includes/GlobalFunctions.php

   1 <?
   2 # Global functions used everywhere
   3
   4 $wgNumberOfArticles = -1; # Unset
   5 $wgTotalViews = -1;
   6 $wgTotalEdits = -1;
   7
   8 include_once( "DatabaseFunctions.php" );
   9 include_once( "UpdateClasses.php" );
  10 include_once( "LogPage.php" );
  11
  12 /*
  13  * Compatibility functions
  14  */
  15
  16 # PHP <4.3.x is not actively supported; 4.1.x and 4.2.x might or might not work.
  17 # <4.1.x will not work, as we use a number of features introduced in 4.1.0
  18 # such as the new autoglobals.
  19
  20 if( !function_exists('iconv') ) {
  21         # iconv support is not in the default configuration and so may not be present.
  22         # Assume will only ever use utf-8 and iso-8859-1.
  23         # This will *not* work in all circumstances.
  24         function iconv( $from, $to, $string ) {
  25                 if(strcasecmp( $from, $to ) == 0) return $string;
  26                 if(strcasecmp( $from, "utf-8" ) == 0) return utf8_decode( $string );
  27                 if(strcasecmp( $to, "utf-8" ) == 0) return utf8_encode( $string );
  28                 return $string;
  29         }
  30 }
  31
  32 if( !function_exists('file_get_contents') ) {
  33         # Exists in PHP 4.3.0+
  34         function file_get_contents( $filename ) {
  35                 return implode( "", file( $filename ) );
  36         }
  37 }
  38
  39 $wgRandomSeeded = false;
  40
  41 function wfSeedRandom()
  42 {
  43         global $wgRandomSeeded;
  44
  45         if ( ! $wgRandomSeeded ) {
  46                 $seed = hexdec(substr(md5(microtime()),-8)) & 0x7fffffff;
  47                 mt_srand( $seed );
  48                 $wgRandomSeeded = true;
  49         }
  50 }
  51
  52 function wfLocalUrl( $a, $q = "" )
  53 {
  54         global $wgServer, $wgScript, $wgArticlePath;
  55
  56         $a = str_replace( " ", "_", $a );
  57         #$a = wfUrlencode( $a ); # This stuff is _already_ URL-encoded.
  58
  59         if ( "" == $a ) {
  60                 if( "" == $q ) {
  61                         $a = $wgScript;
  62                 } else {
  63                         $a = "{$wgScript}?{$q}";
  64                 }
  65         } else if ( "" == $q ) {
  66                 $a = str_replace( "$1", $a, $wgArticlePath );
  67         } else {
  68                 $a = "{$wgScript}?title={$a}&{$q}";
  69         }
  70         return $a;
  71 }
  72
  73 function wfLocalUrlE( $a, $q = "" )
  74 {
  75         return wfEscapeHTML( wfLocalUrl( $a, $q ) );
  76 }
  77
  78 function wfFullUrl( $a, $q = "" ) {
  79         global $wgServer;
  80         return $wgServer . wfLocalUrl( $a, $q );
  81 }
  82
  83 function wfFullUrlE( $a, $q = "" ) {
  84         return wfEscapeHTML( wfFullUrl( $a, $q ) );
  85 }
  86
  87 function wfImageUrl( $img )
  88 {
  89         global $wgUploadPath;
  90
  91         $nt = Title::newFromText( $img );
  92         if( !$nt ) return "";
  93
  94         $name = $nt->getDBkey();
  95         $hash = md5( $name );
  96
  97         $url = "{$wgUploadPath}/" . $hash{0} . "/" .
  98           substr( $hash, 0, 2 ) . "/{$name}";
  99         return wfUrlencode( $url );
 100 }
 101
 102 function wfImageArchiveUrl( $name )
 103 {
 104         global $wgUploadPath;
 105
 106         $hash = md5( substr( $name, 15) );
 107         $url = "{$wgUploadPath}/archive/" . $hash{0} . "/" .
