includes/GlobalFunctions.php

   1 <?php
   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 # Generates a URL from a URL-encoded title and a query string
  53 # Title::getLocalURL() is preferred in most cases
  54 #
  55 function wfLocalUrl( $a, $q = "" )
  56 {
  57         global $wgServer, $wgScript, $wgArticlePath;
  58
  59         $a = str_replace( " ", "_", $a );
  60
  61         if ( "" == $a ) {
  62                 if( "" == $q ) {
  63                         $a = $wgScript;
  64                 } else {
  65                         $a = "{$wgScript}?{$q}";
  66                 }
  67         } else if ( "" == $q ) {
  68                 $a = str_replace( "$1", $a, $wgArticlePath );
  69         } else if ($wgScript != '' ) {
  70                 $a = "{$wgScript}?title={$a}&{$q}";
  71         } else { //XXX ugly hack for toplevel wikis
  72                 $a = "/{$a}&{$q}";
  73         }
  74         return $a;
  75 }
  76
  77 function wfLocalUrlE( $a, $q = "" )
  78 {
  79         return wfEscapeHTML( wfLocalUrl( $a, $q ) );
  80         # die( "Call to obsolete function wfLocalUrlE()" );
  81 }
  82
  83 function wfFullUrl( $a, $q = "" ) {
  84         die( "Call to obsolete function wfFullUrl()" );
  85 }
  86
  87 function wfFullUrlE( $a, $q = "" ) {
  88         die( "Call to obsolete function wfFullUrlE()" );
  89
  90 }
  91
  92 function wfImageUrl( $img )
  93 {
  94         global $wgUploadPath;
  95
  96         $nt = Title::newFromText( $img );
  97         if( !$nt ) return "";
  98
  99         $name = $nt->getDBkey();
 100         $hash = md5( $name );
 101
 102         $url = "{$wgUploadPath}/" . $hash{0} . "/" .
 103           substr( $hash, 0, 2 ) . "/{$name}";
 104         return wfUrlencode( $url );
 105 }
 106
 107 function wfImagePath( $img )
 108 {
 109         global $wgUploadDirectory;
 110
 111         $nt = Title::newFromText( $img );
 112         if( !$nt ) return "";
 113
 114         $name = $nt->getDBkey();
 115         $hash = md5( $name );
 116
 117         $path = "{$wgUploadDirectory}/" . $hash{0} . "/" .
 118           substr( $hash, 0, 2 ) . "/{$name}";
 119         return $path;
 120 }
 121
 122 function wfThumbUrl( $img )
 123 {
 124         global $wgUploadPath;
 125
 126         $nt = Title::newFromText( $img );
 127         if( !$nt ) return "";
 128
 129         $name = $nt->getDBkey();
 130         $hash = md5( $name );
 131
 132         $url = "{$wgUploadPath}/thumb/" . $hash{0} . "/" .
 133           substr( $hash, 0, 2 ) . "/{$name}";
 134         return wfUrlencode( $url );
 135 }
 136
 137
 138 function wfImageThumbUrl( $name, $subdir="thumb" )
 139 {
 140         global $wgUploadPath;
 141
 142         $hash = md5( $name );
 143         $url = "{$wgUploadPath}/{$subdir}/" . $hash{0} . "/" .
 144           substr( $hash, 0, 2 ) . "/{$name}";
 145         return wfUrlencode($url);
 146 }
 147
 148 function wfImageArchiveUrl( $name )
 149 {
 150         global $wgUploadPath;
 151
 152         $hash = md5( substr( $name, 15) );
 153         $url = "{$wgUploadPath}/archive/" . $hash{0} . "/" .
 154           substr( $hash, 0, 2 ) . "/{$name}";
 155         return wfUrlencode($url);
 156 }
 157
 158 function wfUrlencode ( $s )
 159 {
 160         $s = urlencode( $s );
 161         $s = preg_replace( "/%3[Aa]/", ":", $s );
 162         $s = preg_replace( "/%2[Ff]/", "/", $s );
 163
 164         return $s;
 165 }
 166
 167 function wfUtf8Sequence($codepoint) {
 168         if($codepoint <     0x80) return chr($codepoint);
 169         if($codepoint <    0x800) return chr($codepoint >>  6 & 0x3f | 0xc0) .
 170                                      chr($codepoint       & 0x3f | 0x80);
 171     if($codepoint <  0x10000) return chr($codepoint >> 12 & 0x0f | 0xe0) .
