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;
 172
 173         static $l1cache = array();
 174         $fname = "wfMsg";
 175         $message = false;
 176         $l1hit = false;
 177
 178         # Check for DB suppression
 179         if ( !$wgUseDatabaseMessages || !$useDB ) {
 180                 $message = $wgLang->getMessage( $key );
 181         }
 182
 183         # Try L1 cache
 184         if ( $message === false && array_key_exists( $key, $l1cache ) ) {
 185                 $message  = $l1cache[$key];
 186                 if ( $message === false ) {
 187                         $message = $wgLang->getMessage( $key );
 188                 }
 189                 $l1hit = true;
 190         }
 191
 192         # Try memcached
 193         if ( $message === false ) {
 194                 $titleObj = Title::newFromText( $key );
 195                 $title = $titleObj->getDBkey();
 196                 $mcKey = "$wgDBname:MediaWiki:title:$title";
 197                 $message = $wgMemc->get( $mcKey );
 198         }
 199
 200         # Try database
 201         if ( $message === false) {
 202                 if ( $useDB ) {
 203                         $sql = "SELECT cur_text FROM cur WHERE cur_namespace=" . NS_MEDIAWIKI .
 204                                 " AND cur_title='$title'";
 205                         $res = wfQuery( $sql, DB_READ, $fname );
 206
 207                         if ( wfNumRows( $res ) ) {
 208                                 # Got it from the database, now store in MemCached
 209                                 $obj = wfFetchObject( $res );
 210                                 $message = $obj->cur_text;
 211                                 wfFreeResult( $res );
 212                                 $wgMemc->set( $key, $message, time() + 1800 );
 213                         }
 214                 }
 215         }
 216
 217         # Finally, try the array in $wgLang
 218         if ( $message === false ) {
 219                 $message = $wgLang->getMessage( $key );
 220                 $l1cache[$key] = false;
 221         } elseif ( !$l1hit && $wgUseDatabaseMessages) {
 222                 $l1cache[$key] = $message;
 223         }
 224
 225         # Replace arguments
 226         if( count( $args ) ) {
 227                 $message = str_replace( $wgReplacementKeys, $args, $message );
 228         }
 229
 230         if ( "" == $message ) {
 231                 # Let's at least _try_ to be graceful about this.
 232                 return "&lt;$key&gt;";
 233         }
 234         return $message;
 235 }
 236
 237 function wfCleanFormFields( $fields )
 238 {
 239         global $HTTP_POST_VARS;
 240         global $wgInputEncoding, $wgOutputEncoding, $wgEditEncoding, $wgLang;
 241
 242         if ( get_magic_quotes_gpc() ) {
 243                 foreach ( $fields as $fname ) {
 244                         if ( isset( $HTTP_POST_VARS[$fname] ) ) {
 245                                 $HTTP_POST_VARS[$fname] = stripslashes(
 246                                   $HTTP_POST_VARS[$fname] );
 247                         }
 248                         global ${$fname};
 249                         if ( isset( ${$fname} ) ) {
 250                                 ${$fname} = stripslashes( ${$fname} );
 251                         }
 252                 }
 253         }
 254         $enc = $wgOutputEncoding;
 255         if( $wgEditEncoding != "") $enc = $wgEditEncoding;
 256         if ( $enc != $wgInputEncoding ) {
 257                 foreach ( $fields as $fname ) {
 258                         if ( isset( $HTTP_POST_VARS[$fname] ) ) {
