includes/GlobalFunctions.php

   1 <?php
   2 # Global functions used everywhere
   3 # $Id$
   4
   5 $wgNumberOfArticles = -1; # Unset
   6 $wgTotalViews = -1;
   7 $wgTotalEdits = -1;
   8
   9 require_once( 'DatabaseFunctions.php' );
  10 require_once( 'UpdateClasses.php' );
  11 require_once( '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 if( !function_exists('is_a') ) {
  41         # Exists in PHP 4.2.0+
  42         function is_a( $object, $class_name ) {
  43                 return
  44                         (strcasecmp( get_class( $object ), $class_name ) == 0) ||
  45                          is_subclass_of( $object, $class_name );
  46         }
  47 }
  48
  49 # html_entity_decode exists in PHP 4.3.0+ but is FATALLY BROKEN even then,
  50 # with no UTF-8 support.
  51 function do_html_entity_decode( $string, $quote_style=ENT_COMPAT, $charset='ISO-8859-1' ) {
  52         static $trans;
  53         if( !isset( $trans ) ) {
  54                 $trans = array_flip( get_html_translation_table( HTML_ENTITIES, $quote_style ) );
  55                 # Assumes $charset will always be the same through a run, and only understands
  56                 # utf-8 or default. Note - mixing latin1 named entities and unicode numbered
  57                 # ones will result in a bad link.
  58                 if( strcasecmp( 'utf-8', $charset ) == 0 ) {
  59                         $trans = array_map( 'utf8_encode', $trans );
  60                 }
  61         }
  62         return strtr( $string, $trans );
  63 }
  64
  65 $wgRandomSeeded = false;
  66
  67 # Seed Mersenne Twister
  68 # Only necessary in PHP < 4.2.0
  69 function wfSeedRandom()
  70 {
  71         global $wgRandomSeeded;
  72
  73         if ( ! $wgRandomSeeded && version_compare( phpversion(), '4.2.0' ) < 0 ) {
  74                 $seed = hexdec(substr(md5(microtime()),-8)) & 0x7fffffff;
  75                 mt_srand( $seed );
  76                 $wgRandomSeeded = true;
  77         }
  78 }
  79
  80 # Generates a URL from a URL-encoded title and a query string
  81 # Title::getLocalURL() is preferred in most cases
  82 #
  83 function wfLocalUrl( $a, $q = '' )
  84 {
  85         global $wgServer, $wgScript, $wgArticlePath;
  86
  87         $a = str_replace( ' ', '_', $a );
  88
  89         if ( '' == $a ) {
  90                 if( '' == $q ) {
  91                         $a = $wgScript;
  92                 } else {
  93                         $a = "{$wgScript}?{$q}";
  94                 }
  95         } else if ( '' == $q ) {
  96                 $a = str_replace( "$1", $a, $wgArticlePath );
  97         } else if ($wgScript != '' ) {
  98                 $a = "{$wgScript}?title={$a}&{$q}";
  99         } else { //XXX hackish solution for toplevel wikis
 100                 $a = "/{$a}?{$q}";
 101         }
 102         return $a;
 103 }
 104
 105 function wfLocalUrlE( $a, $q = '' )
 106 {
 107         return wfEscapeHTML( wfLocalUrl( $a, $q ) );
 108         # die( "Call to obsolete function wfLocalUrlE()" );
 109 }
 110
 111 function wfFullUrl( $a, $q = '' ) {
 112         wfDebugDieBacktrace( 'Call to obsolete function wfFullUrl(); use Title::getFullURL' );
 113 }
 114
 115 function wfFullUrlE( $a, $q = '' ) {
 116         wfDebugDieBacktrace( 'Call to obsolete function wfFullUrlE(); use Title::getFullUrlE' );
 117
 118 }
 119
 120 // orphan function wfThumbUrl( $img )
 121 //{
 122 //      global $wgUploadPath;
 123 //
 124 //      $nt = Title::newFromText( $img );
 125 //      if( !$nt ) return "";
 126 //
 127 //      $name = $nt->getDBkey();
 128 //      $hash = md5( $name );
 129 //
 130 //      $url = "{$wgUploadPath}/thumb/" . $hash{0} . "/" .
 131 //        substr( $hash, 0, 2 ) . "/{$name}";
 132 //      return wfUrlencode( $url );
 133 //}
 134
 135
 136 function wfImageArchiveUrl( $name )
 137 {
 138         global $wgUploadPath;
 139
 140         $hash = md5( substr( $name, 15) );
 141         $url = "{$wgUploadPath}/archive/" . $hash{0} . "/" .
