includes/GlobalFunctions.php

   1 <?
   2 # Global functions used everywhere
   3
   4 $wgNumberOfArticles = -1; # Unset
   5 $wgTotalViews = -1;
   6 $wgTotalEdits = -1;
   7
   8 global $IP;
   9 include_once( "$IP/DatabaseFunctions.php" );
  10 include_once( "$IP/UpdateClasses.php" );
  11 include_once( "$IP/LogPage.php" );
  12
  13 # PHP 4.1+ has array_key_exists, PHP 4.0.6 has key_exists instead, and earlier
  14 # versions of PHP have neither. So we roll our own. Note that this
  15 # function will return false even for keys that exist but whose associated
  16 # value is NULL.
  17 #
  18 if ( phpversion() == "4.0.6" ) {
  19         function array_key_exists( $k, $a ) {
  20                 return key_exists( $k, $a );
  21         }
  22 } else if (phpversion() < "4.1") {
  23         function array_key_exists( $k, $a ) {
  24                 return isset($a[$k]);
  25         }
  26 }
  27
  28 $wgRandomSeeded = false;
  29
  30 function wfSeedRandom()
  31 {
  32         global $wgRandomSeeded;
  33
  34         if ( ! $wgRandomSeeded ) {
  35                 $seed = hexdec(substr(md5(microtime()),-8)) & 0x7fffffff;
  36                 mt_srand( $seed );
  37                 $wgRandomSeeded = true;
  38         }
  39 }
  40
  41 function wfLocalUrl( $a, $q = "" )
  42 {
  43         global $wgServer, $wgScript, $wgArticlePath;
  44
  45         $a = str_replace( " ", "_", $a );
  46         #$a = wfUrlencode( $a ); # This stuff is _already_ URL-encoded.
  47
  48         if ( "" == $a ) {
  49                 if( "" == $q ) {
  50                         $a = $wgScript;
  51                 } else {
  52                         $a = "{$wgScript}?{$q}";
  53                 }
  54         } else if ( "" == $q ) {
  55                 $a = str_replace( "$1", $a, $wgArticlePath );
  56         } else {
  57                 $a = "{$wgScript}?title={$a}&{$q}";
  58         }
  59         return $a;
  60 }
  61
  62 function wfLocalUrlE( $a, $q = "" )
  63 {
  64         return wfEscapeHTML( wfLocalUrl( $a, $q ) );
  65 }
  66
  67 function wfFullUrl( $a, $q = "" ) {
  68         global $wgServer;
  69         return $wgServer . wfLocalUrl( $a, $q );
  70 }
  71
  72 function wfFullUrlE( $a, $q = "" ) {
  73         return wfEscapeHTML( wfFullUrl( $a, $q ) );
  74 }
  75
  76 function wfImageUrl( $img )
  77 {
  78         global $wgUploadPath;
  79
  80         $nt = Title::newFromText( $img );
  81         $name = $nt->getDBkey();
  82         $hash = md5( $name );
  83
  84         $url = "{$wgUploadPath}/" . $hash{0} . "/" .
  85           substr( $hash, 0, 2 ) . "/{$name}";
  86         return wfUrlencode( $url );
  87 }
  88
  89 function wfImageArchiveUrl( $name )
  90 {
  91         global $wgUploadPath;
  92
  93         $hash = md5( substr( $name, 15) );
  94         $url = "{$wgUploadPath}/archive/" . $hash{0} . "/" .
  95           substr( $hash, 0, 2 ) . "/{$name}";
  96         return $url;
  97 }
  98
  99 function wfUrlencode ( $s )
 100 {
 101         $ulink = urlencode( $s );
 102         $ulink = preg_replace( "/%3[Aa]/", ":", $ulink );
 103         $ulink = preg_replace( "/%2[Ff]/", "/", $ulink );
 104         return $ulink;
 105 }
 106
 107 function wfUtf8Sequence($codepoint) {
 108         if($codepoint <     0x80) return chr($codepoint);
 109         if($codepoint <    0x800) return chr($codepoint >>  6 & 0x3f | 0xc0) .
 110                                      chr($codepoint       & 0x3f | 0x80);
 111     if($codepoint <  0x10000) return chr($codepoint >> 12 & 0x0f | 0xe0) .
 112                                      chr($codepoint >>  6 & 0x3f | 0x80) .
 113                                      chr($codepoint       & 0x3f | 0x80);
 114         if($codepoint < 0x100000) return chr($codepoint >> 18 & 0x07 | 0xf0) . # Double-check this
 115                                          chr($codepoint >> 12 & 0x3f | 0x80) .