 259                                 $HTTP_POST_VARS[$fname] = $wgLang->iconv(
 260                                   $wgOutputEncoding, $wgInputEncoding,
 261                                   $HTTP_POST_VARS[$fname] );
 262                         }
 263                         global ${$fname};
 264                         if ( isset( ${$fname} ) ) {
 265                                 ${$fname} = $wgLang->iconv(
 266                                   $enc, $wgInputEncoding, ${$fname} );
 267                         }
 268                 }
 269         }
 270 }
 271
 272 function wfMungeQuotes( $in )
 273 {
 274         $out = str_replace( "%", "%25", $in );
 275         $out = str_replace( "'", "%27", $out );
 276         $out = str_replace( "\"", "%22", $out );
 277         return $out;
 278 }
 279
 280 function wfDemungeQuotes( $in )
 281 {
 282         $out = str_replace( "%22", "\"", $in );
 283         $out = str_replace( "%27", "'", $out );
 284         $out = str_replace( "%25", "%", $out );
 285         return $out;
 286 }
 287
 288 function wfCleanQueryVar( $var )
 289 {
 290         global $wgLang;
 291         if ( get_magic_quotes_gpc() ) {
 292                 $var = stripslashes( $var );
 293         }
 294         return $wgLang->recodeInput( $var );
 295 }
 296
 297 function wfSpecialPage()
 298 {
 299         global $wgUser, $wgOut, $wgTitle, $wgLang;
 300
 301         /* FIXME: this list probably shouldn't be language-specific, per se */
 302         $validSP = $wgLang->getValidSpecialPages();
 303         $sysopSP = $wgLang->getSysopSpecialPages();
 304         $devSP = $wgLang->getDeveloperSpecialPages();
 305
 306         $wgOut->setArticleFlag( false );
 307         $wgOut->setRobotpolicy( "noindex,follow" );
 308
 309         $par = NULL;
 310         list($t, $par) = split( "/", $wgTitle->getDBkey(), 2 );
 311
 312         if ( array_key_exists( $t, $validSP ) ||
 313           ( $wgUser->isSysop() && array_key_exists( $t, $sysopSP ) ) ||
 314           ( $wgUser->isDeveloper() && array_key_exists( $t, $devSP ) ) ) {
 315                 if($par !== NULL)
 316                         $wgTitle = Title::makeTitle( Namespace::getSpecial(), $t );
 317
 318                 $wgOut->setPageTitle( wfMsg( strtolower( $wgTitle->getText() ) ) );
 319
 320                 $inc = "Special" . $t . ".php";
 321                 include_once( $inc );
 322                 $call = "wfSpecial" . $t;
 323                 $call( $par );
 324         } else if ( array_key_exists( $t, $sysopSP ) ) {
 325                 $wgOut->sysopRequired();
 326         } else if ( array_key_exists( $t, $devSP ) ) {
 327                 $wgOut->developerRequired();
 328         } else {
 329                 $wgOut->errorpage( "nosuchspecialpage", "nospecialpagetext" );
 330         }
 331 }
 332
 333 function wfSearch( $s )
 334 {
 335         $se = new SearchEngine( wfCleanQueryVar( $s ) );
 336         $se->showResults();
 337 }
 338
 339 function wfGo( $s )
 340 { # pick the nearest match
 341         $se = new SearchEngine( wfCleanQueryVar( $s ) );
 342         $se->goResult();
 343 }
 344
 345 function wfNumberOfArticles()
 346 {
 347         global $wgNumberOfArticles;
 348
 349         wfLoadSiteStats();
 350         return $wgNumberOfArticles;
 351 }
 352
 353 /* private */ function wfLoadSiteStats()
 354 {
 355         global $wgNumberOfArticles, $wgTotalViews, $wgTotalEdits;
 356         if ( -1 != $wgNumberOfArticles ) return;
 357
 358         $sql = "SELECT ss_total_views, ss_total_edits, ss_good_articles " .