 172                                      chr($codepoint >>  6 & 0x3f | 0x80) .
 173                                      chr($codepoint       & 0x3f | 0x80);
 174         if($codepoint < 0x100000) return chr($codepoint >> 18 & 0x07 | 0xf0) . # Double-check this
 175                                          chr($codepoint >> 12 & 0x3f | 0x80) .
 176                                      chr($codepoint >>  6 & 0x3f | 0x80) .
 177                                      chr($codepoint       & 0x3f | 0x80);
 178         # Doesn't yet handle outside the BMP
 179         return "&#$codepoint;";
 180 }
 181
 182 function wfMungeToUtf8($string) {
 183         global $wgInputEncoding; # This is debatable
 184         #$string = iconv($wgInputEncoding, "UTF-8", $string);
 185         $string = preg_replace ( '/&#([0-9]+);/e', 'wfUtf8Sequence($1)', $string );
 186         $string = preg_replace ( '/&#x([0-9a-f]+);/ie', 'wfUtf8Sequence(0x$1)', $string );
 187         # Should also do named entities here
 188         return $string;
 189 }
 190
 191 function wfDebug( $text, $logonly = false )
 192 {
 193         global $wgOut, $wgDebugLogFile, $wgDebugComments, $wgProfileOnly;
 194
 195         if ( isset( $wgOut ) && $wgDebugComments && !$logonly ) {
 196                 $wgOut->debug( $text );
 197         }
 198         if ( "" != $wgDebugLogFile && !$wgProfileOnly ) {
 199                 error_log( $text, 3, $wgDebugLogFile );
 200         }
 201 }
 202
 203 function logProfilingData()
 204 {
 205         global $wgRequestTime, $wgDebugLogFile;
 206         global $wgProfiling, $wgProfileStack, $wgProfileLimit, $wgUser;
 207         $now = wfTime();
 208
 209         list( $usec, $sec ) = explode( " ", $wgRequestTime );
 210         $start = (float)$sec + (float)$usec;
 211         $elapsed = $now - $start;
 212         if ( "" != $wgDebugLogFile ) {
 213                 $prof = wfGetProfilingOutput( $start, $elapsed );
 214                 $forward = "";
 215                 if( !empty( $_SERVER['HTTP_X_FORWARDED_FOR'] ) )
 216                         $forward = " forwarded for " . $_SERVER['HTTP_X_FORWARDED_FOR'];
 217                 if( !empty( $_SERVER['HTTP_CLIENT_IP'] ) )
 218                         $forward .= " client IP " . $_SERVER['HTTP_CLIENT_IP'];
 219                 if( !empty( $_SERVER['HTTP_FROM'] ) )
 220                         $forward .= " from " . $_SERVER['HTTP_FROM'];
 221                 if( $forward )
 222                         $forward = "\t(proxied via {$_SERVER['REMOTE_ADDR']}{$forward})";
 223                 if($wgUser->getId() == 0)
 224                         $forward .= " anon";
 225                 $log = sprintf( "%s\t%04.3f\t%s\n",
 226                   gmdate( "YmdHis" ), $elapsed,
 227                   urldecode( $_SERVER['REQUEST_URI'] . $forward ) );
 228                 error_log( $log . $prof, 3, $wgDebugLogFile );
 229         }
 230 }
 231
 232
 233 function wfReadOnly()
 234 {
 235         global $wgReadOnlyFile;
 236
 237         if ( "" == $wgReadOnlyFile ) { return false; }
 238         return is_file( $wgReadOnlyFile );
 239 }
 240
 241 $wgReplacementKeys = array( "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9" );
 242
 243 # Get a message from anywhere
 244 function wfMsg( $key ) {
 245         $args = func_get_args();
 246         if ( count( $args ) ) {
 247                 array_shift( $args );
 248         }
 249         return wfMsgReal( $key, $args, true );
 250 }
 251
 252 # Get a message from the language file
 253 function wfMsgNoDB( $key ) {
 254         $args = func_get_args();
 255         if ( count( $args ) ) {
 256                 array_shift( $args );
 257         }
 258         return wfMsgReal( $key, $args, false );
 259 }
 260
 261 # Really get a message
 262 function wfMsgReal( $key, $args, $useDB ) {
 263         global $wgReplacementKeys, $wgMessageCache, $wgLang;
 264
 265         $fname = "wfMsg";
 266         wfProfileIn( $fname );
 267         if ( $wgMessageCache ) {
 268                 $message = $wgMessageCache->get( $key, $useDB );
 269         } elseif ( $wgLang ) {
 270                 $message = $wgLang->getMessage( $key );
 271         } else {
 272                 wfDebug( "No language object when getting $key\n" );
 273                 $message = "&lt;$key&gt;";
 274         }
 275
 276         # Replace arguments
 277         if( count( $args ) ) {
 278                 $message = str_replace( $wgReplacementKeys, $args, $message );