 116                                      chr($codepoint >>  6 & 0x3f | 0x80) .
 117                                      chr($codepoint       & 0x3f | 0x80);
 118         # Doesn't yet handle outside the BMP
 119         return "&#$codepoint;";
 120 }
 121
 122 function wfMungeToUtf8($string) {
 123         global $wgInputEncoding; # This is debatable
 124         #$string = iconv($wgInputEncoding, "UTF-8", $string);
 125         $string = preg_replace ( '/&#([0-9]+);/e', 'wfUtf8Sequence($1)', $string );
 126         $string = preg_replace ( '/&#x([0-9a-f]+);/ie', 'wfUtf8Sequence(0x$1)', $string );
 127         # Should also do named entities here
 128         return $string;
 129 }
 130
 131 function wfDebug( $text, $logonly = false )
 132 {
 133         global $wgOut, $wgDebugLogFile, $wgDebugComments;
 134
 135         if ( $wgDebugComments && !$logonly ) {
 136                 $wgOut->debug( $text );
 137         }
 138         if ( "" != $wgDebugLogFile ) {
 139                 error_log( $text, 3, $wgDebugLogFile );
 140         }
 141 }
 142
 143 function wfReadOnly()
 144 {
 145         global $wgReadOnlyFile;
 146
 147         if ( "" == $wgReadOnlyFile ) { return false; }
 148         return is_file( $wgReadOnlyFile );
 149 }
 150
 151 $wgReplacementKeys = array( "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9" );
 152
 153 function wfMsg( $key ) {
 154         $args = func_get_args();
 155         if ( count( $args ) ) {
 156                 array_shift( $args );
 157         }
 158         return wfMsgReal( $key, $args, true );
 159 }
 160
 161 function wfMsgNoDB( $key ) {
 162         $args = func_get_args();
 163         if ( count( $args ) ) {
 164                 array_shift( $args );
 165         }
 166         return wfMsgReal( $key, $args, false );
 167 }
 168
 169 function wfMsgReal( $key, $args, $useDB ) {
 170         global $wgLang, $wgReplacementKeys, $wgMemc, $wgDBname;
 171         global $wgUseDatabaseMessages, $wgUseMemCached, $wgOut;
 172         global $wgAllMessagesEn;
 173
 174         $fname = "wfMsg";
 175         wfProfileIn( $fname );
 176
 177         static $messageCache = false;
 178         $memcKey = "$wgDBname:messages";
 179         $fname = "wfMsg";
 180         $message = false;
 181
 182         # newFromText is too slow!
 183         $title = ucfirst( $key );
 184         if ( $messageCache ) {
 185                 $message = $messageCache[$title];
 186         } elseif ( !$wgUseDatabaseMessages || !$useDB ) {
 187                 $message = $wgLang->getMessage( $key );
 188         }
 189
 190         if ( !$message && $wgUseMemCached ) {
 191                 # Try memcached
 192                 if ( !$messageCache ) {
 193                         $messageCache = $wgMemc->get( $memcKey );
 194                 }
 195
 196                 # If there's nothing in memcached, load all the messages from the database
 197                 if ( !$messageCache ) {
 198                         # Other threads don't need to load the messages if another thread is doing it.
 199                         $wgMemc->set( $memcKey, "loading", time() + 60 );
 200
 201                         $sql = "SELECT cur_title,cur_text FROM cur WHERE cur_namespace=" . NS_MEDIAWIKI;
 202                         $res = wfQuery( $sql, DB_READ, $fname );
 203                         for ( $row = wfFetchObject( $res ); $row; $row = wfFetchObject( $res ) ) {
 204                                 $messageCache[$row->cur_title] = $row->cur_text;
 205                         }
 206                         # Save in memcached
 207                         $wgMemc->set( $memcKey, $messageCache, time() + 3600 );
 208                 }
 209                 if ( is_array( $messageCache ) && array_key_exists( $title, $messageCache ) ) {
 210                         $message = $messageCache[$title];
 211                 }
 212         }
 213
 214         # If there was no MemCached, load each message from the DB individually
 215         if ( !$message ) {
 216                 if ( $useDB ) {
 217                         $sql = "SELECT cur_text FROM cur WHERE cur_namespace=" . NS_MEDIAWIKI .
