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         wfProfileIn( $fname );
 176         $message = false;
 177         $l1hit = false;
 178
 179         # Check for DB suppression
 180         if ( !$wgUseDatabaseMessages || !$useDB ) {
 181                 $message = $wgLang->getMessage( $key );
 182         }
 183
 184         # Try L1 cache
 185         if ( $message === false && array_key_exists( $key, $l1cache ) ) {
 186                 $message  = $l1cache[$key];
 187                 if ( $message === false ) {
 188                         $message = $wgLang->getMessage( $key );
 189                 }
 190                 $l1hit = true;
 191         }
 192
 193         # Try memcached
 194         if ( $message === false ) {
 195                 $titleObj = Title::newFromText( $key );
 196                 $title = $titleObj->getDBkey();
 197                 $mcKey = "$wgDBname:MediaWiki:title:$title";
 198                 $message = $wgMemc->get( $mcKey );
 199         }
 200
 201         # Try database
 202         if ( $message === false) {
 203                 if ( $useDB ) {
 204                         $sql = "SELECT cur_text FROM cur WHERE cur_namespace=" . NS_MEDIAWIKI .
 205                                 " AND cur_title='$title'";
 206                         $res = wfQuery( $sql, DB_READ, $fname );
 207
 208                         if ( wfNumRows( $res ) ) {
 209                                 # Got it from the database, now store in MemCached
 210                                 $obj = wfFetchObject( $res );
 211                                 $message = $obj->cur_text;
 212                                 wfFreeResult( $res );
 213                                 $wgMemc->set( $mcKey, $message, 0 /*time() + 1800*/ );
 214                         }
 215                 }
 216         }
 217
 218         # Finally, try the array in $wgLang
 219         if ( $message === false ) {
 220                 $message = $wgLang->getMessage( $key );
 221                 $l1cache[$key] = false;
 222         } elseif ( !$l1hit && $wgUseDatabaseMessages) {
 223                 $l1cache[$key] = $message;
 224         }
 225
 226         # Replace arguments
 227         if( count( $args ) ) {
 228                 $message = str_replace( $wgReplacementKeys, $args, $message );
 229         }
 230
 231         wfProfileOut( $fname );
 232
 233         if ( "" == $message ) {
 234                 # Failed, message not translated
 235                 return "&lt;$key&gt;";
 236         }
 237         return $message;
 238 }
 239
 240 function wfCleanFormFields( $fields )
 241 {
 242         global $HTTP_POST_VARS;
 243         global $wgInputEncoding, $wgOutputEncoding, $wgEditEncoding, $wgLang;
 244
 245         if ( get_magic_quotes_gpc() ) {
 246                 foreach ( $fields as $fname ) {
 247                         if ( isset( $HTTP_POST_VARS[$fname] ) ) {
 248                                 $HTTP_POST_VARS[$fname] = stripslashes(
 249                                   $HTTP_POST_VARS[$fname] );
 250                         }
 251                         global ${$fname};
 252                         if ( isset( ${$fname} ) ) {
 253                                 ${$fname} = stripslashes( ${$fname} );
 254                         }
 255                 }
 256         }
 257         $enc = $wgOutputEncoding;
 258         if( $wgEditEncoding != "") $enc = $wgEditEncoding;
 259         if ( $enc != $wgInputEncoding ) {
 260                 foreach ( $fields as $fname ) {
 261                         if ( isset( $HTTP_POST_VARS[$fname] ) ) {
