 $elapsed = $now - $start;
 351                 $com = sprintf( "<!-- Time since request: %01.2f secs. -->",
 352                   $elapsed );
 353                 return $com;
 354         }
 355
 356         # Note: these arguments are keys into wfMsg(), not text!
 357         #
 358         function errorpage( $title, $msg )
 359         {
 360                 global $wgTitle;
 361
 362                 $this->mDebugtext .= "Original title: " .
 363                   $wgTitle->getPrefixedText() . "\n";
 364                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 365                 $this->setPageTitle( wfMsg( $title ) );
 366                 $this->setRobotpolicy( "noindex,nofollow" );
 367                 $this->setArticleRelated( false );
 368
 369                 $this->mBodytext = "";
 370                 $this->addHTML( "<p>" . wfMsg( $msg ) . "\n" );
 371                 $this->returnToMain( false );
 372
 373                 $this->output();
 374                 wfAbruptExit();
 375         }
 376
 377         function sysopRequired()
 378         {
 379                 global $wgUser;
 380
 381                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 382                 $this->setPageTitle( wfMsg( "sysoptitle" ) );
 383                 $this->setRobotpolicy( "noindex,nofollow" );
 384                 $this->setArticleRelated( false );
 385                 $this->mBodytext = "";
 386
 387                 $sk = $wgUser->getSkin();
 388                 $ap = $sk->makeKnownLink( wfMsg( "administrators" ), "" );
 389                 $this->addHTML( wfMsg( "sysoptext", $ap ) );
 390                 $this->returnToMain();
 391         }
 392
 393         function developerRequired()
 394         {
 395                 global $wgUser;
 396
 397                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 398                 $this->setPageTitle( wfMsg( "developertitle" ) );
 399                 $this->setRobotpolicy( "noindex,nofollow" );
 400                 $this->setArticleRelated( false );
 401                 $this->mBodytext = "";
 402
 403                 $sk = $wgUser->getSkin();
 404                 $ap = $sk->makeKnownLink( wfMsg( "administrators" ), "" );
 405                 $this->addHTML( wfMsg( "developertext", $ap ) );
 406                 $this->returnToMain();
 407         }
 408
 409         function loginToUse()
 410         {
 411                 global $wgUser, $wgTitle, $wgLang;
 412
 413                 $this->setHTMLTitle( wfMsg( "errorpagetitle" ) );
 414                 $this->setPageTitle( wfMsg( "loginreqtitle" ) );
 415                 $this->setRobotpolicy( "noindex,nofollow" );
 416                 $this->setArticleFlag( false );
 417                 $this->mBodytext = "";
 418                 $this->addWikiText( wfMsg( "loginreqtext" ) );
 419
 420                 # We put a comment in the .html file so a Sysop can diagnose the page the
 421                 # user can't see.
 422                 $this->addHTML( "\n<!--" .
 423                                                 $wgLang->getNsText( $wgTitle->getNamespace() ) .
 424                                                 ":" .
 425                                                 $wgTitle->getDBkey() . "-->" );
 426                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 427         }
 428
 429         function databaseError( $fname, &$conn )
 430         {
 431                 global $wgUser, $wgCommandLineMode;
 432
 433                 $this->setPageTitle( wfMsgNoDB( "databaseerror" ) );
 434                 $this->setRobotpolicy( "noindex,nofollow" );
 435                 $this->setArticleRelated( false );
 436
 437                 if ( $wgCommandLineMode ) {
 438                         $msg = wfMsgNoDB( "dberrortextcl" );
 439                 } else {
 440                         $msg = wfMsgNoDB( "dberrortext" );
 441                 }
 442
 443                 $msg = str_replace( "$1", htmlspecialchars( $conn->lastQuery() ), $msg );
 444                 $msg = str_replace( "$2", htmlspecialchars( $fname ), $msg );
 445                 $msg = str_replace( "$3", $conn->lastErrno(), $msg );
 446                 $msg = str_replace( "$4", htmlspecialchars( $conn->lastError() ), $msg );
 447
 448                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 449                         print "$msg\n";
 450                         wfAbruptExit();
 451                 }
 452                 $sk = $wgUser->getSkin();
 453                 $shlink = $sk->makeKnownLink( wfMsgNoDB( "searchhelppage" ),
 454                   wfMsgNoDB( "searchingwikipedia" ) );
 455                 $msg = str_replace( "$5", $shlink, $msg );
 456                 $this->mBodytext = $msg;
 457                 $this->output();
 458                 wfAbruptExit();
 459         }
 460
 461         function readOnlyPage( $source = "", $protected = false )
 462         {
 463                 global $wgUser, $wgReadOnlyFile;
 464
 465                 $this->setRobotpolicy( "noindex,nofollow" );
 466                 $this->setArticleRelated( false );
 467
 468                 if( $protected ) {
 469                         $this->setPageTitle( wfMsg( "viewsource" ) );
 470                         $this->addWikiText( wfMsg( "protectedtext" ) );
 471                 } else {
 472                         $this->setPageTitle( wfMsg( "readonly" ) );
 473                         $reason = file_get_contents( $wgReadOnlyFile );
 474                         $this->addHTML( wfMsg( "readonlytext", $reason ) );
 475                 }
 476
 477                 if($source) {
 478                         $rows = $wgUser->getOption( "rows" );
 479                         $cols = $wgUser->getOption( "cols" );
 480                         $text .= "</p>\n<textarea cols='$cols' rows='$rows' readonly>" .