 218                                 " AND cur_title='$title'";
 219                         $res = wfQuery( $sql, DB_READ, $fname );
 220
 221                         if ( wfNumRows( $res ) ) {
 222                                 $obj = wfFetchObject( $res );
 223                                 $message = $obj->cur_text;
 224                                 wfFreeResult( $res );
 225                         }
 226                 }
 227         }
 228
 229         # Finally, try the array in $wgLang
 230         if ( !$message ) {
 231                 $message = $wgLang->getMessage( $key );
 232         }
 233
 234         # Replace arguments
 235         if( count( $args ) ) {
 236                 $message = str_replace( $wgReplacementKeys, $args, $message );
 237         }
 238         wfProfileOut( $fname );
 239         if ( !$message ) {
 240                 # Failed, message not translated
 241                 return "&lt;$key&gt;";
 242         }
 243         return $message;
 244 }
 245
 246 function wfCleanFormFields( $fields )
 247 {
 248         global $HTTP_POST_VARS;
 249         global $wgInputEncoding, $wgOutputEncoding, $wgEditEncoding, $wgLang;
 250
 251         if ( get_magic_quotes_gpc() ) {
 252                 foreach ( $fields as $fname ) {
 253                         if ( isset( $HTTP_POST_VARS[$fname] ) ) {
 254                                 $HTTP_POST_VARS[$fname] = stripslashes(
 255                                   $HTTP_POST_VARS[$fname] );
 256                         }
 257                         global ${$fname};
 258                         if ( isset( ${$fname} ) ) {
 259                                 ${$fname} = stripslashes( ${$fname} );
 260                         }
 261                 }
 262         }
 263         $enc = $wgOutputEncoding;
 264         if( $wgEditEncoding != "") $enc = $wgEditEncoding;
 265         if ( $enc != $wgInputEncoding ) {
 266                 foreach ( $fields as $fname ) {
 267                         if ( isset( $HTTP_POST_VARS[$fname] ) ) {
 268                                 $HTTP_POST_VARS[$fname] = $wgLang->iconv(
 269                                   $wgOutputEncoding, $wgInputEncoding,
 270                                   $HTTP_POST_VARS[$fname] );
 271                         }
 272                         global ${$fname};
 273                         if ( isset( ${$fname} ) ) {
 274                                 ${$fname} = $wgLang->iconv(
 275                                   $enc, $wgInputEncoding, ${$fname} );
 276                         }
 277                 }
 278         }
 279 }
 280
 281 function wfMungeQuotes( $in )
 282 {
 283         $out = str_replace( "%", "%25", $in );
 284         $out = str_replace( "'", "%27", $out );
 285         $out = str_replace( "\"", "%22", $out );
 286         return $out;
 287 }
 288
 289 function wfDemungeQuotes( $in )
 290 {
 291         $out = str_replace( "%22", "\"", $in );
 292         $out = str_replace( "%27", "'", $out );
 293         $out = str_replace( "%25", "%", $out );
 294         return $out;
 295 }
 296
 297 function wfCleanQueryVar( $var )
 298 {
 299         global $wgLang;
 300         if ( get_magic_quotes_gpc() ) {
 301                 $var = stripslashes( $var );
 302         }
 303         return $wgLang->recodeInput( $var );
 304 }
 305
 306 function wfSpecialPage()
 307 {
 308         global $wgUser, $wgOut, $wgTitle, $wgLang;
 309
 310         /* FIXME: this list probably shouldn't be language-specific, per se */
 311         $validSP = $wgLang->getValidSpecialPages();
 312         $sysopSP = $wgLang->getSysopSpecialPages();
 313         $devSP = $wgLang->getDeveloperSpecialPages();
 314
 315         $wgOut->setArticleFlag( false );
 316         $wgOut->setRobotpolicy( "noindex,follow" );
 317
 318         $par = NULL;
 319         list($t, $par) = split( "/", $wgTitle->getDBkey(), 2 );
 320
 321         if ( array_key_exists( $t, $validSP ) ||
 322           ( $wgUser->isSysop() && array_key_exists( $t, $sysopSP ) ) ||
 323           ( $wgUser->isDeveloper() && array_key_exists( $t, $devSP ) ) ) {
 324                 if($par !== NULL)
 325                         $wgTitle = Title::makeTitle( Namespace::getSpecial(), $t );
 326
 327                 $wgOut->setPageTitle( wfMsg( strtolower( $wgTitle->getText() ) ) );
 328
 329                 $inc = "Special" . $t . ".php";
 330                 include_once( $inc );
 331                 $call = "wfSpecial" . $t;
 332                 $call( $par );
 333         } else if ( array_key_exists( $t, $sysopSP ) ) {
 334                 $wgOut->sysopRequired();
 335         } else if ( array_key_exists( $t, $devSP ) ) {
 336                 $wgOut->developerRequired();
 337         } else {
 338                 $wgOut->errorpage( "nosuchspecialpage", "nospecialpagetext" );
 339         }
 340 }
 341
 342 function wfSearch( $s )
 343 {
 344         $se = new SearchEngine( wfCleanQueryVar( $s ) );
 345         $se->showResults();
 346 }
 347
 348 function wfGo( $s )
 349 { # pick the nearest match
 350         $se = new SearchEngine( wfCleanQueryVar( $s ) );
 351         $se->goResult();
 352 }
 353
 354 function wfNumberOfArticles()
 355 {
 356         global $wgNumberOfArticles;
 357
 358         wfLoadSiteStats();
 359         return $wgNumberOfArticles;
 360 }
 361
 362 /* private */ function wfLoadSiteStats()
 363 {
 364         global $wgNumberOfArticles, $wgTotalViews, $wgTotalEdits;
 365         if ( -1 != $wgNumberOfArticles ) return;
 366
 367         $sql = "SELECT ss_total_views, ss_total_edits, ss_good_articles " .