 262                                 $HTTP_POST_VARS[$fname] = $wgLang->iconv(
 263                                   $wgOutputEncoding, $wgInputEncoding,
 264                                   $HTTP_POST_VARS[$fname] );
 265                         }
 266                         global ${$fname};
 267                         if ( isset( ${$fname} ) ) {
 268                                 ${$fname} = $wgLang->iconv(
 269                                   $enc, $wgInputEncoding, ${$fname} );
 270                         }
 271                 }
 272         }
 273 }
 274
 275 function wfMungeQuotes( $in )
 276 {
 277         $out = str_replace( "%", "%25", $in );
 278         $out = str_replace( "'", "%27", $out );
 279         $out = str_replace( "\"", "%22", $out );
 280         return $out;
 281 }
 282
 283 function wfDemungeQuotes( $in )
 284 {
 285         $out = str_replace( "%22", "\"", $in );
 286         $out = str_replace( "%27", "'", $out );
 287         $out = str_replace( "%25", "%", $out );
 288         return $out;
 289 }
 290
 291 function wfCleanQueryVar( $var )
 292 {
 293         global $wgLang;
 294         if ( get_magic_quotes_gpc() ) {
 295                 $var = stripslashes( $var );
 296         }
 297         return $wgLang->recodeInput( $var );
 298 }
 299
 300 function wfSpecialPage()
 301 {
 302         global $wgUser, $wgOut, $wgTitle, $wgLang;
 303
 304         /* FIXME: this list probably shouldn't be language-specific, per se */
 305         $validSP = $wgLang->getValidSpecialPages();
 306         $sysopSP = $wgLang->getSysopSpecialPages();
 307         $devSP = $wgLang->getDeveloperSpecialPages();
 308
 309         $wgOut->setArticleFlag( false );
 310         $wgOut->setRobotpolicy( "noindex,follow" );
 311
 312         $par = NULL;
 313         list($t, $par) = split( "/", $wgTitle->getDBkey(), 2 );
 314
 315         if ( array_key_exists( $t, $validSP ) ||
 316           ( $wgUser->isSysop() && array_key_exists( $t, $sysopSP ) ) ||
 317           ( $wgUser->isDeveloper() && array_key_exists( $t, $devSP ) ) ) {
 318                 if($par !== NULL)
 319                         $wgTitle = Title::makeTitle( Namespace::getSpecial(), $t );
 320
 321                 $wgOut->setPageTitle( wfMsg( strtolower( $wgTitle->getText() ) ) );
 322
 323                 $inc = "Special" . $t . ".php";
 324                 include_once( $inc );
 325                 $call = "wfSpecial" . $t;
 326                 $call( $par );
 327         } else if ( array_key_exists( $t, $sysopSP ) ) {
 328                 $wgOut->sysopRequired();
 329         } else if ( array_key_exists( $t, $devSP ) ) {
 330                 $wgOut->developerRequired();
 331         } else {
 332                 $wgOut->errorpage( "nosuchspecialpage", "nospecialpagetext" );
 333         }
 334 }
 335
 336 function wfSearch( $s )
 337 {
 338         $se = new SearchEngine( wfCleanQueryVar( $s ) );
 339         $se->showResults();
 340 }
 341
 342 function wfGo( $s )
 343 { # pick the nearest match
 344         $se = new SearchEngine( wfCleanQueryVar( $s ) );
 345         $se->goResult();
 346 }
 347
 348 function wfNumberOfArticles()
 349 {
 350         global $wgNumberOfArticles;
 351
 352         wfLoadSiteStats();
 353         return $wgNumberOfArticles;
 354 }
 355
 356 /* private */ function wfLoadSiteStats()
 357 {
 358         global $wgNumberOfArticles, $wgTotalViews, $wgTotalEdits;
 359         if ( -1 != $wgNumberOfArticles ) return;
 360
 361         $sql = "SELECT ss_total_views, ss_total_edits, ss_good_articles " .