 279         }
 280         wfProfileOut( $fname );
 281         return $message;
 282 }
 283
 284 function wfCleanFormFields( $fields )
 285 {
 286         global $HTTP_POST_VARS;
 287         global $wgInputEncoding, $wgOutputEncoding, $wgEditEncoding, $wgLang;
 288
 289         if ( get_magic_quotes_gpc() ) {
 290                 foreach ( $fields as $fname ) {
 291                         if ( isset( $HTTP_POST_VARS[$fname] ) ) {
 292                                 $HTTP_POST_VARS[$fname] = stripslashes(
 293                                   $HTTP_POST_VARS[$fname] );
 294                         }
 295                         global ${$fname};
 296                         if ( isset( ${$fname} ) ) {
 297                                 ${$fname} = stripslashes( ${$fname} );
 298                         }
 299                 }
 300         }
 301         $enc = $wgOutputEncoding;
 302         if( $wgEditEncoding != "") $enc = $wgEditEncoding;
 303         if ( $enc != $wgInputEncoding ) {
 304                 foreach ( $fields as $fname ) {
 305                         if ( isset( $HTTP_POST_VARS[$fname] ) ) {
 306                                 $HTTP_POST_VARS[$fname] = $wgLang->iconv(
 307                                   $wgOutputEncoding, $wgInputEncoding,
 308                                   $HTTP_POST_VARS[$fname] );
 309                         }
 310                         global ${$fname};
 311                         if ( isset( ${$fname} ) ) {
 312                                 ${$fname} = $wgLang->iconv(
 313                                   $enc, $wgInputEncoding, ${$fname} );
 314                         }
 315                 }
 316         }
 317 }
 318
 319 function wfMungeQuotes( $in )
 320 {
 321         $out = str_replace( "%", "%25", $in );
 322         $out = str_replace( "'", "%27", $out );
 323         $out = str_replace( "\"", "%22", $out );
 324         return $out;
 325 }
 326
 327 function wfDemungeQuotes( $in )
 328 {
 329         $out = str_replace( "%22", "\"", $in );
 330         $out = str_replace( "%27", "'", $out );
 331         $out = str_replace( "%25", "%", $out );
 332         return $out;
 333 }
 334
 335 function wfCleanQueryVar( $var )
 336 {
 337         global $wgLang;
 338         if ( get_magic_quotes_gpc() ) {
 339                 $var = stripslashes( $var );
 340         }
 341         return $wgLang->recodeInput( $var );
 342 }
 343
 344 function wfSpecialPage()
 345 {
 346         global $wgUser, $wgOut, $wgTitle, $wgLang;
 347
 348         /* FIXME: this list probably shouldn't be language-specific, per se */
 349         $validSP = $wgLang->getValidSpecialPages();
 350         $sysopSP = $wgLang->getSysopSpecialPages();
 351         $devSP = $wgLang->getDeveloperSpecialPages();
 352
 353         $wgOut->setArticleRelated( false );
 354         $wgOut->setRobotpolicy( "noindex,follow" );
 355
 356         $bits = split( "/", $wgTitle->getDBkey(), 2 );
 357         $t = $bits[0];
 358         if( empty( $bits[1] ) ) {
 359                 $par = NULL;
 360         } else {
 361                 $par = $bits[1];
 362         }
 363
 364         if ( array_key_exists( $t, $validSP ) ||
 365           ( $wgUser->isSysop() && array_key_exists( $t, $sysopSP ) ) ||
 366           ( $wgUser->isDeveloper() && array_key_exists( $t, $devSP ) ) ) {
 367                 if($par !== NULL)
 368                         $wgTitle = Title::makeTitle( Namespace::getSpecial(), $t );
 369
 370                 $wgOut->setPageTitle( wfMsg( strtolower( $wgTitle->getText() ) ) );
 371
 372                 $inc = "Special" . $t . ".php";
 373                 include_once( $inc );
 374                 $call = "wfSpecial" . $t;
 375                 $call( $par );
 376         } else if ( array_key_exists( $t, $sysopSP ) ) {
 377                 $wgOut->sysopRequired();
 378         } else if ( array_key_exists( $t, $devSP ) ) {
 379                 $wgOut->developerRequired();
 380         } else {
 381                 $wgOut->errorpage( "nosuchspecialpage", "nospecialpagetext" );
 382         }
 383 }
 384
 385 function wfSearch( $s )
 386 {
 387         $se = new SearchEngine( wfCleanQueryVar( $s ) );
 388         $se->showResults();
 389 }
 390
 391 function wfGo( $s )
 392 { # pick the nearest match
 393         $se = new SearchEngine( wfCleanQueryVar( $s ) );
 394         $se->goResult();
 395 }
 396
 397 # Just like exit() but makes a note of it.
