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 # Get a message from anywhere
 154 function wfMsg( $key ) {
 155         $args = func_get_args();
 156         if ( count( $args ) ) {
 157                 array_shift( $args );
 158         }
 159         return wfMsgReal( $key, $args, true );
 160 }
 161
 162 # Get a message from the language file
 163 function wfMsgNoDB( $key ) {
 164         $args = func_get_args();
 165         if ( count( $args ) ) {
 166                 array_shift( $args );
 167         }
 168         return wfMsgReal( $key, $args, false );
 169 }
 170
 171 # Really get a message
 172 function wfMsgReal( $key, $args, $useDB ) {
 173         global $wgLang, $wgReplacementKeys, $wgMemc, $wgDBname;
 174         global $wgUseDatabaseMessages, $wgUseMemCached, $wgOut;
 175         global $wgAllMessagesEn, $wgLanguageCode;
 176
 177         $fname = "wfMsg";
 178         wfProfileIn( $fname );
 179
 180         static $messageCache = false;
 181         $memcKey = "$wgDBname:messages";
 182         $fname = "wfMsg";
 183         $message = false;
 184
 185         # newFromText is too slow!
 186         $title = ucfirst( $key );
 187         if ( $messageCache ) {
 188                 $message = $messageCache[$title];
 189         } elseif ( !$wgUseDatabaseMessages || !$useDB ) {
 190                 $message = $wgLang->getMessage( $key );
 191         }
 192
 193         if ( !$message && $wgUseMemCached ) {
 194                 # Try memcached
 195                 if ( !$messageCache ) {
 196                         $messageCache = $wgMemc->get( $memcKey );
 197                 }
 198
 199                 # If there's nothing in memcached, load all the messages from the database
 200                 # This should only happen on server reset -- ordinary changes should update
 201                 # memcached in editUpdates()
 202                 if ( !$messageCache ) {
 203                         # Other threads don't need to load the messages if another thread is doing it.
 204                         $wgMemc->set( $memcKey, "loading", time() + 60 );
 205                         $messageCache = wfLoadAllMessages();
 206                         # Save in memcached
 207                         $wgMemc->set( $memcKey, $messageCache, time() + 3600 );
 208
 209
 210                 }
 211                 if ( is_array( $messageCache ) && array_key_exists( $title, $messageCache ) ) {
 212                         $message = $messageCache[$title];
 213                 }
 214         }
 215
 216         # If there was no MemCached, load each message from the DB individually
 217         if ( !$message ) {
 218                 if ( $useDB ) {
 219                         $sql = "SELECT cur_text FROM cur WHERE cur_namespace=" . NS_MEDIAWIKI .
 220                                 " AND cur_title='$title'";
 221                         $res = wfQuery( $sql, DB_READ, $fname );
 222
 223                         if ( wfNumRows( $res ) ) {
 224                                 $obj = wfFetchObject( $res );
 225                                 $message = $obj->cur_text;
 226                                 wfFreeResult( $res );
 227                         }
 228                 }
 229         }
 230
 231         # Try the array in $wgLang
 232         if ( !$message ) {
 233                 $message = $wgLang->getMessage( $key );
 234         }
 235
 236         # Try the English array
 237         if ( !$message && $wgLanguageCode != "en" ) {
 238                 $message = Language::getMessage( $key );
 239         }
 240
 241         # Replace arguments
 242         if( count( $args ) ) {
 243                 $message = str_replace( $wgReplacementKeys, $args, $message );
 244         }
 245         wfProfileOut( $fname );
 246         if ( !$message ) {
 247                 # Failed, message does not exist
 248                 return "&lt;$key&gt;";
 249         }
 250         return $message;
 251 }
 252
 253 function wfCleanFormFields( $fields )
 254 {
 255         global $HTTP_POST_VARS;
 256         global $wgInputEncoding, $wgOutputEncoding, $wgEditEncoding, $wgLang;
 257
 258         if ( get_magic_quotes_gpc() ) {
 259                 foreach ( $fields as $fname ) {
 260                         if ( isset( $HTTP_POST_VARS[$fname] ) ) {