 362           "FROM site_stats WHERE ss_row_id=1";
 363         $res = wfQuery( $sql, DB_READ, "wfLoadSiteStats" );
 364
 365         if ( 0 == wfNumRows( $res ) ) { return; }
 366         else {
 367                 $s = wfFetchObject( $res );
 368                 $wgTotalViews = $s->ss_total_views;
 369                 $wgTotalEdits = $s->ss_total_edits;
 370                 $wgNumberOfArticles = $s->ss_good_articles;
 371         }
 372 }
 373
 374 function wfEscapeHTML( $in )
 375 {
 376         return str_replace(
 377                 array( "&", "\"", ">", "<" ),
 378                 array( "&amp;", "&quot;", "&gt;", "&lt;" ),
 379                 $in );
 380 }
 381
 382 function wfEscapeHTMLTagsOnly( $in ) {
 383         return str_replace(
 384                 array( "\"", ">", "<" ),
 385                 array( "&quot;", "&gt;", "&lt;" ),
 386                 $in );
 387 }
 388
 389 function wfUnescapeHTML( $in )
 390 {
 391         $in = str_replace( "&lt;", "<", $in );
 392         $in = str_replace( "&gt;", ">", $in );
 393         $in = str_replace( "&quot;", "\"", $in );
 394         $in = str_replace( "&amp;", "&", $in );
 395         return $in;
 396 }
 397
 398 function wfImageDir( $fname )
 399 {
 400         global $wgUploadDirectory;
 401
 402         $hash = md5( $fname );
 403         $oldumask = umask(0);
 404         $dest = $wgUploadDirectory . "/" . $hash{0};
 405         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
 406         $dest .= "/" . substr( $hash, 0, 2 );
 407         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
 408
 409         umask( $oldumask );
 410         return $dest;
 411 }
 412
 413 function wfImageArchiveDir( $fname )
 414 {
 415         global $wgUploadDirectory;
 416
 417         $hash = md5( $fname );
 418         $oldumask = umask(0);
 419         $archive = "{$wgUploadDirectory}/archive";
 420         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 421         $archive .= "/" . $hash{0};
 422         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 423         $archive .= "/" . substr( $hash, 0, 2 );
 424         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 425
 426         umask( $oldumask );
 427         return $archive;
 428 }
 429
 430 function wfRecordUpload( $name, $oldver, $size, $desc )
 431 {
 432         global $wgUser, $wgLang, $wgTitle, $wgOut, $wgDeferredUpdateList;
 433         global $wgUseCopyrightUpload , $wpUploadCopyStatus , $wpUploadSource ;
 434
 435         $fname = "wfRecordUpload";
 436
 437         $sql = "SELECT img_name,img_size,img_timestamp,img_description,img_user," .
 438           "img_user_text FROM image WHERE img_name='" . wfStrencode( $name ) . "'";
 439         $res = wfQuery( $sql, DB_READ, $fname );
 440
 441         $now = wfTimestampNow();
 442         $won = wfInvertTimestamp( $now );
 443
 444         if ( $wgUseCopyrightUpload )
 445           {
 446             $textdesc = "== " . wfMsg ( "filedesc" ) . " ==\n" . $desc . "\n" .
 447               "== " . wfMsg ( "filestatus" ) . " ==\n" . $wpUploadCopyStatus . "\n" .
 448               "== " . wfMsg ( "filesource" ) . " ==\n" . $wpUploadSource ;
 449           }
 450         else $textdesc = $desc ;
 451
 452         if ( 0 == wfNumRows( $res ) ) {
 453                 $sql = "INSERT INTO image (img_name,img_size,img_timestamp," .
 454                   "img_description,img_user,img_user_text) VALUES ('" .
 455                   wfStrencode( $name ) . "',{$size},'{$now}','" .
 456                   wfStrencode( $desc ) . "', '" . $wgUser->getID() .
 457                   "', '" . wfStrencode( $wgUser->getName() ) . "')";
 458                 wfQuery( $sql, DB_WRITE, $fname );
 459
 460                 $sql = "SELECT cur_id,cur_text FROM cur WHERE cur_namespace=" .
 461                   Namespace::getImage() . " AND cur_title='" .
 462                   wfStrencode( $name ) . "'";
 463                 $res = wfQuery( $sql, DB_READ, $fname );
 464                 if ( 0 == wfNumRows( $res ) ) {
 465             $common =
 466                           Namespace::getImage() . ",'" .
 467                           wfStrencode( $name ) . "','" .