 108           substr( $hash, 0, 2 ) . "/{$name}";
 109         return $url;
 110 }
 111
 112 function wfUrlencode ( $s )
 113 {
 114         $ulink = urlencode( $s );
 115         $ulink = preg_replace( "/%3[Aa]/", ":", $ulink );
 116         $ulink = preg_replace( "/%2[Ff]/", "/", $ulink );
 117         return $ulink;
 118 }
 119
 120 function wfUtf8Sequence($codepoint) {
 121         if($codepoint <     0x80) return chr($codepoint);
 122         if($codepoint <    0x800) return chr($codepoint >>  6 & 0x3f | 0xc0) .
 123                                      chr($codepoint       & 0x3f | 0x80);
 124     if($codepoint <  0x10000) return chr($codepoint >> 12 & 0x0f | 0xe0) .
 125                                      chr($codepoint >>  6 & 0x3f | 0x80) .
 126                                      chr($codepoint       & 0x3f | 0x80);
 127         if($codepoint < 0x100000) return chr($codepoint >> 18 & 0x07 | 0xf0) . # Double-check this
 128                                          chr($codepoint >> 12 & 0x3f | 0x80) .
 129                                      chr($codepoint >>  6 & 0x3f | 0x80) .
 130                                      chr($codepoint       & 0x3f | 0x80);
 131         # Doesn't yet handle outside the BMP
 132         return "&#$codepoint;";
 133 }
 134
 135 function wfMungeToUtf8($string) {
 136         global $wgInputEncoding; # This is debatable
 137         #$string = iconv($wgInputEncoding, "UTF-8", $string);
 138         $string = preg_replace ( '/&#([0-9]+);/e', 'wfUtf8Sequence($1)', $string );
 139         $string = preg_replace ( '/&#x([0-9a-f]+);/ie', 'wfUtf8Sequence(0x$1)', $string );
 140         # Should also do named entities here
 141         return $string;
 142 }
 143
 144 function wfDebug( $text, $logonly = false )
 145 {
 146         global $wgOut, $wgDebugLogFile, $wgDebugComments, $wgProfileOnly;
 147
 148         if ( $wgDebugComments && !$logonly ) {
 149                 $wgOut->debug( $text );
 150         }
 151         if ( "" != $wgDebugLogFile && !$wgProfileOnly ) {
 152                 error_log( $text, 3, $wgDebugLogFile );
 153         }
 154 }
 155
 156 function wfReadOnly()
 157 {
 158         global $wgReadOnlyFile;
 159
 160         if ( "" == $wgReadOnlyFile ) { return false; }
 161         return is_file( $wgReadOnlyFile );
 162 }
 163
 164 $wgReplacementKeys = array( "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9" );
 165
 166 # Get a message from anywhere
 167 function wfMsg( $key ) {
 168         $args = func_get_args();
 169         if ( count( $args ) ) {
 170                 array_shift( $args );
 171         }
 172         return wfMsgReal( $key, $args, true );
 173 }
 174
 175 # Get a message from the language file
 176 function wfMsgNoDB( $key ) {
 177         $args = func_get_args();
 178         if ( count( $args ) ) {
 179                 array_shift( $args );
 180         }
 181         return wfMsgReal( $key, $args, false );
 182 }
 183
 184 # Really get a message
 185 function wfMsgReal( $key, $args, $useDB ) {
 186         global $wgLang, $wgReplacementKeys, $wgMemc, $wgDBname;
 187         global $wgUseDatabaseMessages, $wgUseMemCached, $wgOut;
 188         global $wgAllMessagesEn, $wgLanguageCode;
 189
 190         $fname = "wfMsg";
 191         wfProfileIn( $fname );
 192
 193         static $messageCache = false;
 194         $memcKey = "$wgDBname:messages";
 195         $fname = "wfMsg";
 196         $message = false;
 197
 198         # newFromText is too slow!
 199         $title = ucfirst( $key );
 200         if ( $messageCache ) {
 201                 $message = $messageCache[$title];
 202         } elseif ( !$wgUseDatabaseMessages || !$useDB ) {
 203                 $message = $wgLang->getMessage( $key );
 204         }
 205
 206         if ( !$message && $wgUseMemCached ) {
 207                 # Try memcached
 208                 if ( !$messageCache ) {
 209                         $messageCache = $wgMemc->get( $memcKey );
 210                 }
 211
 212                 # If there's nothing in memcached, load all the messages from the database
 213                 # This should only happen on server reset -- ordinary changes should update
 214                 # memcached in editUpdates()
 215                 if ( !$messageCache ) {
 216                         # Other threads don't need to load the messages if another thread is doing it.