 142           substr( $hash, 0, 2 ) . "/{$name}";
 143         return wfUrlencode($url);
 144 }
 145
 146 function wfUrlencode ( $s )
 147 {
 148         $s = urlencode( $s );
 149         $s = preg_replace( '/%3[Aa]/', ':', $s );
 150         $s = preg_replace( '/%2[Ff]/', '/', $s );
 151
 152         return $s;
 153 }
 154
 155 function wfUtf8Sequence($codepoint) {
 156         if($codepoint <         0x80) return chr($codepoint);
 157         if($codepoint <    0x800) return chr($codepoint >>      6 & 0x3f | 0xc0) .
 158                                                                          chr($codepoint           & 0x3f | 0x80);
 159         if($codepoint <  0x10000) return chr($codepoint >> 12 & 0x0f | 0xe0) .
 160                                                                          chr($codepoint >>      6 & 0x3f | 0x80) .
 161                                                                          chr($codepoint           & 0x3f | 0x80);
 162         if($codepoint < 0x100000) return chr($codepoint >> 18 & 0x07 | 0xf0) . # Double-check this
 163                                                                          chr($codepoint >> 12 & 0x3f | 0x80) .
 164                                                                          chr($codepoint >>      6 & 0x3f | 0x80) .
 165                                                                          chr($codepoint           & 0x3f | 0x80);
 166         # Doesn't yet handle outside the BMP
 167         return "&#$codepoint;";
 168 }
 169
 170 # Converts numeric character entities to UTF-8
 171 function wfMungeToUtf8($string) {
 172         global $wgInputEncoding; # This is debatable
 173         #$string = iconv($wgInputEncoding, "UTF-8", $string);
 174         $string = preg_replace ( '/&#([0-9]+);/e', 'wfUtf8Sequence($1)', $string );
 175         $string = preg_replace ( '/&#x([0-9a-f]+);/ie', 'wfUtf8Sequence(0x$1)', $string );
 176         # Should also do named entities here
 177         return $string;
 178 }
 179
 180 # Converts a single UTF-8 character into the corresponding HTML character entity
 181 function wfUtf8Entity( $matches ) {
 182         $char = $matches[0];
 183         # Find the length
 184         $z = ord( $char{0} );
 185         if ( $z & 0x80 ) {
 186                 $length = 0;
 187                 while ( $z & 0x80 ) {
 188                         $length++;
 189                         $z <<= 1;
 190                 }
 191         } else {
 192                 $length = 1;
 193         }
 194
 195         if ( $length != strlen( $char ) ) {
 196                 return '';
 197         }
 198         if ( $length == 1 ) {
 199                 return $char;
 200         }
 201
 202         # Mask off the length-determining bits and shift back to the original location
 203         $z &= 0xff;
 204         $z >>= $length;
 205
 206         # Add in the free bits from subsequent bytes
 207         for ( $i=1; $i<$length; $i++ ) {
 208                 $z <<= 6;
 209                 $z |= ord( $char{$i} ) & 0x3f;
 210         }
 211
 212         # Make entity
 213         return "&#$z;";
 214 }
 215
 216 # Converts all multi-byte characters in a UTF-8 string into the appropriate character entity
 217 function wfUtf8ToHTML($string) {
 218         return preg_replace_callback( '/[\\xc0-\\xfd][\\x80-\\xbf]*/', 'wfUtf8Entity', $string );
 219 }
 220
 221 function wfDebug( $text, $logonly = false )
 222 {
 223         global $wgOut, $wgDebugLogFile, $wgDebugComments, $wgProfileOnly, $wgDebugRawPage;
 224
 225         # Check for raw action using $_GET not $wgRequest, since the latter might not be initialised yet
 226         if ( isset( $_GET['action'] ) && $_GET['action'] == 'raw' && !$wgDebugRawPage ) {
 227                 return;
 228         }
 229
 230         if ( isset( $wgOut ) && $wgDebugComments && !$logonly ) {
 231                 $wgOut->debug( $text );
 232         }
 233         if ( "" != $wgDebugLogFile && !$wgProfileOnly ) {
 234                 error_log( $text, 3, $wgDebugLogFile );
 235         }
 236 }
 237
 238 # Log for database errors
 239 function wfLogDBError( $text ) {
 240         global $wgDBerrorLog;
 241         if ( $wgDBerrorLog ) {
 242                 $text = date("D M j G:i:s T Y") . "\t$text";
 243                 error_log( $text, 3, $wgDBerrorLog );
 244         }
 245 }
 246
 247 function logProfilingData()
