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