 217                         $wgMemc->set( $memcKey, "loading", time() + 60 );
 218                         $messageCache = wfLoadAllMessages();
 219                         # Save in memcached
 220                         $wgMemc->set( $memcKey, $messageCache, time() + 3600 );
 221
 222
 223                 }
 224                 if ( is_array( $messageCache ) && array_key_exists( $title, $messageCache ) ) {
 225                         $message = $messageCache[$title];
 226                 } elseif ( $messageCache == "loading" ) {
 227                         $messageCache = false;
 228                 }
 229         }
 230
 231         # If there was no MemCached, load each message from the DB individually
 232         if ( !$message ) {
 233                 if ( $useDB ) {
 234                         $sql = "SELECT cur_text FROM cur WHERE cur_namespace=" . NS_MEDIAWIKI .
 235                                 " AND cur_title='$title'";
 236                         $res = wfQuery( $sql, DB_READ, $fname );
 237
 238                         if ( wfNumRows( $res ) ) {
 239                                 $obj = wfFetchObject( $res );
 240                                 $message = $obj->cur_text;
 241                                 wfFreeResult( $res );
 242                         }
 243                 }
 244         }
 245
 246         # Try the array in $wgLang
 247         if ( !$message ) {
 248                 $message = $wgLang->getMessage( $key );
 249         }
 250
 251         # Try the English array
 252         if ( !$message && $wgLanguageCode != "en" ) {
 253                 $message = Language::getMessage( $key );
 254         }
 255
 256         # Replace arguments
 257         if( count( $args ) ) {
 258                 $message = str_replace( $wgReplacementKeys, $args, $message );
 259         }
 260         wfProfileOut( $fname );
 261         if ( !$message ) {
 262                 # Failed, message does not exist
 263                 return "&lt;$key&gt;";
 264         }
 265         return $message;
 266 }
 267
 268 function wfCleanFormFields( $fields )
 269 {
 270         global $HTTP_POST_VARS;
 271         global $wgInputEncoding, $wgOutputEncoding, $wgEditEncoding, $wgLang;
 272
 273         if ( get_magic_quotes_gpc() ) {
 274                 foreach ( $fields as $fname ) {
 275                         if ( isset( $HTTP_POST_VARS[$fname] ) ) {
 276                                 $HTTP_POST_VARS[$fname] = stripslashes(
 277                                   $HTTP_POST_VARS[$fname] );
 278                         }
 279                         global ${$fname};
 280                         if ( isset( ${$fname} ) ) {
 281                                 ${$fname} = stripslashes( ${$fname} );
 282                         }
 283                 }
 284         }
 285         $enc = $wgOutputEncoding;
 286         if( $wgEditEncoding != "") $enc = $wgEditEncoding;
 287         if ( $enc != $wgInputEncoding ) {
 288                 foreach ( $fields as $fname ) {
 289                         if ( isset( $HTTP_POST_VARS[$fname] ) ) {
 290                                 $HTTP_POST_VARS[$fname] = $wgLang->iconv(
 291                                   $wgOutputEncoding, $wgInputEncoding,
 292                                   $HTTP_POST_VARS[$fname] );