 398 function wfAbruptExit(){
 399         static $called = false;
 400         if ( $called ){
 401                 exit();
 402         }
 403         $called = true;
 404
 405         if( function_exists( "debug_backtrace" ) ){ // PHP >= 4.3
 406                 $bt = debug_backtrace();
 407                 for($i = 0; $i < count($bt) ; $i++){
 408                         $file = $bt[$i]["file"];
 409                         $line = $bt[$i]["line"];
 410                         wfDebug("WARNING: Abrupt exit in $file at line $line\n");
 411                 }
 412         } else {
 413                 wfDebug("WARNING: Abrupt exit\n");
 414         }
 415         exit();
 416 }
 417
 418 function wfDebugDieBacktrace( $msg = "" ) {
 419         $msg .= "\n<p>Backtrace:</p>\n<ul>\n";
 420         $backtrace = debug_backtrace();
 421         foreach( $backtrace as $call ) {
 422                 $f = split( DIRECTORY_SEPARATOR, $call['file'] );
 423                 $file = $f[count($f)-1];
 424                 $msg .= "<li>" . $file . " line " . $call['line'] . ", in ";
 425                 if( !empty( $call['class'] ) ) $msg .= $call['class'] . "::";
 426                 $msg .= $call['function'] . "()</li>\n";
 427         }
 428         die( $msg );
 429 }
 430
 431 function wfNumberOfArticles()
 432 {
 433         global $wgNumberOfArticles;
 434
 435         wfLoadSiteStats();
 436         return $wgNumberOfArticles;
 437 }
 438
 439 /* private */ function wfLoadSiteStats()
 440 {
 441         global $wgNumberOfArticles, $wgTotalViews, $wgTotalEdits;
 442         if ( -1 != $wgNumberOfArticles ) return;
 443
 444         $sql = "SELECT ss_total_views, ss_total_edits, ss_good_articles " .
 445           "FROM site_stats WHERE ss_row_id=1";
 446         $res = wfQuery( $sql, DB_READ, "wfLoadSiteStats" );
 447
 448         if ( 0 == wfNumRows( $res ) ) { return; }
 449         else {
 450                 $s = wfFetchObject( $res );
 451                 $wgTotalViews = $s->ss_total_views;
 452                 $wgTotalEdits = $s->ss_total_edits;
 453                 $wgNumberOfArticles = $s->ss_good_articles;
 454         }
 455 }
 456
 457 function wfEscapeHTML( $in )
 458 {
 459         return str_replace(
 460                 array( "&", "\"", ">", "<" ),
 461                 array( "&amp;", "&quot;", "&gt;", "&lt;" ),
 462                 $in );
 463 }
 464
 465 function wfEscapeHTMLTagsOnly( $in ) {
 466         return str_replace(
 467                 array( "\"", ">", "<" ),
 468                 array( "&quot;", "&gt;", "&lt;" ),
 469                 $in );
 470 }
 471
 472 function wfUnescapeHTML( $in )
 473 {
 474         $in = str_replace( "&lt;", "<", $in );
 475         $in = str_replace( "&gt;", ">", $in );
 476         $in = str_replace( "&quot;", "\"", $in );
 477         $in = str_replace( "&amp;", "&", $in );
 478         return $in;
 479 }
 480
 481 function wfImageDir( $fname )
 482 {
 483         global $wgUploadDirectory;
 484
 485         $hash = md5( $fname );
 486         $oldumask = umask(0);
 487         $dest = $wgUploadDirectory . "/" . $hash{0};
 488         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
 489         $dest .= "/" . substr( $hash, 0, 2 );
 490         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
 491
 492         umask( $oldumask );
 493         return $dest;
 494 }
 495
 496 function wfImageThumbDir( $fname , $subdir="thumb")
 497 {
 498         return wfImageArchiveDir( $fname, $subdir );
 499 }
 500
 501 function wfImageArchiveDir( $fname , $subdir="archive")
 502 {
 503         global $wgUploadDirectory;
 504
 505         $hash = md5( $fname );
 506         $oldumask = umask(0);
 507         $archive = "{$wgUploadDirectory}/{$subdir}";
 508         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 509         $archive .= "/" . $hash{0};
 510         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 511         $archive .= "/" . substr( $hash, 0, 2 );
 512         if ( ! is_dir( $archive ) ) { mkdir( $archive, 0777 ); }
 513
 514         umask( $oldumask );
 515         return $archive;
 516 }
 517
 518 function wfRecordUpload( $name, $oldver, $size, $desc )
 519 {
 520         global $wgUser, $wgLang, $wgTitle, $wgOut, $wgDeferredUpdateList;
 521         global $wgUseCopyrightUpload , $wpUploadCopyStatus , $wpUploadSource ;
 522
 523         $fname = "wfRecordUpload";
 524
 525         $sql = "SELECT img_name,img_size,img_timestamp,img_description,img_user," .