 261                                 $HTTP_POST_VARS[$fname] = stripslashes(
 262                                   $HTTP_POST_VARS[$fname] );
 263                         }
 264                         global ${$fname};
 265                         if ( isset( ${$fname} ) ) {
 266                                 ${$fname} = stripslashes( ${$fname} );
 267                         }
 268                 }
 269         }
 270         $enc = $wgOutputEncoding;
 271         if( $wgEditEncoding != "") $enc = $wgEditEncoding;
 272         if ( $enc != $wgInputEncoding ) {
 273                 foreach ( $fields as $fname ) {
 274                         if ( isset( $HTTP_POST_VARS[$fname] ) ) {
 275                                 $HTTP_POST_VARS[$fname] = $wgLang->iconv(
 276                                   $wgOutputEncoding, $wgInputEncoding,
 277                                   $HTTP_POST_VARS[$fname] );
 278                         }
 279                         global ${$fname};
 280                         if ( isset( ${$fname} ) ) {
 281                                 ${$fname} = $wgLang->iconv(
 282                                   $enc, $wgInputEncoding, ${$fname} );
 283                         }
 284                 }
 285         }
 286 }
 287
 288 function wfMungeQuotes( $in )
 289 {
 290         $out = str_replace( "%", "%25", $in );
 291         $out = str_replace( "'", "%27", $out );
 292         $out = str_replace( "\"", "%22", $out );
 293         return $out;
 294 }
 295
 296 function wfDemungeQuotes( $in )
 297 {
 298         $out = str_replace( "%22", "\"", $in );
 299         $out = str_replace( "%27", "'", $out );
 300         $out = str_replace( "%25", "%", $out );
 301         return $out;
 302 }
 303
 304 function wfCleanQueryVar( $var )
 305 {
 306         global $wgLang;
 307         if ( get_magic_quotes_gpc() ) {
 308                 $var = stripslashes( $var );
 309         }
 310         return $wgLang->recodeInput( $var );
 311 }
 312
 313 function wfSpecialPage()
 314 {
 315         global $wgUser, $wgOut, $wgTitle, $wgLang;
 316
 317         /* FIXME: this list probably shouldn't be language-specific, per se */
 318         $validSP = $wgLang->getValidSpecialPages();
 319         $sysopSP = $wgLang->getSysopSpecialPages();
 320         $devSP = $wgLang->getDeveloperSpecialPages();
 321
 322         $wgOut->setArticleFlag( false );
 323         $wgOut->setRobotpolicy( "noindex,follow" );
 324
 325         $par = NULL;
 326         list($t, $par) = split( "/", $wgTitle->getDBkey(), 2 );
 327
 328         if ( array_key_exists( $t, $validSP ) ||
 329           ( $wgUser->isSysop() && array_key_exists( $t, $sysopSP ) ) ||
 330           ( $wgUser->isDeveloper() && array_key_exists( $t, $devSP ) ) ) {
 331                 if($par !== NULL)
 332                         $wgTitle = Title::makeTitle( Namespace::getSpecial(), $t );
 333
 334                 $wgOut->setPageTitle( wfMsg( strtolower( $wgTitle->getText() ) ) );
 335
 336                 $inc = "Special" . $t . ".php";
 337                 include_once( $inc );
 338                 $call = "wfSpecial" . $t;
 339                 $call( $par );
 340         } else if ( array_key_exists( $t, $sysopSP ) ) {
 341                 $wgOut->sysopRequired();
 342         } else if ( array_key_exists( $t, $devSP ) ) {
 343                 $wgOut->developerRequired();
 344         } else {
 345                 $wgOut->errorpage( "nosuchspecialpage", "nospecialpagetext" );
 346         }
 347 }
 348
 349 function wfSearch( $s )
 350 {
 351         $se = new SearchEngine( wfCleanQueryVar( $s ) );
 352         $se->showResults();
 353 }
 354
 355 function wfGo( $s )
 356 { # pick the nearest match
 357         $se = new SearchEngine( wfCleanQueryVar( $s ) );
 358         $se->goResult();
 359 }
 360
 361 function wfNumberOfArticles()
 362 {
 363         global $wgNumberOfArticles;
 364
 365         wfLoadSiteStats();
 366         return $wgNumberOfArticles;
 367 }
 368
 369 /* private */ function wfLoadSiteStats()
 370 {
 371         global $wgNumberOfArticles, $wgTotalViews, $wgTotalEdits;
 372         if ( -1 != $wgNumberOfArticles ) return;
 373
 374         $sql = "SELECT ss_total_views, ss_total_edits, ss_good_articles " .