 359           "FROM site_stats WHERE ss_row_id=1";
 360         $res = wfQuery( $sql, DB_READ, "wfLoadSiteStats" );
 361
 362         if ( 0 == wfNumRows( $res ) ) { return; }
 363         else {
 364                 $s = wfFetchObject( $res );
 365                 $wgTotalViews = $s->ss_total_views;
 366                 $wgTotalEdits = $s->ss_total_edits;
 367                 $wgNumberOfArticles = $s->ss_good_articles;
 368         }
 369 }
 370
 371 function wfEscapeHTML( $in )
 372 {
 373         return str_replace(
 374                 array( "&", "\"", ">", "<" ),
 375                 array( "&amp;", "&quot;", "&gt;", "&lt;" ),
 376                 $in );
 377 }
 378
 379 function wfEscapeHTMLTagsOnly( $in ) {
 380         return str_replace(
 381                 array( "\"", ">", "<" ),
 382                 array( "&quot;", "&gt;", "&lt;" ),
 383                 $in );
 384 }
 385
 386 function wfUnescapeHTML( $in )
 387 {
 388         $in = str_replace( "&lt;", "<", $in );
 389         $in = str_replace( "&gt;", ">", $in );
 390         $in = str_replace( "&quot;", "\"", $in );
 391         $in = str_replace( "&amp;", "&", $in );
 392         return $in;
 393 }
 394
 395 function wfImageDir( $fname )
 396 {
 397         global $wgUploadDirectory;
 398
 399         $hash = md5( $fname );
 400         $oldumask = umask(0);
 401         $dest = $wgUploadDirectory . "/" . $hash{0};
 402         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
 403         $dest .= "/" . substr( $hash, 0, 2 );
 404         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
 405
 406         umask( $oldumask );
 407         return $dest;
 408 }
 409
 410 function wfImageArchiveDir( $fname )
 411 {
 412         global $wgUploadDirectory;
 413
 414         $hash = md5( $fname );
 415         $oldumask = umask(0);
 416         $archive = "{$wgUploadDirectory}/archive";
 417         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 418         $archive .= "/" . $hash{0};
 419         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 420         $archive .= "/" . substr( $hash, 0, 2 );
 421         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 422
 423         umask( $oldumask );
 424         return $archive;
 425 }
 426
 427 function wfRecordUpload( $name, $oldver, $size, $desc )
 428 {
 429         global $wgUser, $wgLang, $wgTitle, $wgOut, $wgDeferredUpdateList;
 430         global $wgUseCopyrightUpload , $wpUploadCopyStatus , $wpUploadSource ;
 431
 432         $fname = "wfRecordUpload";
 433
 434         $sql = "SELECT img_name,img_size,img_timestamp,img_description,img_user," .
 435           "img_user_text FROM image WHERE img_name='" . wfStrencode( $name ) . "'";
 436         $res = wfQuery( $sql, DB_READ, $fname );
 437
 438         $now = wfTimestampNow();
 439         $won = wfInvertTimestamp( $now );
 440
 441         if ( $wgUseCopyrightUpload )
 442           {
 443             $textdesc = "== " . wfMsg ( "filedesc" ) . " ==\n" . $desc . "\n" .
 444               "== " . wfMsg ( "filestatus" ) . " ==\n" . $wpUploadCopyStatus . "\n" .
 445               "== " . wfMsg ( "filesource" ) . " ==\n" . $wpUploadSource ;
 446           }
 447         else $textdesc = $desc ;
 448
 449         if ( 0 == wfNumRows( $res ) ) {
 450                 $sql = "INSERT INTO image (img_name,img_size,img_timestamp," .
 451                   "img_description,img_user,img_user_text) VALUES ('" .
 452                   wfStrencode( $name ) . "',{$size},'{$now}','" .
 453                   wfStrencode( $desc ) . "', '" . $wgUser->getID() .
 454                   "', '" . wfStrencode( $wgUser->getName() ) . "')";
 455                 wfQuery( $sql, DB_WRITE, $fname );
 456
 457                 $sql = "SELECT cur_id,cur_text FROM cur WHERE cur_namespace=" .
 458                   Namespace::getImage() . " AND cur_title='" .
 459                   wfStrencode( $name ) . "'";
 460                 $res = wfQuery( $sql, DB_READ, $fname );
 461                 if ( 0 == wfNumRows( $res ) ) {
 462             $common =
 463                           Namespace::getImage() . ",'" .
 464                           wfStrencode( $name ) . "','" .