 293                         }
 294                         global ${$fname};
 295                         if ( isset( ${$fname} ) ) {
 296                                 ${$fname} = $wgLang->iconv(
 297                                   $enc, $wgInputEncoding, ${$fname} );
 298                         }
 299                 }
 300         }
 301 }
 302
 303 function wfMungeQuotes( $in )
 304 {
 305         $out = str_replace( "%", "%25", $in );
 306         $out = str_replace( "'", "%27", $out );
 307         $out = str_replace( "\"", "%22", $out );
 308         return $out;
 309 }
 310
 311 function wfDemungeQuotes( $in )
 312 {
 313         $out = str_replace( "%22", "\"", $in );
 314         $out = str_replace( "%27", "'", $out );
 315         $out = str_replace( "%25", "%", $out );
 316         return $out;
 317 }
 318
 319 function wfCleanQueryVar( $var )
 320 {
 321         global $wgLang;
 322         if ( get_magic_quotes_gpc() ) {
 323                 $var = stripslashes( $var );
 324         }
 325         return $wgLang->recodeInput( $var );
 326 }
 327
 328 function wfSpecialPage()
 329 {
 330         global $wgUser, $wgOut, $wgTitle, $wgLang;
 331
 332         /* FIXME: this list probably shouldn't be language-specific, per se */
 333         $validSP = $wgLang->getValidSpecialPages();
 334         $sysopSP = $wgLang->getSysopSpecialPages();
 335         $devSP = $wgLang->getDeveloperSpecialPages();
 336
 337         $wgOut->setArticleFlag( false );
 338         $wgOut->setRobotpolicy( "noindex,follow" );
 339
 340         $par = NULL;
 341         list($t, $par) = split( "/", $wgTitle->getDBkey(), 2 );
 342
 343         if ( array_key_exists( $t, $validSP ) ||
 344           ( $wgUser->isSysop() && array_key_exists( $t, $sysopSP ) ) ||
 345           ( $wgUser->isDeveloper() && array_key_exists( $t, $devSP ) ) ) {
 346                 if($par !== NULL)
 347                         $wgTitle = Title::makeTitle( Namespace::getSpecial(), $t );
 348
 349                 $wgOut->setPageTitle( wfMsg( strtolower( $wgTitle->getText() ) ) );
 350
 351                 $inc = "Special" . $t . ".php";
 352                 include_once( $inc );
 353                 $call = "wfSpecial" . $t;
 354                 $call( $par );
 355         } else if ( array_key_exists( $t, $sysopSP ) ) {
 356                 $wgOut->sysopRequired();
 357         } else if ( array_key_exists( $t, $devSP ) ) {
 358                 $wgOut->developerRequired();
 359         } else {
 360                 $wgOut->errorpage( "nosuchspecialpage", "nospecialpagetext" );
 361         }
 362 }
 363
 364 function wfSearch( $s )
 365 {
 366         $se = new SearchEngine( wfCleanQueryVar( $s ) );
 367         $se->showResults();
 368 }
 369
 370 function wfGo( $s )
 371 { # pick the nearest match
 372         $se = new SearchEngine( wfCleanQueryVar( $s ) );
 373         $se->goResult();
 374 }
 375
 376 function wfNumberOfArticles()
 377 {
 378         global $wgNumberOfArticles;
 379
 380         wfLoadSiteStats();
 381         return $wgNumberOfArticles;
 382 }
 383
 384 /* private */ function wfLoadSiteStats()
 385 {
 386         global $wgNumberOfArticles, $wgTotalViews, $wgTotalEdits;
 387         if ( -1 != $wgNumberOfArticles ) return;
 388
 389         $sql = "SELECT ss_total_views, ss_total_edits, ss_good_articles " .