 368           "FROM site_stats WHERE ss_row_id=1";
 369         $res = wfQuery( $sql, DB_READ, "wfLoadSiteStats" );
 370
 371         if ( 0 == wfNumRows( $res ) ) { return; }
 372         else {
 373                 $s = wfFetchObject( $res );
 374                 $wgTotalViews = $s->ss_total_views;
 375                 $wgTotalEdits = $s->ss_total_edits;
 376                 $wgNumberOfArticles = $s->ss_good_articles;
 377         }
 378 }
 379
 380 function wfEscapeHTML( $in )
 381 {
 382         return str_replace(
 383                 array( "&", "\"", ">", "<" ),
 384                 array( "&amp;", "&quot;", "&gt;", "&lt;" ),
 385                 $in );
 386 }
 387
 388 function wfEscapeHTMLTagsOnly( $in ) {
 389         return str_replace(
 390                 array( "\"", ">", "<" ),
 391                 array( "&quot;", "&gt;", "&lt;" ),
 392                 $in );
 393 }
 394
 395 function wfUnescapeHTML( $in )
 396 {
 397         $in = str_replace( "&lt;", "<", $in );
 398         $in = str_replace( "&gt;", ">", $in );
 399         $in = str_replace( "&quot;", "\"", $in );
 400         $in = str_replace( "&amp;", "&", $in );
 401         return $in;
 402 }
 403
 404 function wfImageDir( $fname )
 405 {
 406         global $wgUploadDirectory;
 407
 408         $hash = md5( $fname );
 409         $oldumask = umask(0);
 410         $dest = $wgUploadDirectory . "/" . $hash{0};
 411         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
 412         $dest .= "/" . substr( $hash, 0, 2 );
 413         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
 414
 415         umask( $oldumask );
 416         return $dest;
 417 }
 418
 419 function wfImageArchiveDir( $fname )
 420 {
 421         global $wgUploadDirectory;
 422
 423         $hash = md5( $fname );
 424         $oldumask = umask(0);
 425         $archive = "{$wgUploadDirectory}/archive";
 426         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 427         $archive .= "/" . $hash{0};
 428         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 429         $archive .= "/" . substr( $hash, 0, 2 );
 430         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 431
 432         umask( $oldumask );
 433         return $archive;
 434 }
 435
 436 function wfRecordUpload( $name, $oldver, $size, $desc )
 437 {
 438         global $wgUser, $wgLang, $wgTitle, $wgOut, $wgDeferredUpdateList;
 439         global $wgUseCopyrightUpload , $wpUploadCopyStatus , $wpUploadSource ;
 440
 441         $fname = "wfRecordUpload";
 442
 443         $sql = "SELECT img_name,img_size,img_timestamp,img_description,img_user," .
 444           "img_user_text FROM image WHERE img_name='" . wfStrencode( $name ) . "'";
 445         $res = wfQuery( $sql, DB_READ, $fname );
 446
 447         $now = wfTimestampNow();
 448         $won = wfInvertTimestamp( $now );
 449
 450         if ( $wgUseCopyrightUpload )
 451           {
 452             $textdesc = "== " . wfMsg ( "filedesc" ) . " ==\n" . $desc . "\n" .
 453               "== " . wfMsg ( "filestatus" ) . " ==\n" . $wpUploadCopyStatus . "\n" .