 375           "FROM site_stats WHERE ss_row_id=1";
 376         $res = wfQuery( $sql, DB_READ, "wfLoadSiteStats" );
 377
 378         if ( 0 == wfNumRows( $res ) ) { return; }
 379         else {
 380                 $s = wfFetchObject( $res );
 381                 $wgTotalViews = $s->ss_total_views;
 382                 $wgTotalEdits = $s->ss_total_edits;
 383                 $wgNumberOfArticles = $s->ss_good_articles;
 384         }
 385 }
 386
 387 function wfEscapeHTML( $in )
 388 {
 389         return str_replace(
 390                 array( "&", "\"", ">", "<" ),
 391                 array( "&amp;", "&quot;", "&gt;", "&lt;" ),
 392                 $in );
 393 }
 394
 395 function wfEscapeHTMLTagsOnly( $in ) {
 396         return str_replace(
 397                 array( "\"", ">", "<" ),
 398                 array( "&quot;", "&gt;", "&lt;" ),
 399                 $in );
 400 }
 401
 402 function wfUnescapeHTML( $in )
 403 {
 404         $in = str_replace( "&lt;", "<", $in );
 405         $in = str_replace( "&gt;", ">", $in );
 406         $in = str_replace( "&quot;", "\"", $in );
 407         $in = str_replace( "&amp;", "&", $in );
 408         return $in;
 409 }
 410
 411 function wfImageDir( $fname )
 412 {
 413         global $wgUploadDirectory;
 414
 415         $hash = md5( $fname );
 416         $oldumask = umask(0);
 417         $dest = $wgUploadDirectory . "/" . $hash{0};
 418         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
 419         $dest .= "/" . substr( $hash, 0, 2 );
 420         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
 421
 422         umask( $oldumask );
 423         return $dest;
 424 }
 425
 426 function wfImageArchiveDir( $fname )
 427 {
 428         global $wgUploadDirectory;
 429
 430         $hash = md5( $fname );
 431         $oldumask = umask(0);
 432         $archive = "{$wgUploadDirectory}/archive";
 433         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 434         $archive .= "/" . $hash{0};
 435         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 436         $archive .= "/" . substr( $hash, 0, 2 );
 437         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 438
 439         umask( $oldumask );
 440         return $archive;
 441 }
 442
 443 function wfRecordUpload( $name, $oldver, $size, $desc )
 444 {
 445         global $wgUser, $wgLang, $wgTitle, $wgOut, $wgDeferredUpdateList;
 446         global $wgUseCopyrightUpload , $wpUploadCopyStatus , $wpUploadSource ;
 447
 448         $fname = "wfRecordUpload";
 449
 450         $sql = "SELECT img_name,img_size,img_timestamp,img_description,img_user," .
 451           "img_user_text FROM image WHERE img_name='" . wfStrencode( $name ) . "'";
 452         $res = wfQuery( $sql, DB_READ, $fname );
 453
 454         $now = wfTimestampNow();
 455         $won = wfInvertTimestamp( $now );
 456
 457         if ( $wgUseCopyrightUpload )
 458           {
 459             $textdesc = "== " . wfMsg ( "filedesc" ) . " ==\n" . $desc . "\n" .
 460               "== " . wfMsg ( "filestatus" ) . " ==\n" . $wpUploadCopyStatus . "\n" .
 461               "== " . wfMsg ( "filesource" ) . " ==\n" . $wpUploadSource ;
 462           }
 463         else $textdesc = $desc ;
 464
 465         if ( 0 == wfNumRows( $res ) ) {
 466                 $sql = "INSERT INTO image (img_name,img_size,img_timestamp," .
 467                   "img_description,img_user,img_user_text) VALUES ('" .
 468                   wfStrencode( $name ) . "',{$size},'{$now}','" .
 469                   wfStrencode( $desc ) . "', '" . $wgUser->getID() .
 470                   "', '" . wfStrencode( $wgUser->getName() ) . "')";
 471                 wfQuery( $sql, DB_WRITE, $fname );
 472
 473                 $sql = "SELECT cur_id,cur_text FROM cur WHERE cur_namespace=" .
 474                   Namespace::getImage() . " AND cur_title='" .
 475                   wfStrencode( $name ) . "'";
 476                 $res = wfQuery( $sql, DB_READ, $fname );
 477                 if ( 0 == wfNumRows( $res ) ) {
 478             $common =
 479                           Namespace::getImage() . ",'" .
 480                           wfStrencode( $name ) . "','" .