 465                           wfStrencode( $desc ) . "','" . $wgUser->getID() . "','" .
 466                           wfStrencode( $wgUser->getName() ) . "','" . $now .
 467                           "',1";
 468                         $sql = "INSERT INTO cur (cur_namespace,cur_title," .
 469                           "cur_comment,cur_user,cur_user_text,cur_timestamp,cur_is_new," .
 470                           "cur_text,inverse_timestamp,cur_touched) VALUES (" .
 471                           $common .
 472                           ",'" . wfStrencode( $textdesc ) . "','{$won}','{$now}')";
 473                         wfQuery( $sql, DB_WRITE, $fname );
 474                         $id = wfInsertId() or 0; # We should throw an error instead
 475                         $sql = "INSERT INTO recentchanges (rc_namespace,rc_title,
 476                                 rc_comment,rc_user,rc_user_text,rc_timestamp,rc_new,
 477                                 rc_cur_id,rc_cur_time) VALUES ({$common},{$id},'{$now}')";
 478             wfQuery( $sql, DB_WRITE, $fname );
 479                         $u = new SearchUpdate( $id, $name, $desc );
 480                         $u->doUpdate();
 481                 }
 482         } else {
 483                 $s = wfFetchObject( $res );
 484
 485                 $sql = "INSERT INTO oldimage (oi_name,oi_archive_name,oi_size," .
 486                   "oi_timestamp,oi_description,oi_user,oi_user_text) VALUES ('" .
 487                   wfStrencode( $s->img_name ) . "','" .
 488                   wfStrencode( $oldver ) .
 489                   "',{$s->img_size},'{$s->img_timestamp}','" .
 490                   wfStrencode( $s->img_description ) . "','" .
 491                   wfStrencode( $s->img_user ) . "','" .
 492                   wfStrencode( $s->img_user_text) . "')";
 493                 wfQuery( $sql, DB_WRITE, $fname );
 494
 495                 $sql = "UPDATE image SET img_size={$size}," .
 496                   "img_timestamp='" . wfTimestampNow() . "',img_user='" .
 497                   $wgUser->getID() . "',img_user_text='" .
 498                   wfStrencode( $wgUser->getName() ) . "', img_description='" .
 499                   wfStrencode( $desc ) . "' WHERE img_name='" .
 500                   wfStrencode( $name ) . "'";
 501                 wfQuery( $sql, DB_WRITE, $fname );
 502
 503                 $sql = "UPDATE cur SET cur_touched='{$now}' WHERE cur_namespace=" .
 504                   Namespace::getImage() . " AND cur_title='" .
 505                   wfStrencode( $name ) . "'";
 506                 wfQuery( $sql, DB_WRITE, $fname );
 507         }
 508
 509         $log = new LogPage( wfMsg( "uploadlogpage" ), wfMsg( "uploadlogpagetext" ) );
 510         $da = str_replace( "$1", "[[:" . $wgLang->getNsText(
 511           Namespace::getImage() ) . ":{$name}|{$name}]]",
 512           wfMsg( "uploadedimage" ) );
 513         $ta = str_replace( "$1", $name, wfMsg( "uploadedimage" ) );
 514         $log->addEntry( $da, $desc, $ta );
 515 }
 516
 517
 518 /* Some generic result counters, pulled out of SearchEngine */
 519
 520 function wfShowingResults( $offset, $limit )
 521 {
 522         $top = str_replace( "$1", $limit, wfMsg( "showingresults" ) );
 523         $top = str_replace( "$2", $offset+1, $top );
 524         return $top;
 525 }
 526
 527 function wfShowingResultsNum( $offset, $limit, $num )
 528 {
 529         $top = str_replace( "$1", $limit, wfMsg( "showingresultsnum" ) );
 530         $top = str_replace( "$2", $offset+1, $top );
 531         $top = str_replace( "$3", $num, $top );
 532         return $top;
 533 }
 534
 535 function wfViewPrevNext( $offset, $limit, $link, $query = "" )
 536 {
 537         global $wgUser;
 538         $prev = str_replace( "$1", $limit, wfMsg( "prevn" ) );
 539         $next = str_replace( "$1", $limit, wfMsg( "nextn" ) );
 540
 541         $sk = $wgUser->getSkin();
 542         if ( 0 != $offset ) {
 543                 $po = $offset - $limit;
 544                 if ( $po < 0 ) { $po = 0; }
 545                 $q = "limit={$limit}&offset={$po}";
 546                 if ( "" != $query ) { $q .= "&{$query}"; }
 547                 $plink = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$prev}</a>";
 548         } else { $plink = $prev; }
 549
 550         $no = $offset + $limit;
 551         $q = "limit={$limit}&offset={$no}";
 552         if ( "" != $query ) { $q .= "&{$query}"; }
 553
 554         $nlink = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$next}</a>";
 555         $nums = wfNumLink( $offset, 20, $link , $query ) . " | " .