 526           "img_user_text FROM image WHERE img_name='" . wfStrencode( $name ) . "'";
 527         $res = wfQuery( $sql, DB_READ, $fname );
 528
 529         $now = wfTimestampNow();
 530         $won = wfInvertTimestamp( $now );
 531         $size = IntVal( $size );
 532
 533         if ( $wgUseCopyrightUpload )
 534           {
 535             $textdesc = "== " . wfMsg ( "filedesc" ) . " ==\n" . $desc . "\n" .
 536               "== " . wfMsg ( "filestatus" ) . " ==\n" . $wpUploadCopyStatus . "\n" .
 537               "== " . wfMsg ( "filesource" ) . " ==\n" . $wpUploadSource ;
 538           }
 539         else $textdesc = $desc ;
 540
 541         $now = wfTimestampNow();
 542         $won = wfInvertTimestamp( $now );
 543
 544         if ( 0 == wfNumRows( $res ) ) {
 545                 $sql = "INSERT INTO image (img_name,img_size,img_timestamp," .
 546                   "img_description,img_user,img_user_text) VALUES ('" .
 547                   wfStrencode( $name ) . "',$size,'{$now}','" .
 548                   wfStrencode( $desc ) . "', '" . $wgUser->getID() .
 549                   "', '" . wfStrencode( $wgUser->getName() ) . "')";
 550                 wfQuery( $sql, DB_WRITE, $fname );
 551
 552                 $sql = "SELECT cur_id,cur_text FROM cur WHERE cur_namespace=" .
 553                   Namespace::getImage() . " AND cur_title='" .
 554                   wfStrencode( $name ) . "'";
 555                 $res = wfQuery( $sql, DB_READ, $fname );
 556                 if ( 0 == wfNumRows( $res ) ) {
 557             $common =
 558                           Namespace::getImage() . ",'" .
 559                           wfStrencode( $name ) . "','" .
 560                           wfStrencode( $desc ) . "','" . $wgUser->getID() . "','" .
 561                           wfStrencode( $wgUser->getName() ) . "','" . $now .
 562                           "',1";
 563                         $sql = "INSERT INTO cur (cur_namespace,cur_title," .
 564                           "cur_comment,cur_user,cur_user_text,cur_timestamp,cur_is_new," .
 565                           "cur_text,inverse_timestamp,cur_touched) VALUES (" .
 566                           $common .
 567                           ",'" . wfStrencode( $textdesc ) . "','{$won}','{$now}')";
 568                         wfQuery( $sql, DB_WRITE, $fname );
 569                         $id = wfInsertId() or 0; # We should throw an error instead
 570
 571                         $titleObj = Title::makeTitle( NS_IMAGE, $name );
 572                         RecentChange::notifyNew( $now, $titleObj, 0, $wgUser, $desc );
 573
 574                         $u = new SearchUpdate( $id, $name, $desc );
 575                         $u->doUpdate();
 576                 }
 577         } else {
 578                 $s = wfFetchObject( $res );
 579
 580                 $sql = "INSERT INTO oldimage (oi_name,oi_archive_name,oi_size," .
 581                   "oi_timestamp,oi_description,oi_user,oi_user_text) VALUES ('" .