 481                                 htmlspecialchars( $source ) . "\n</textarea>";
 482                         $this->addHTML( $text );
 483                 }
 484
 485                 $this->returnToMain( false );
 486         }
 487
 488         function fatalError( $message )
 489         {
 490                 $this->setPageTitle( wfMsg( "internalerror" ) );
 491                 $this->setRobotpolicy( "noindex,nofollow" );
 492                 $this->setArticleRelated( false );
 493
 494                 $this->mBodytext = $message;
 495                 $this->output();
 496                 wfAbruptExit();
 497         }
 498
 499         function unexpectedValueError( $name, $val )
 500         {
 501                 $this->fatalError( wfMsg( "unexpected", $name, $val ) );
 502         }
 503
 504         function fileCopyError( $old, $new )
 505         {
 506                 $this->fatalError( wfMsg( "filecopyerror", $old, $new ) );
 507         }
 508
 509         function fileRenameError( $old, $new )
 510         {
 511                 $this->fatalError( wfMsg( "filerenameerror", $old, $new ) );
 512         }
 513
 514         function fileDeleteError( $name )
 515         {
 516                 $this->fatalError( wfMsg( "filedeleteerror", $name ) );
 517         }
 518
 519         function fileNotFoundError( $name )
 520         {
 521                 $this->fatalError( wfMsg( "filenotfound", $name ) );
 522         }
 523
 524         function returnToMain( $auto = true )
 525         {
 526                 global $wgUser, $wgOut, $returnto;
 527
 528                 $sk = $wgUser->getSkin();
 529                 if ( "" == $returnto ) {
 530                         $returnto = wfMsg( "mainpage" );
 531                 }
 532                 $link = $sk->makeKnownLink( $returnto, "" );
 533
 534                 $r = wfMsg( "returnto", $link );
 535                 if ( $auto ) {
 536                         $titleObj = Title::newFromText( $returnto );
 537                         $wgOut->addMeta( "http:Refresh", "10;url=" . $titleObj->getUrl( "", true, true ));
 538                 }
 539                 $wgOut->addHTML( "\n<p>$r\n" );
 540         }
 541
 542         /* private */ function headElement()
 543         {
 544                 global $wgDocType, $wgDTD, $wgUser, $wgLanguageCode, $wgOutputEncoding, $wgLang;
 545
 546                 $ret = "<!DOCTYPE HTML PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 547
 548                 if ( "" == $this->mHTMLtitle ) {
 549                         $this->mHTMLtitle = $this->mPagetitle;
 550                 }
 551                 $rtl = $wgLang->isRTL() ? " dir='RTL'" : "";
 552                 $ret .= "<html lang=\"$wgLanguageCode\"$rtl><head><title>{$this->mHTMLtitle}</title>\n";
 553                 array_push( $this->mMetatags, array( "http:Content-type", "text/html; charset={$wgOutputEncoding}" ) );
 554                 foreach ( $this->mMetatags as $tag ) {
 555                         if ( 0 == strcasecmp( "http:", substr( $tag[0], 0, 5 ) ) ) {
 556                                 $a = "http-equiv";
 557                                 $tag[0] = substr( $tag[0], 5 );
 558                         } else {
 559                                 $a = "name";
 560                         }
 561                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\">\n";
 562                 }
 563                 $p = $this->mRobotpolicy;
 564                 if ( "" == $p ) { $p = "index,follow"; }
 565                 $ret .= "<meta name=\"robots\" content=\"$p\">\n";
 566
 567                 if ( count( $this->mKeywords ) > 0 ) {
 568                         $ret .= "<meta name=\"keywords\" content=\"" .
 569                           implode( ",", $this->mKeywords ) . "\">\n";
 570                 }
 571                 foreach ( $this->mLinktags as $tag ) {
 572                         $ret .= "<link ";
 573                         if ( "" != $tag[0] ) { $ret .= "rel=\"{$tag[0]}\" "; }
 574                         if ( "" != $tag[1] ) { $ret .= "rev=\"{$tag[1]}\" "; }
 575                         $ret .= "href=\"{$tag[2]}\">\n";
 576                 }
 577                 $sk = $wgUser->getSkin();
 578                 $ret .= $sk->getHeadScripts();
 579                 $ret .= $sk->getUserStyles();
 580
 581                 $ret .= "</head>\n";
 582                 return $ret;
 583         }
 584 }
 585 ?>