 390           "FROM site_stats WHERE ss_row_id=1";
 391         $res = wfQuery( $sql, DB_READ, "wfLoadSiteStats" );
 392
 393         if ( 0 == wfNumRows( $res ) ) { return; }
 394         else {
 395                 $s = wfFetchObject( $res );
 396                 $wgTotalViews = $s->ss_total_views;
 397                 $wgTotalEdits = $s->ss_total_edits;
 398                 $wgNumberOfArticles = $s->ss_good_articles;
 399         }
 400 }
 401
 402 function wfEscapeHTML( $in )
 403 {
 404         return str_replace(
 405                 array( "&", "\"", ">", "<" ),
 406                 array( "&amp;", "&quot;", "&gt;", "&lt;" ),
 407                 $in );
 408 }
 409
 410 function wfEscapeHTMLTagsOnly( $in ) {
 411         return str_replace(
 412                 array( "\"", ">", "<" ),
 413                 array( "&quot;", "&gt;", "&lt;" ),
 414                 $in );
 415 }
 416
 417 function wfUnescapeHTML( $in )
 418 {
 419         $in = str_replace( "&lt;", "<", $in );
 420         $in = str_replace( "&gt;", ">", $in );
 421         $in = str_replace( "&quot;", "\"", $in );
 422         $in = str_replace( "&amp;", "&", $in );
 423         return $in;
 424 }
 425
 426 function wfImageDir( $fname )
 427 {
 428         global $wgUploadDirectory;
 429
 430         $hash = md5( $fname );
 431         $oldumask = umask(0);
 432         $dest = $wgUploadDirectory . "/" . $hash{0};
 433         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
 434         $dest .= "/" . substr( $hash, 0, 2 );
 435         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
 436
 437         umask( $oldumask );
 438         return $dest;
 439 }
 440
 441 function wfImageArchiveDir( $fname )
 442 {
 443         global $wgUploadDirectory;
 444
 445         $hash = md5( $fname );
 446         $oldumask = umask(0);
 447         $archive = "{$wgUploadDirectory}/archive";
 448         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 449         $archive .= "/" . $hash{0};
 450         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 451         $archive .= "/" . substr( $hash, 0, 2 );
 452         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 453
 454         umask( $oldumask );
 455         return $archive;
 456 }
 457
 458 function wfRecordUpload( $name, $oldver, $size, $desc )
 459 {
 460         global $wgUser, $wgLang, $wgTitle, $wgOut, $wgDeferredUpdateList;
 461         global $wgUseCopyrightUpload , $wpUploadCopyStatus , $wpUploadSource ;
 462
 463         $fname = "wfRecordUpload";
 464
 465         $sql = "SELECT img_name,img_size,img_timestamp,img_description,img_user," .
 466           "img_user_text FROM image WHERE img_name='" . wfStrencode( $name ) . "'";
 467         $res = wfQuery( $sql, DB_READ, $fname );
 468
 469         $now = wfTimestampNow();
 470         $won = wfInvertTimestamp( $now );
 471         $size = IntVal( $size );
 472
 473         if ( $wgUseCopyrightUpload )
 474           {
 475             $textdesc = "== " . wfMsg ( "filedesc" ) . " ==\n" . $desc . "\n" .
 476               "== " . wfMsg ( "filestatus" ) . " ==\n" . $wpUploadCopyStatus . "\n" .
 477               "== " . wfMsg ( "filesource" ) . " ==\n" . $wpUploadSource ;
 478           }
 479         else $textdesc = $desc ;
 480
 481         $now = wfTimestampNow();
 482         $won = wfInvertTimestamp( $now );
 483
 484         if ( 0 == wfNumRows( $res ) ) {
 485                 $sql = "INSERT INTO image (img_name,img_size,img_timestamp," .
 486                   "img_description,img_user,img_user_text) VALUES ('" .
 487                   wfStrencode( $name ) . "',$size,'{$now}','" .
 488                   wfStrencode( $desc ) . "', '" . $wgUser->getID() .
 489                   "', '" . wfStrencode( $wgUser->getName() ) . "')";
 490                 wfQuery( $sql, DB_WRITE, $fname );
 491
 492                 $sql = "SELECT cur_id,cur_text FROM cur WHERE cur_namespace=" .
 493                   Namespace::getImage() . " AND cur_title='" .
 494                   wfStrencode( $name ) . "'";
 495                 $res = wfQuery( $sql, DB_READ, $fname );
 496                 if ( 0 == wfNumRows( $res ) ) {
 497             $common =
 498                           Namespace::getImage() . ",'" .
 499                           wfStrencode( $name ) . "','" .
 500                           wfStrencode( $desc ) . "','" . $wgUser->getID() . "','" .
 501                           wfStrencode( $wgUser->getName() ) . "','" . $now .
 502                           "',1";
 503                         $sql = "INSERT INTO cur (cur_namespace,cur_title," .
 504                           "cur_comment,cur_user,cur_user_text,cur_timestamp,cur_is_new," .
 505                           "cur_text,inverse_timestamp,cur_touched) VALUES (" .
 506                           $common .