 582                   wfStrencode( $s->img_name ) . "','" .
 583                   wfStrencode( $oldver ) .
 584                   "',{$s->img_size},'{$s->img_timestamp}','" .
 585                   wfStrencode( $s->img_description ) . "','" .
 586                   wfStrencode( $s->img_user ) . "','" .
 587                   wfStrencode( $s->img_user_text) . "')";
 588                 wfQuery( $sql, DB_WRITE, $fname );
 589
 590                 $sql = "UPDATE image SET img_size={$size}," .
 591                   "img_timestamp='" . wfTimestampNow() . "',img_user='" .
 592                   $wgUser->getID() . "',img_user_text='" .
 593                   wfStrencode( $wgUser->getName() ) . "', img_description='" .
 594                   wfStrencode( $desc ) . "' WHERE img_name='" .
 595                   wfStrencode( $name ) . "'";
 596                 wfQuery( $sql, DB_WRITE, $fname );
 597
 598                 $sql = "UPDATE cur SET cur_touched='{$now}' WHERE cur_namespace=" .
 599                   Namespace::getImage() . " AND cur_title='" .
 600                   wfStrencode( $name ) . "'";
 601                 wfQuery( $sql, DB_WRITE, $fname );
 602         }
 603
 604         $log = new LogPage( wfMsg( "uploadlogpage" ), wfMsg( "uploadlogpagetext" ) );
 605         $da = wfMsg( "uploadedimage", "[[:" . $wgLang->getNsText(
 606           Namespace::getImage() ) . ":{$name}|{$name}]]" );
 607         $ta = wfMsg( "uploadedimage", $name );
 608         $log->addEntry( $da, $desc, $ta );
 609 }
 610
 611
 612 /* Some generic result counters, pulled out of SearchEngine */
 613
 614 function wfShowingResults( $offset, $limit )
 615 {
 616         global $wgLang;
 617         return wfMsg( "showingresults", $wgLang->formatNum( $limit ), $wgLang->formatNum( $offset+1 ) );
 618 }
 619
 620 function wfShowingResultsNum( $offset, $limit, $num )
 621 {
 622         global $wgLang;
 623         return wfMsg( "showingresultsnum", $wgLang->formatNum( $limit ), $wgLang->formatNum( $offset+1 ), $wgLang->formatNum( $num ) );
 624 }
 625
 626 function wfViewPrevNext( $offset, $limit, $link, $query = "", $atend = false )
 627 {
 628         global $wgUser, $wgLang;
 629         $fmtLimit = $wgLang->formatNum( $limit );
 630         $prev = wfMsg( "prevn", $fmtLimit );
 631         $next = wfMsg( "nextn", $fmtLimit );
 632         $link = wfUrlencode( $link );
 633
 634         $sk = $wgUser->getSkin();
 635         if ( 0 != $offset ) {
 636                 $po = $offset - $limit;
 637                 if ( $po < 0 ) { $po = 0; }
 638                 $q = "limit={$limit}&offset={$po}";
 639                 if ( "" != $query ) { $q .= "&{$query}"; }
 640                 $plink = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$prev}</a>";
 641         } else { $plink = $prev; }
 642
 643         $no = $offset + $limit;
 644         $q = "limit={$limit}&offset={$no}";
 645         if ( "" != $query ) { $q .= "&{$query}"; }
 646
 647         if ( $atend ) {
 648                 $nlink = $next;
 649         } else {
 650                 $nlink = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$next}</a>";
 651         }
 652         $nums = wfNumLink( $offset, 20, $link , $query ) . " | " .
 653           wfNumLink( $offset, 50, $link, $query ) . " | " .
 654           wfNumLink( $offset, 100, $link, $query ) . " | " .
 655           wfNumLink( $offset, 250, $link, $query ) . " | " .