 468                           wfStrencode( $desc ) . "','" . $wgUser->getID() . "','" .
 469                           wfStrencode( $wgUser->getName() ) . "','" . $now .
 470                           "',1";
 471                         $sql = "INSERT INTO cur (cur_namespace,cur_title," .
 472                           "cur_comment,cur_user,cur_user_text,cur_timestamp,cur_is_new," .
 473                           "cur_text,inverse_timestamp,cur_touched) VALUES (" .
 474                           $common .
 475                           ",'" . wfStrencode( $textdesc ) . "','{$won}','{$now}')";
 476                         wfQuery( $sql, DB_WRITE, $fname );
 477                         $id = wfInsertId() or 0; # We should throw an error instead
 478                         $sql = "INSERT INTO recentchanges (rc_namespace,rc_title,
 479                                 rc_comment,rc_user,rc_user_text,rc_timestamp,rc_new,
 480                                 rc_cur_id,rc_cur_time) VALUES ({$common},{$id},'{$now}')";
 481             wfQuery( $sql, DB_WRITE, $fname );
 482                         $u = new SearchUpdate( $id, $name, $desc );
 483                         $u->doUpdate();
 484                 }
 485         } else {
 486                 $s = wfFetchObject( $res );
 487
 488                 $sql = "INSERT INTO oldimage (oi_name,oi_archive_name,oi_size," .
 489                   "oi_timestamp,oi_description,oi_user,oi_user_text) VALUES ('" .
 490                   wfStrencode( $s->img_name ) . "','" .
 491                   wfStrencode( $oldver ) .
 492                   "',{$s->img_size},'{$s->img_timestamp}','" .
 493                   wfStrencode( $s->img_description ) . "','" .
 494                   wfStrencode( $s->img_user ) . "','" .
 495                   wfStrencode( $s->img_user_text) . "')";
 496                 wfQuery( $sql, DB_WRITE, $fname );
 497
 498                 $sql = "UPDATE image SET img_size={$size}," .
 499                   "img_timestamp='" . wfTimestampNow() . "',img_user='" .
 500                   $wgUser->getID() . "',img_user_text='" .
 501                   wfStrencode( $wgUser->getName() ) . "', img_description='" .
 502                   wfStrencode( $desc ) . "' WHERE img_name='" .
 503                   wfStrencode( $name ) . "'";
 504                 wfQuery( $sql, DB_WRITE, $fname );
 505
 506                 $sql = "UPDATE cur SET cur_touched='{$now}' WHERE cur_namespace=" .
 507                   Namespace::getImage() . " AND cur_title='" .
 508                   wfStrencode( $name ) . "'";
 509                 wfQuery( $sql, DB_WRITE, $fname );
 510         }
 511
 512         $log = new LogPage( wfMsg( "uploadlogpage" ), wfMsg( "uploadlogpagetext" ) );
 513         $da = str_replace( "$1", "[[:" . $wgLang->getNsText(
 514           Namespace::getImage() ) . ":{$name}|{$name}]]",
 515           wfMsg( "uploadedimage" ) );
 516         $ta = str_replace( "$1", $name, wfMsg( "uploadedimage" ) );
 517         $log->addEntry( $da, $desc, $ta );
 518 }
 519
 520
 521 /* Some generic result counters, pulled out of SearchEngine */
 522
 523 function wfShowingResults( $offset, $limit )
 524 {
 525         $top = str_replace( "$1", $limit, wfMsg( "showingresults" ) );
 526         $top = str_replace( "$2", $offset+1, $top );
 527         return $top;
 528 }
 529
 530 function wfShowingResultsNum( $offset, $limit, $num )
 531 {
 532         $top = str_replace( "$1", $limit, wfMsg( "showingresultsnum" ) );
 533         $top = str_replace( "$2", $offset+1, $top );
 534         $top = str_replace( "$3", $num, $top );
 535         return $top;
 536 }
 537
 538 function wfViewPrevNext( $offset, $limit, $link, $query = "" )
 539 {
 540         global $wgUser;
 541         $prev = str_replace( "$1", $limit, wfMsg( "prevn" ) );
 542         $next = str_replace( "$1", $limit, wfMsg( "nextn" ) );
 543
 544         $sk = $wgUser->getSkin();
 545         if ( 0 != $offset ) {
 546                 $po = $offset - $limit;
 547                 if ( $po < 0 ) { $po = 0; }
 548                 $q = "limit={$limit}&offset={$po}";
 549                 if ( "" != $query ) { $q .= "&{$query}"; }
 550                 $plink = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$prev}</a>";
 551         } else { $plink = $prev; }
 552
 553         $no = $offset + $limit;
 554         $q = "limit={$limit}&offset={$no}";
 555         if ( "" != $query ) { $q .= "&{$query}"; }
 556
 557         $nlink = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$next}</a>";
 558         $nums = wfNumLink( $offset, 20, $link , $query ) . " | " .