 507                           ",'" . wfStrencode( $textdesc ) . "','{$won}','{$now}')";
 508                         wfQuery( $sql, DB_WRITE, $fname );
 509                         $id = wfInsertId() or 0; # We should throw an error instead
 510                         $sql = "INSERT INTO recentchanges (rc_namespace,rc_title,
 511                                 rc_comment,rc_user,rc_user_text,rc_timestamp,rc_new,
 512                                 rc_cur_id,rc_cur_time) VALUES ({$common},{$id},'{$now}')";
 513             wfQuery( $sql, DB_WRITE, $fname );
 514                         $u = new SearchUpdate( $id, $name, $desc );
 515                         $u->doUpdate();
 516                 }
 517         } else {
 518                 $s = wfFetchObject( $res );
 519
 520                 $sql = "INSERT INTO oldimage (oi_name,oi_archive_name,oi_size," .
 521                   "oi_timestamp,oi_description,oi_user,oi_user_text) VALUES ('" .
 522                   wfStrencode( $s->img_name ) . "','" .
 523                   wfStrencode( $oldver ) .
 524                   "',{$s->img_size},'{$s->img_timestamp}','" .
 525                   wfStrencode( $s->img_description ) . "','" .
 526                   wfStrencode( $s->img_user ) . "','" .
 527                   wfStrencode( $s->img_user_text) . "')";
 528                 wfQuery( $sql, DB_WRITE, $fname );
 529
 530                 $sql = "UPDATE image SET img_size={$size}," .
 531                   "img_timestamp='" . wfTimestampNow() . "',img_user='" .
 532                   $wgUser->getID() . "',img_user_text='" .
 533                   wfStrencode( $wgUser->getName() ) . "', img_description='" .
 534                   wfStrencode( $desc ) . "' WHERE img_name='" .
 535                   wfStrencode( $name ) . "'";
 536                 wfQuery( $sql, DB_WRITE, $fname );
 537
 538                 $sql = "UPDATE cur SET cur_touched='{$now}' WHERE cur_namespace=" .
 539                   Namespace::getImage() . " AND cur_title='" .
 540                   wfStrencode( $name ) . "'";
 541                 wfQuery( $sql, DB_WRITE, $fname );
 542         }
 543
 544         $log = new LogPage( wfMsg( "uploadlogpage" ), wfMsg( "uploadlogpagetext" ) );
 545         $da = wfMsg( "uploadedimage", "[[:" . $wgLang->getNsText(
 546           Namespace::getImage() ) . ":{$name}|{$name}]]" );
 547         $ta = wfMsg( "uploadedimage", $name );
 548         $log->addEntry( $da, $desc, $ta );
 549 }
 550
 551
 552 /* Some generic result counters, pulled out of SearchEngine */
 553
 554 function wfShowingResults( $offset, $limit )
 555 {
 556         return wfMsg( "showingresults", $limit, $offset+1 );
 557 }
 558
 559 function wfShowingResultsNum( $offset, $limit, $num )
 560 {
 561         return wfMsg( "showingresultsnum", $limit, $offset+1, $num );
 562 }
 563
 564 function wfViewPrevNext( $offset, $limit, $link, $query = "" )
 565 {
 566         global $wgUser;
 567         $prev = wfMsg( "prevn", $limit );
 568         $next = wfMsg( "nextn", $limit );
 569
 570         $sk = $wgUser->getSkin();
 571         if ( 0 != $offset ) {
 572                 $po = $offset - $limit;
 573                 if ( $po < 0 ) { $po = 0; }
 574                 $q = "limit={$limit}&offset={$po}";
 575                 if ( "" != $query ) { $q .= "&{$query}"; }
 576                 $plink = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$prev}</a>";
 577         } else { $plink = $prev; }
 578
 579         $no = $offset + $limit;
 580         $q = "limit={$limit}&offset={$no}";
 581         if ( "" != $query ) { $q .= "&{$query}"; }
 582
 583         $nlink = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$next}</a>";
 584         $nums = wfNumLink( $offset, 20, $link , $query ) . " | " .
 585           wfNumLink( $offset, 50, $link, $query ) . " | " .
 586           wfNumLink( $offset, 100, $link, $query ) . " | " .
 587           wfNumLink( $offset, 250, $link, $query ) . " | " .