 248 {
 249         global $wgRequestTime, $wgDebugLogFile, $wgDebugRawPage, $wgRequest;
 250         global $wgProfiling, $wgProfileStack, $wgProfileLimit, $wgUser;
 251         $now = wfTime();
 252
 253         list( $usec, $sec ) = explode( " ", $wgRequestTime );
 254         $start = (float)$sec + (float)$usec;
 255         $elapsed = $now - $start;
 256         if ( $wgProfiling ) {
 257                 $prof = wfGetProfilingOutput( $start, $elapsed );
 258                 $forward = '';
 259                 if( !empty( $_SERVER['HTTP_X_FORWARDED_FOR'] ) )
 260                         $forward = ' forwarded for ' . $_SERVER['HTTP_X_FORWARDED_FOR'];
 261                 if( !empty( $_SERVER['HTTP_CLIENT_IP'] ) )
 262                         $forward .= ' client IP ' . $_SERVER['HTTP_CLIENT_IP'];
 263                 if( !empty( $_SERVER['HTTP_FROM'] ) )
 264                         $forward .= ' from ' . $_SERVER['HTTP_FROM'];
 265                 if( $forward )
 266                         $forward = "\t(proxied via {$_SERVER['REMOTE_ADDR']}{$forward})";
 267                 if($wgUser->getId() == 0)
 268                         $forward .= ' anon';
 269                 $log = sprintf( "%s\t%04.3f\t%s\n",
 270                   gmdate( 'YmdHis' ), $elapsed,
 271                   urldecode( $_SERVER['REQUEST_URI'] . $forward ) );
 272                 if ( '' != $wgDebugLogFile && ( $wgRequest->getVal('action') != 'raw' || $wgDebugRawPage ) ) {
 273                         error_log( $log . $prof, 3, $wgDebugLogFile );
 274                 }
 275         }
 276 }
 277
 278
 279 function wfReadOnly()
 280 {
 281         global $wgReadOnlyFile;
 282
 283         if ( "" == $wgReadOnlyFile ) { return false; }
 284         return is_file( $wgReadOnlyFile );
 285 }
 286
 287 $wgReplacementKeys = array( "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9" );
 288
 289 # Get a message from anywhere
 290 function wfMsg( $key ) {
 291         $args = func_get_args();
 292         if ( count( $args ) ) {
 293                 array_shift( $args );
 294         }
 295         return wfMsgReal( $key, $args, true );
 296 }
 297
 298 # Get a message from the language file
 299 function wfMsgNoDB( $key ) {
 300         $args = func_get_args();
 301         if ( count( $args ) ) {
 302                 array_shift( $args );
 303         }
 304         return wfMsgReal( $key, $args, false );
 305 }
 306
 307 # Really get a message
 308 function wfMsgReal( $key, $args, $useDB ) {
 309         global $wgReplacementKeys, $wgMessageCache, $wgLang;
 310
 311         $fname = 'wfMsg';
 312         wfProfileIn( $fname );
 313         if ( $wgMessageCache ) {
 314                 $message = $wgMessageCache->get( $key, $useDB );
 315         } elseif ( $wgLang ) {
 316                 $message = $wgLang->getMessage( $key );
 317         } else {
 318                 wfDebug( "No language object when getting $key\n" );
 319                 $message = "&lt;$key&gt;";
 320         }
 321
 322         # Replace arguments
 323         if( count( $args ) ) {
 324                 $message = str_replace( $wgReplacementKeys, $args, $message );
 325         }
 326         wfProfileOut( $fname );
 327         return $message;
 328 }
 329
 330 function wfCleanFormFields( $fields )
 331 {
 332         wfDebugDieBacktrace( 'Call to obsolete wfCleanFormFields(). Use wgRequest instead...' );
 333 }
 334
 335 function wfMungeQuotes( $in )
 336 {
 337         $out = str_replace( '%', '%25', $in );
 338         $out = str_replace( "'", '%27', $out );
 339         $out = str_replace( '"', '%22', $out );
 340         return $out;
 341 }
 342
 343 function wfDemungeQuotes( $in )
 344 {
 345         $out = str_replace( '%22', '"', $in );
 346         $out = str_replace( '%27', "'", $out );
 347         $out = str_replace( '%25', '%', $out );
 348         return $out;
 349 }
 350
 351 function wfCleanQueryVar( $var )
 352 {
 353         wfDebugDieBacktrace( 'Call to obsolete function wfCleanQueryVar(); use wgRequest instead' );
 354 }
 355
 356 function wfSearch( $s )
 357 {
 358         $se = new SearchEngine( $s );
 359         $se->showResults();
 360 }
 361
 362 function wfGo( $s )
 363 { # pick the nearest match
 364         $se = new SearchEngine( $s );
 365         $se->goResult();
 366 }
 367
 368 # Just like exit() but makes a note of it.