 559           wfNumLink( $offset, 50, $link, $query ) . " | " .
 560           wfNumLink( $offset, 100, $link, $query ) . " | " .
 561           wfNumLink( $offset, 250, $link, $query ) . " | " .
 562           wfNumLink( $offset, 500, $link, $query );
 563
 564         $sl = str_replace( "$1", $plink, wfMsg( "viewprevnext" ) );
 565         $sl = str_replace( "$2", $nlink, $sl );
 566         $sl = str_replace( "$3", $nums, $sl );
 567         return $sl;
 568 }
 569
 570 function wfNumLink( $offset, $limit, $link, $query = "" )
 571 {
 572         global $wgUser;
 573         if ( "" == $query ) { $q = ""; }
 574         else { $q = "{$query}&"; }
 575         $q .= "limit={$limit}&offset={$offset}";
 576
 577         $s = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$limit}</a>";
 578         return $s;
 579 }
 580
 581 function wfClientAcceptsGzip() {
 582         global $wgUseGzip;
 583         if( $wgUseGzip ) {
 584                 # FIXME: we may want to blacklist some broken browsers
 585                 if( preg_match(
 586                         '/\bgzip(?:;(q)=([0-9]+(?:\.[0-9]+)))?\b/',
 587                         $_SERVER["HTTP_ACCEPT_ENCODING"],
 588                         $m ) ) {
 589                         if( ( $m[1] == "q" ) && ( $m[2] == 0 ) ) return false;
 590                         wfDebug( " accepts gzip\n" );
 591                         return true;
 592                 }
 593         }
 594         return false;
 595 }
 596
 597 # Yay, more global functions!
 598 function wfCheckLimits( $deflimit = 50, $optionname = "rclimit" ) {
 599         global $wgUser;
 600
 601         $limit = (int)$_REQUEST['limit'];
 602         if( $limit < 0 ) $limit = 0;
 603         if( ( $limit == 0 ) && ( $optionname != "" ) ) {
 604                 $limit = (int)$wgUser->getOption( $optionname );
 605         }
 606         if( $limit <= 0 ) $limit = $deflimit;
 607         if( $limit > 5000 ) $limit = 5000; # We have *some* limits...
 608
 609         $offset = (int)$_REQUEST['offset'];
 610         $offset = (int)$offset;
 611         if( $offset < 0 ) $offset = 0;
 612         if( $offset > 65000 ) $offset = 65000; # do we need a max? what?
 613
 614         return array( $limit, $offset );
 615 }
 616
 617 # Used in OutputPage::replaceVariables and Article:pstPass2
 618 function replaceMsgVar( $matches ) {
 619         return wfMsg( $matches[1] );
 620 }
 621
 622 function replaceMsgVarNw( $matches ) {
 623         $text = htmlspecialchars( wfMsg( $matches[1] ) );
 624         return $text;
 625 }
 626
 627 ?>