 556           wfNumLink( $offset, 50, $link, $query ) . " | " .
 557           wfNumLink( $offset, 100, $link, $query ) . " | " .
 558           wfNumLink( $offset, 250, $link, $query ) . " | " .
 559           wfNumLink( $offset, 500, $link, $query );
 560
 561         $sl = str_replace( "$1", $plink, wfMsg( "viewprevnext" ) );
 562         $sl = str_replace( "$2", $nlink, $sl );
 563         $sl = str_replace( "$3", $nums, $sl );
 564         return $sl;
 565 }
 566
 567 function wfNumLink( $offset, $limit, $link, $query = "" )
 568 {
 569         global $wgUser;
 570         if ( "" == $query ) { $q = ""; }
 571         else { $q = "{$query}&"; }
 572         $q .= "limit={$limit}&offset={$offset}";
 573
 574         $s = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$limit}</a>";
 575         return $s;
 576 }
 577
 578 function wfClientAcceptsGzip() {
 579         global $wgUseGzip;
 580         if( $wgUseGzip ) {
 581                 # FIXME: we may want to blacklist some broken browsers
 582                 if( preg_match(
 583                         '/\bgzip(?:;(q)=([0-9]+(?:\.[0-9]+)))?\b/',
 584                         $_SERVER["HTTP_ACCEPT_ENCODING"],
 585                         $m ) ) {
 586                         if( ( $m[1] == "q" ) && ( $m[2] == 0 ) ) return false;
 587                         wfDebug( " accepts gzip\n" );
 588                         return true;
 589                 }
 590         }
 591         return false;
 592 }
 593
 594 # Yay, more global functions!
 595 function wfCheckLimits( $deflimit = 50, $optionname = "rclimit" ) {
 596         global $wgUser;
 597
 598         $limit = (int)$_REQUEST['limit'];
 599         if( $limit < 0 ) $limit = 0;
 600         if( ( $limit == 0 ) && ( $optionname != "" ) ) {
 601                 $limit = (int)$wgUser->getOption( $optionname );
 602         }
 603         if( $limit <= 0 ) $limit = $deflimit;
 604         if( $limit > 5000 ) $limit = 5000; # We have *some* limits...
 605
 606         $offset = (int)$_REQUEST['offset'];
 607         $offset = (int)$offset;
 608         if( $offset < 0 ) $offset = 0;
 609         if( $offset > 65000 ) $offset = 65000; # do we need a max? what?
 610
 611         return array( $limit, $offset );
 612 }
 613
 614 # Used in OutputPage::replaceVariables and Article:pstPass2
 615 function replaceMsgVar( $matches ) {
 616         return wfMsg( $matches[1] );
 617 }
 618
 619 function replaceMsgVarNw( $matches ) {
 620         $text = htmlspecialchars( wfMsg( $matches[1] ) );
 621         return $text;
 622 }
 623
 624 ?>