 656           wfNumLink( $offset, 500, $link, $query );
 657
 658         return wfMsg( "viewprevnext", $plink, $nlink, $nums );
 659 }
 660
 661 function wfNumLink( $offset, $limit, $link, $query = "" )
 662 {
 663         global $wgUser, $wgLang;
 664         if ( "" == $query ) { $q = ""; }
 665         else { $q = "{$query}&"; }
 666         $q .= "limit={$limit}&offset={$offset}";
 667
 668         $fmtLimit = $wgLang->formatNum( $limit );
 669         $s = "<a href=\"" . wfLocalUrlE( $link, $q ) . "\">{$fmtLimit}</a>";
 670         return $s;
 671 }
 672
 673 function wfClientAcceptsGzip() {
 674         global $wgUseGzip;
 675         if( $wgUseGzip ) {
 676                 # FIXME: we may want to blacklist some broken browsers
 677                 if( preg_match(
 678                         '/\bgzip(?:;(q)=([0-9]+(?:\.[0-9]+)))?\b/',
 679                         $_SERVER["HTTP_ACCEPT_ENCODING"],
 680                         $m ) ) {
 681                         if( ( $m[1] == "q" ) && ( $m[2] == 0 ) ) return false;
 682                         wfDebug( " accepts gzip\n" );
 683                         return true;
 684                 }
 685         }
 686         return false;
 687 }
 688
 689 # Yay, more global functions!
 690 function wfCheckLimits( $deflimit = 50, $optionname = "rclimit" ) {
 691         global $wgUser;
 692
 693         if( isset( $_REQUEST['limit'] ) ) {
 694                 $limit = IntVal( $_REQUEST['limit'] );
 695         } else {
 696                 $limit = 0;
 697         }
 698         if( $limit < 0 ) $limit = 0;
 699         if( ( $limit == 0 ) && ( $optionname != "" ) ) {
 700                 $limit = (int)$wgUser->getOption( $optionname );
 701         }
 702         if( $limit <= 0 ) $limit = $deflimit;
 703         if( $limit > 5000 ) $limit = 5000; # We have *some* limits...
 704
 705         if( isset( $_REQUEST['offset'] ) ) {
 706                 $offset = IntVal( $_REQUEST['offset'] );
 707         } else {
 708                 $offset = 0;
 709         }
 710         if( $offset < 0 ) $offset = 0;
 711         if( $offset > 65000 ) $offset = 65000; # do we need a max? what?
 712
 713         return array( $limit, $offset );
 714 }
 715
 716 # Escapes the given text so that it may be output using addWikiText()
 717 # without any linking, formatting, etc. making its way through. This
 718 # is achieved by substituting certain characters with HTML entities.
 719 # As required by the callers, <nowiki> is not used. It currently does
 720 # not filter out characters which have special meaning only at the
 721 # start of a line, such as "*".
 722 function wfEscapeWikiText( $text )
 723 {
 724         $text = str_replace(
 725                 array( '[',     '|',      "'",     'ISBN '    , '://'     , "\n=" ),
 726                 array( '&#91;', '&#124;', '&#39;', 'ISBN&#32;', '&#58;//' , "\n&#61;" ),
 727                 htmlspecialchars($text) );
 728         return $text;
 729 }
 730
 731 function wfQuotedPrintable( $string, $charset = "" )
 732 {
 733         # Probably incomplete; see RFC 2045
 734         if( empty( $charset ) ) {
 735                 global $wgInputEncoding;
 736                 $charset = $wgInputEncoding;
 737         }
 738         $charset = strtoupper( $charset );
 739         $charset = str_replace( "ISO-8859", "ISO8859", $charset ); // ?
 740
 741         $illegal = '\x00-\x08\x0b\x0c\x0e-\x1f\x7f-\xff=';
 742         $replace = $illegal . '\t ?_';
 743         if( !preg_match( "/[$illegal]/", $string ) ) return $string;
 744         $out = "=?$charset?Q?";
 745         $out .= preg_replace( "/([$replace])/e", 'sprintf("=%02X",ord("$1"))', $string );
 746         $out .= "?=";
 747         return $out;
 748 }
 749
 750 function wfTime(){
 751         $st = explode( " ", microtime() );
 752         return (float)$st[0] + (float)$st[1];
 753 }
 754
 755 # Changes the first character to an HTML entity
 756 function wfHtmlEscapeFirst( $text ) {
 757         $ord = ord($text);
 758         $newText = substr($text, 1);
 759         return "&#$ord;$newText";
 760 }
 761
 762 # Sets dest to source and returns the original value of dest
 763 function wfSetVar( &$dest, $source )
 764 {
 765         $temp = $dest;
 766         $dest = $source;
 767         return $temp;
 768 }
 769
 770 # Sets dest to a reference to source and returns the original dest
 771 function &wfSetRef( &$dest, &$source )
 772 {
 773         $temp =& $dest;
 774         $dest =& $source;
 775         return $temp;
 776 }
 777
 778 # This function takes two arrays as input, and returns a CGI-style string, e.g.