 454               "== " . wfMsg ( "filesource" ) . " ==\n" . $wpUploadSource ;
 455           }
 456         else $textdesc = $desc ;
 457
 458         if ( 0 == wfNumRows( $res ) ) {
 459                 $sql = "INSERT INTO image (img_name,img_size,img_timestamp," .
 460                   "img_description,img_user,img_user_text) VALUES ('" .
 461                   wfStrencode( $name ) . "',{$size},'{$now}','" .
 462                   wfStrencode( $desc ) . "', '" . $wgUser->getID() .
 463                   "', '" . wfStrencode( $wgUser->getName() ) . "')";
 464                 wfQuery( $sql, DB_WRITE, $fname );
 465
 466                 $sql = "SELECT cur_id,cur_text FROM cur WHERE cur_namespace=" .
 467                   Namespace::getImage() . " AND cur_title='" .
 468                   wfStrencode( $name ) . "'";
 469                 $res = wfQuery( $sql, DB_READ, $fname );
 470                 if ( 0 == wfNumRows( $res ) ) {
 471             $common =
 472                           Namespace::getImage() . ",'" .
 473                           wfStrencode( $name ) . "','" .
 474                           wfStrencode( $desc ) . "','" . $wgUser->getID() . "','" .
 475                           wfStrencode( $wgUser->getName() ) . "','" . $now .
 476                           "',1";
 477                         $sql = "INSERT INTO cur (cur_namespace,cur_title," .
 478                           "cur_comment,cur_user,cur_user_text,cur_timestamp,cur_is_new," .
 479                           "cur_text,inverse_timestamp,cur_touched) VALUES (" .
 480                           $common .
 481                           ",'" . wfStrencode( $textdesc ) . "','{$won}','{$now}')";
 482                         wfQuery( $sql, DB_WRITE, $fname );
 483                         $id = wfInsertId() or 0; # We should throw an error instead
 484                         $sql = "INSERT INTO recentchanges (rc_namespace,rc_title,
 485                                 rc_comment,rc_user,rc_user_text,rc_timestamp,rc_new,
 486                                 rc_cur_id,rc_cur_time) VALUES ({$common},{$id},'{$now}')";
 487             wfQuery( $sql, DB_WRITE, $fname );
 488                         $u = new SearchUpdate( $id, $name, $desc );
 489                         $u->doUpdate();
 490                 }
 491         } else {
 492                 $s = wfFetchObject( $res );
 493
 494                 $sql = "INSERT INTO oldimage (oi_name,oi_archive_name,oi_size," .
 495                   "oi_timestamp,oi_description,oi_user,oi_user_text) VALUES ('" .
 496                   wfStrencode( $s->img_name ) . "','" .
 497                   wfStrencode( $oldver ) .
 498                   "',{$s->img_size},'{$s->img_timestamp}','" .
 499                   wfStrencode( $s->img_description ) . "','" .
 500                   wfStrencode( $s->img_user ) . "','" .
 501                   wfStrencode( $s->img_user_text) . "')";
 502                 wfQuery( $sql, DB_WRITE, $fname );
 503
 504                 $sql = "UPDATE image SET img_size={$size}," .
 505                   "img_timestamp='" . wfTimestampNow() . "',img_user='" .
 506                   $wgUser->getID() . "',img_user_text='" .
 507                   wfStrencode( $wgUser->getName() ) . "', img_description='" .
 508                   wfStrencode( $desc ) . "' WHERE img_name='" .
 509                   wfStrencode( $name ) . "'";
 510                 wfQuery( $sql, DB_WRITE, $fname );
 511
 512                 $sql = "UPDATE cur SET cur_touched='{$now}' WHERE cur_namespace=" .