 588           wfNumLink( $offset, 500, $link, $query );
 589
 590         return wfMsg( "viewprevnext", $plink, $nlink, $nums );
 591 }
 592
 593 function wfNumLink( $offset, $limit, $link, $query = "" )
 594 {
 595         global $wgUser;
 596         if ( "" == $query ) { $q = ""; }
 597         else { $q = "{$query}&"; }
 598         $q .= "limit={$limit}&offset={$offset}";
 599
 600         $s = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$limit}</a>";
 601         return $s;
 602 }
 603
 604 function wfClientAcceptsGzip() {
 605         global $wgUseGzip;
 606         if( $wgUseGzip ) {
 607                 # FIXME: we may want to blacklist some broken browsers
 608                 if( preg_match(
 609                         '/\bgzip(?:;(q)=([0-9]+(?:\.[0-9]+)))?\b/',
 610                         $_SERVER["HTTP_ACCEPT_ENCODING"],
 611                         $m ) ) {
 612                         if( ( $m[1] == "q" ) && ( $m[2] == 0 ) ) return false;
 613                         wfDebug( " accepts gzip\n" );
 614                         return true;
 615                 }
 616         }
 617         return false;
 618 }
 619
 620 # Yay, more global functions!
 621 function wfCheckLimits( $deflimit = 50, $optionname = "rclimit" ) {
 622         global $wgUser;
 623
 624         $limit = (int)$_REQUEST['limit'];
 625         if( $limit < 0 ) $limit = 0;
 626         if( ( $limit == 0 ) && ( $optionname != "" ) ) {
 627                 $limit = (int)$wgUser->getOption( $optionname );
 628         }
 629         if( $limit <= 0 ) $limit = $deflimit;
 630         if( $limit > 5000 ) $limit = 5000; # We have *some* limits...
 631
 632         $offset = (int)$_REQUEST['offset'];
 633         $offset = (int)$offset;
 634         if( $offset < 0 ) $offset = 0;
 635         if( $offset > 65000 ) $offset = 65000; # do we need a max? what?
 636
 637         return array( $limit, $offset );
 638 }
 639
 640 # Escapes the given text so that it may be output using addWikiText()
 641 # without any linking, formatting, etc. making its way through. This
 642 # is achieved by substituting certain characters with HTML entities.
 643 # As required by the callers, <nowiki> is not used. It currently does
 644 # not filter out characters which have special meaning only at the
 645 # start of a line, such as "*".
 646 function wfEscapeWikiText( $text )
 647 {
 648         $text = str_replace(
 649                 array( '[',     "'",     'ISBN '    , '://'     , "\n=" ),
 650                 array( '&#91;', '&#39;', 'ISBN&#32;', '&#58;//' , "\n&#61;" ),
 651                 htmlspecialchars($text) );
 652         return $text;
 653 }
 654
 655 # Loads the entire MediaWiki namespace, returns the array
 656 function wfLoadAllMessages()
 657 {
 658         $sql = "SELECT cur_title,cur_text FROM cur WHERE cur_namespace=" . NS_MEDIAWIKI;
 659         $res = wfQuery( $sql, DB_READ, $fname );
 660
 661         $messages = array();
 662         for ( $row = wfFetchObject( $res ); $row; $row = wfFetchObject( $res ) ) {
 663                 $messages[$row->cur_title] = $row->cur_text;
 664         }
 665         wfFreeResult( $res );
 666         return $messages;
 667 }
 668
 669 function wfQuotedPrintable( $string, $charset = "" )
 670 {
 671         # Probably incomplete; see RFC 2045
 672         if( empty( $charset ) ) {
 673                 global $wgInputEncoding;
 674                 $charset = $wgInputEncoding;
 675         }
 676         $charset = strtoupper( $charset );
 677         $charset = str_replace( "ISO-8859", "ISO8859", $charset ); // ?
 678
 679         $illegal = '\x00-\x08\x0b\x0c\x0e-\x1f\x7f-\xff=';
 680         $replace = $illegal . '\t ?_';
 681         if( !preg_match( "/[$illegal]/", $string ) ) return $string;
 682         $out = "=?$charset?Q?";
 683         $out .= preg_replace( "/([$replace])/e", 'sprintf("=%02X",ord("$1"))', $string );
 684         $out .= "?=";
 685         return $out;
 686 }
 687
 688
 689 ?>