 779 # "days=7&limit=100". Options in the first array override options in the second.
 780 # Options set to "" will not be output.
 781 function wfArrayToCGI( $array1, $array2 = NULL )
 782 {
 783         if ( !is_null( $array2 ) ) {
 784                 $array1 = $array1 + $array2;
 785         }
 786
 787         $cgi = "";
 788         foreach ( $array1 as $key => $value ) {
 789                 if ( "" !== $value ) {
 790                         if ( "" != $cgi ) {
 791                                 $cgi .= "&";
 792                         }
 793                         $cgi .= "{$key}={$value}";
 794                 }
 795         }
 796         return $cgi;
 797 }
 798
 799 /* Purges a list of Squids defined in $wgSquidServers.
 800 $urlArr should contain the full URLs to purge as values
 801 (example: $urlArr[] = 'http://my.host/something')
 802 XXX report broken Squids per mail or log */
 803
 804 function wfPurgeSquidServers ($urlArr) {
 805     global  $wgSquidServers;
 806     $maxsocketspersquid = 8; //  socket cap per Squid
 807     $urlspersocket = 400; // 400 seems to be a good tradeoff, opening a socket takes a while
 808     $sockspersq =  ceil(count($urlArr) / $urlspersocket );
 809     if ($sockspersq == 1) {
 810         /* the most common case */
 811         $urlspersocket = count($urlArr);
 812     } else if ($sockspersq > $maxsocketspersquid ) {
 813         $urlspersocket = ceil(count($urlArr) / $maxsocketspersquid);
 814         $sockspersq = $maxsocketspersquid;
 815     }
 816     $totalsockets = count($wgSquidServers) * $sockspersq;
 817     $sockets = Array();
 818
 819     /* this sets up the sockets and tests the first socket for each server. */
 820     for ($ss=0;$ss < count($wgSquidServers);$ss++) {
 821         $failed = false;
 822         $so = 0;
 823         while ($so < $sockspersq && !$failed) {
 824             if ($so == 0) {
 825                 /* first socket for this server, do the tests */
 826                 list($server, $port) = explode(':', $wgSquidServers[$ss]);
 827                 if(!isset($port)) $port = 80;
 828                 $socket = @fsockopen($server, $port, $error, $errstr, 3);
 829                 if (!$socket) {
 830                     $failed = true;
 831                     $totalsockets -= $sockspersq;
 832                 } else {
 833                     @fputs($socket,"PURGE " . $urlArr[0] . " HTTP/1.0\r\n".
 834                     "Connection: Keep-Alive\r\n\r\n");
 835                     $res = @fread($socket,512);
 836                     /* Squid only returns http headers with 200 or 404 status,
 837                     if there's more returned something's wrong */
 838                     if (strlen($res) > 250) {
 839                         fclose($socket);
 840                         $failed = true;
 841                         $totalsockets -= $sockspersq;
 842                     } else {
 843                         @stream_set_blocking($socket,false);
 844                         $sockets[] = $socket;
 845                     }
 846                 }
 847             } else {
 848                 /* open the remaining sockets for this server */
 849                 list($server, $port) = explode(':', $wgSquidServers[$ss]);
 850                 if(!isset($port)) $port = 80;
 851                 $sockets[] = @fsockopen($server, $port, $error, $errstr, 2);
 852                 @stream_set_blocking($sockets[$s],false);
 853             }
 854             $so++;
 855         }
 856     }
 857
 858     if ($urlspersocket > 1) {
 859         /* now do the heavy lifting. The fread() relies on Squid returning only the headers */
 860         for ($r=0;$r < $urlspersocket;$r++) {
 861             for ($s=0;$s < $totalsockets;$s++) {
 862                 if($r != 0) {
 863                     $res = '';
 864                     $esc = 0;
 865                     while (strlen($res) < 100 && $esc < 20  ) {
 866                         $res .= @fread($sockets[$s],512);
 867                         $esc++;
 868                     }
 869                 }
 870                 $urindex = $r + $urlspersocket * ($s - $sockspersq * floor($s / $sockspersq));
 871                 @fputs($sockets[$s],"PURGE " . $urlArr[$urindex] . " HTTP/1.0\r\n".
 872                 "Connection: Keep-Alive\r\n\r\n");
 873             }
 874         }
 875     }
 876
 877     foreach ($sockets as $socket) {
 878         @fclose($sockets);
 879     }
 880     return;
 881 }
 882 ?>