 481                           wfStrencode( $desc ) . "','" . $wgUser->getID() . "','" .
 482                           wfStrencode( $wgUser->getName() ) . "','" . $now .
 483                           "',1";
 484                         $sql = "INSERT INTO cur (cur_namespace,cur_title," .
 485                           "cur_comment,cur_user,cur_user_text,cur_timestamp,cur_is_new," .
 486                           "cur_text,inverse_timestamp,cur_touched) VALUES (" .
 487                           $common .
 488                           ",'" . wfStrencode( $textdesc ) . "','{$won}','{$now}')";
 489                         wfQuery( $sql, DB_WRITE, $fname );
 490                         $id = wfInsertId() or 0; # We should throw an error instead
 491                         $sql = "INSERT INTO recentchanges (rc_namespace,rc_title,
 492                                 rc_comment,rc_user,rc_user_text,rc_timestamp,rc_new,
 493                                 rc_cur_id,rc_cur_time) VALUES ({$common},{$id},'{$now}')";
 494             wfQuery( $sql, DB_WRITE, $fname );
 495                         $u = new SearchUpdate( $id, $name, $desc );
 496                         $u->doUpdate();
 497                 }
 498         } else {
 499                 $s = wfFetchObject( $res );
 500
 501                 $sql = "INSERT INTO oldimage (oi_name,oi_archive_name,oi_size," .
 502                   "oi_timestamp,oi_description,oi_user,oi_user_text) VALUES ('" .
 503                   wfStrencode( $s->img_name ) . "','" .
 504                   wfStrencode( $oldver ) .
 505                   "',{$s->img_size},'{$s->img_timestamp}','" .
 506                   wfStrencode( $s->img_description ) . "','" .
 507                   wfStrencode( $s->img_user ) . "','" .
 508                   wfStrencode( $s->img_user_text) . "')";
 509                 wfQuery( $sql, DB_WRITE, $fname );
 510
 511                 $sql = "UPDATE image SET img_size={$size}," .
 512                   "img_timestamp='" . wfTimestampNow() . "',img_user='" .
 513                   $wgUser->getID() . "',img_user_text='" .
 514                   wfStrencode( $wgUser->getName() ) . "', img_description='" .
 515                   wfStrencode( $desc ) . "' WHERE img_name='" .
 516                   wfStrencode( $name ) . "'";
 517                 wfQuery( $sql, DB_WRITE, $fname );
 518
 519                 $sql = "UPDATE cur SET cur_touched='{$now}' WHERE cur_namespace=" .
 520                   Namespace::getImage() . " AND cur_title='" .
 521                   wfStrencode( $name ) . "'";
 522                 wfQuery( $sql, DB_WRITE, $fname );
 523         }
 524
 525         $log = new LogPage( wfMsg( "uploadlogpage" ), wfMsg( "uploadlogpagetext" ) );
 526         $da = str_replace( "$1", "[[:" . $wgLang->getNsText(
 527           Namespace::getImage() ) . ":{$name}|{$name}]]",
 528           wfMsg( "uploadedimage" ) );
 529         $ta = str_replace( "$1", $name, wfMsg( "uploadedimage" ) );
 530         $log->addEntry( $da, $desc, $ta );
 531 }
 532
 533
 534 /* Some generic result counters, pulled out of SearchEngine */
 535
 536 function wfShowingResults( $offset, $limit )
 537 {
 538         $top = str_replace( "$1", $limit, wfMsg( "showingresults" ) );
 539         $top = str_replace( "$2", $offset+1, $top );
 540         return $top;
 541 }
 542
 543 function wfShowingResultsNum( $offset, $limit, $num )
 544 {
 545         $top = str_replace( "$1", $limit, wfMsg( "showingresultsnum" ) );
 546         $top = str_replace( "$2", $offset+1, $top );
 547         $top = str_replace( "$3", $num, $top );
 548         return $top;
 549 }
 550
 551 function wfViewPrevNext( $offset, $limit, $link, $query = "" )
 552 {
 553         global $wgUser;
 554         $prev = str_replace( "$1", $limit, wfMsg( "prevn" ) );
 555         $next = str_replace( "$1", $limit, wfMsg( "nextn" ) );
 556
 557         $sk = $wgUser->getSkin();
 558         if ( 0 != $offset ) {
 559                 $po = $offset - $limit;
 560                 if ( $po < 0 ) { $po = 0; }
 561                 $q = "limit={$limit}&offset={$po}";
 562                 if ( "" != $query ) { $q .= "&{$query}"; }
 563                 $plink = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$prev}</a>";
 564         } else { $plink = $prev; }
 565
 566         $no = $offset + $limit;
 567         $q = "limit={$limit}&offset={$no}";
 568         if ( "" != $query ) { $q .= "&{$query}"; }
 569
 570         $nlink = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$next}</a>";
 571         $nums = wfNumLink( $offset, 20, $link , $query ) . " | " .