 513                   Namespace::getImage() . " AND cur_title='" .
 514                   wfStrencode( $name ) . "'";
 515                 wfQuery( $sql, DB_WRITE, $fname );
 516         }
 517
 518         $log = new LogPage( wfMsg( "uploadlogpage" ), wfMsg( "uploadlogpagetext" ) );
 519         $da = str_replace( "$1", "[[:" . $wgLang->getNsText(
 520           Namespace::getImage() ) . ":{$name}|{$name}]]",
 521           wfMsg( "uploadedimage" ) );
 522         $ta = str_replace( "$1", $name, wfMsg( "uploadedimage" ) );
 523         $log->addEntry( $da, $desc, $ta );
 524 }
 525
 526
 527 /* Some generic result counters, pulled out of SearchEngine */
 528
 529 function wfShowingResults( $offset, $limit )
 530 {
 531         $top = str_replace( "$1", $limit, wfMsg( "showingresults" ) );
 532         $top = str_replace( "$2", $offset+1, $top );
 533         return $top;
 534 }
 535
 536 function wfShowingResultsNum( $offset, $limit, $num )
 537 {
 538         $top = str_replace( "$1", $limit, wfMsg( "showingresultsnum" ) );
 539         $top = str_replace( "$2", $offset+1, $top );
 540         $top = str_replace( "$3", $num, $top );
 541         return $top;
 542 }
 543
 544 function wfViewPrevNext( $offset, $limit, $link, $query = "" )
 545 {
 546         global $wgUser;
 547         $prev = str_replace( "$1", $limit, wfMsg( "prevn" ) );
 548         $next = str_replace( "$1", $limit, wfMsg( "nextn" ) );
 549
 550         $sk = $wgUser->getSkin();
 551         if ( 0 != $offset ) {
 552                 $po = $offset - $limit;
 553                 if ( $po < 0 ) { $po = 0; }
 554                 $q = "limit={$limit}&offset={$po}";
 555                 if ( "" != $query ) { $q .= "&{$query}"; }
 556                 $plink = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$prev}</a>";
 557         } else { $plink = $prev; }
 558
 559         $no = $offset + $limit;
 560         $q = "limit={$limit}&offset={$no}";
 561         if ( "" != $query ) { $q .= "&{$query}"; }
 562
 563         $nlink = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$next}</a>";
 564         $nums = wfNumLink( $offset, 20, $link , $query ) . " | " .
 565           wfNumLink( $offset, 50, $link, $query ) . " | " .
 566           wfNumLink( $offset, 100, $link, $query ) . " | " .
 567           wfNumLink( $offset, 250, $link, $query ) . " | " .
 568           wfNumLink( $offset, 500, $link, $query );
 569
 570         $sl = str_replace( "$1", $plink, wfMsg( "viewprevnext" ) );
 571         $sl = str_replace( "$2", $nlink, $sl );
 572         $sl = str_replace( "$3", $nums, $sl );
 573         return $sl;
 574 }
 575
 576 function wfNumLink( $offset, $limit, $link, $query = "" )
 577 {
 578         global $wgUser;
 579         if ( "" == $query ) { $q = ""; }
 580         else { $q = "{$query}&"; }
 581         $q .= "limit={$limit}&offset={$offset}";
 582
 583         $s = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$limit}</a>";
 584         return $s;
 585 }
 586
 587 function wfClientAcceptsGzip() {
 588         global $wgUseGzip;
 589         if( $wgUseGzip ) {
 590                 # FIXME: we may want to blacklist some broken browsers
 591                 if( preg_match(
 592                         '/\bgzip(?:;(q)=([0-9]+(?:\.[0-9]+)))?\b/',
 593                         $_SERVER["HTTP_ACCEPT_ENCODING"],
 594                         $m ) ) {
 595                         if( ( $m[1] == "q" ) && ( $m[2] == 0 ) ) return false;
 596                         wfDebug( " accepts gzip\n" );
 597                         return true;
 598                 }
 599         }
 600         return false;
 601 }
 602
 603 # Yay, more global functions!
 604 function wfCheckLimits( $deflimit = 50, $optionname = "rclimit" ) {
 605         global $wgUser;
 606
 607         $limit = (int)$_REQUEST['limit'];
 608         if( $limit < 0 ) $limit = 0;
 609         if( ( $limit == 0 ) && ( $optionname != "" ) ) {
 610                 $limit = (int)$wgUser->getOption( $optionname );
 611         }
 612         if( $limit <= 0 ) $limit = $deflimit;
 613         if( $limit > 5000 ) $limit = 5000; # We have *some* limits...
 614
 615         $offset = (int)$_REQUEST['offset'];
 616         $offset = (int)$offset;
 617         if( $offset < 0 ) $offset = 0;
 618         if( $offset > 65000 ) $offset = 65000; # do we need a max? what?
 619
 620         return array( $limit, $offset );
 621 }
 622
 623 # Used in OutputPage::replaceVariables and Article:pstPass2
 624 function replaceMsgVar( $matches ) {
 625         return wfMsg( $matches[1] );
 626 }
 627
 628 function replaceMsgVarNw( $matches ) {
 629         $text = htmlspecialchars( wfMsg( $matches[1] ) );
 630         return $text;
 631 }
 632
 633 ?>