 572           wfNumLink( $offset, 50, $link, $query ) . " | " .
 573           wfNumLink( $offset, 100, $link, $query ) . " | " .
 574           wfNumLink( $offset, 250, $link, $query ) . " | " .
 575           wfNumLink( $offset, 500, $link, $query );
 576
 577         $sl = str_replace( "$1", $plink, wfMsg( "viewprevnext" ) );
 578         $sl = str_replace( "$2", $nlink, $sl );
 579         $sl = str_replace( "$3", $nums, $sl );
 580         return $sl;
 581 }
 582
 583 function wfNumLink( $offset, $limit, $link, $query = "" )
 584 {
 585         global $wgUser;
 586         if ( "" == $query ) { $q = ""; }
 587         else { $q = "{$query}&"; }
 588         $q .= "limit={$limit}&offset={$offset}";
 589
 590         $s = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$limit}</a>";
 591         return $s;
 592 }
 593
 594 function wfClientAcceptsGzip() {
 595         global $wgUseGzip;
 596         if( $wgUseGzip ) {
 597                 # FIXME: we may want to blacklist some broken browsers
 598                 if( preg_match(
 599                         '/\bgzip(?:;(q)=([0-9]+(?:\.[0-9]+)))?\b/',
 600                         $_SERVER["HTTP_ACCEPT_ENCODING"],
 601                         $m ) ) {
 602                         if( ( $m[1] == "q" ) && ( $m[2] == 0 ) ) return false;
 603                         wfDebug( " accepts gzip\n" );
 604                         return true;
 605                 }
 606         }
 607         return false;
 608 }
 609
 610 # Yay, more global functions!
 611 function wfCheckLimits( $deflimit = 50, $optionname = "rclimit" ) {
 612         global $wgUser;
 613
 614         $limit = (int)$_REQUEST['limit'];
 615         if( $limit < 0 ) $limit = 0;
 616         if( ( $limit == 0 ) && ( $optionname != "" ) ) {
 617                 $limit = (int)$wgUser->getOption( $optionname );
 618         }
 619         if( $limit <= 0 ) $limit = $deflimit;
 620         if( $limit > 5000 ) $limit = 5000; # We have *some* limits...
 621
 622         $offset = (int)$_REQUEST['offset'];
 623         $offset = (int)$offset;
 624         if( $offset < 0 ) $offset = 0;
 625         if( $offset > 65000 ) $offset = 65000; # do we need a max? what?
 626
 627         return array( $limit, $offset );
 628 }
 629
 630 # Escapes the given text so that it may be output using addWikiText()
 631 # without any linking, formatting, etc. making its way through. This
 632 # is achieved by substituting certain characters with HTML entities.
 633 # As required by the callers, <nowiki> is not used. It currently does
 634 # not filter out characters which have special meaning only at the
 635 # start of a line, such as "*".
 636 function wfEscapeWikiText( $text )
 637 {
 638         $text = str_replace(
 639                 array( '[',     "'",     'ISBN '    , '://'),
 640                 array( '&#91;', '&#39;', 'ISBN&#32;', '&#58;//'),
 641                 htmlspecialchars($text) );
 642         return $text;
 643 }
 644
 645 # Loads the entire MediaWiki namespace, retuns the array
 646 function wfLoadAllMessages()
 647 {
 648         $sql = "SELECT cur_title,cur_text FROM cur WHERE cur_namespace=" . NS_MEDIAWIKI;
 649         $res = wfQuery( $sql, DB_READ, $fname );
 650
 651         $messages = array();
 652         for ( $row = wfFetchObject( $res ); $row; $row = wfFetchObject( $res ) ) {
 653                 $messages[$row->cur_title] = $row->cur_text;
 654         }
 655         wfFreeResult( $res );
 656         return $messages;
 657 }
 658 ?>