 369 # Commits open transactions except if the error parameter is set
 370 function wfAbruptExit( $error = false ){
 371         global $wgLoadBalancer;
 372         static $called = false;
 373         if ( $called ){
 374                 exit();
 375         }
 376         $called = true;
 377
 378         if( function_exists( 'debug_backtrace' ) ){ // PHP >= 4.3
 379                 $bt = debug_backtrace();
 380                 for($i = 0; $i < count($bt) ; $i++){
 381                         $file = $bt[$i]['file'];
 382                         $line = $bt[$i]['line'];
 383                         wfDebug("WARNING: Abrupt exit in $file at line $line\n");
 384                 }
 385         } else {
 386                 wfDebug('WARNING: Abrupt exit\n');
 387         }
 388         if ( !$error ) {
 389                 $wgLoadBalancer->closeAll();
 390         }
 391         exit();
 392 }
 393
 394 function wfErrorExit() {
 395         wfAbruptExit( true );
 396 }
 397
 398 function wfDebugDieBacktrace( $msg = '' ) {
 399         global $wgCommandLineMode;
 400
 401         if ( function_exists( 'debug_backtrace' ) ) {
 402                 if ( $wgCommandLineMode ) {
 403                         $msg .= "\nBacktrace:\n";
 404                 } else {
 405                         $msg .= "\n<p>Backtrace:</p>\n<ul>\n";
 406                 }
 407                 $backtrace = debug_backtrace();
 408                 foreach( $backtrace as $call ) {
 409                         $f = explode( DIRECTORY_SEPARATOR, $call['file'] );
 410                         $file = $f[count($f)-1];
 411                         if ( $wgCommandLineMode ) {
 412                                 $msg .= "$file line {$call['line']} calls ";
 413                         } else {
 414                                 $msg .= '<li>' . $file . " line " . $call['line'] . ' calls ';
 415                         }
 416                         if( !empty( $call['class'] ) ) $msg .= $call['class'] . '::';
 417                         $msg .= $call['function'] . "()";
 418
 419                         if ( $wgCommandLineMode ) {
 420                                 $msg .= "\n";
 421                         } else {
 422                                 $msg .= "</li>\n";
 423                         }
 424                 }
 425          }
 426          die( $msg );
 427 }
 428
 429 function wfNumberOfArticles()
 430 {
 431         global $wgNumberOfArticles;
 432
 433         wfLoadSiteStats();
 434         return $wgNumberOfArticles;
 435 }
 436
 437 /* private */ function wfLoadSiteStats()
 438 {
 439         global $wgNumberOfArticles, $wgTotalViews, $wgTotalEdits;
 440         $fname = 'wfLoadSiteStats';
 441
 442         if ( -1 != $wgNumberOfArticles ) return;
 443         $dbr =& wfGetDB( DB_SLAVE );
 444         $s = $dbr->getArray( 'site_stats',
 445                 array( 'ss_total_views', 'ss_total_edits', 'ss_good_articles' ),
 446                 array( 'ss_row_id' => 1 ), $fname
 447         );
 448
 449         if ( $s === false ) {
 450                 return;
 451         } else {
 452                 $wgTotalViews = $s->ss_total_views;
 453                 $wgTotalEdits = $s->ss_total_edits;
 454                 $wgNumberOfArticles = $s->ss_good_articles;
 455         }
 456 }
 457
 458 function wfEscapeHTML( $in )
 459 {
 460         return str_replace(
 461                 array( '&', '"', '>', '<' ),
 462                 array( '&amp;', '&quot;', '&gt;', '&lt;' ),
 463                 $in );
 464 }
 465
 466 function wfEscapeHTMLTagsOnly( $in ) {
 467         return str_replace(
 468                 array( '"', '>', '<' ),
 469                 array( '&quot;', '&gt;', '&lt;' ),
 470                 $in );
 471 }
 472
 473 function wfUnescapeHTML( $in )
 474 {
 475         $in = str_replace( '&lt;', '<', $in );
 476         $in = str_replace( '&gt;', '>', $in );
 477         $in = str_replace( '&quot;', '"', $in );
 478         $in = str_replace( '&amp;', '&', $in );
 479         return $in;
 480 }
 481
 482 function wfImageDir( $fname )
 483 {
 484         global $wgUploadDirectory;
 485
 486         $hash = md5( $fname );
 487         $oldumask = umask(0);
 488         $dest = $wgUploadDirectory . '/' . $hash{0};
 489         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
 490         $dest .= '/' . substr( $hash, 0, 2 );
 491         if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
 492
 493         umask( $oldumask );
 494         return $dest;
 495 }
 496
 497 function wfImageThumbDir( $fname , $subdir='thumb')
 498 {
 499         return wfImageArchiveDir( $fname, $subdir );
 500 }
 501
 502 function wfImageArchiveDir( $fname , $subdir='archive')
 503 {
 504         global $wgUploadDirectory;
 505
 506         $hash = md5( $fname );
 507         $oldumask = umask(0);
 508
 509         # Suppress warning messages here; if the file itself can't
 510         # be written we'll worry about it then.
 511         $archive = "{$wgUploadDirectory}/{$subdir}";
 512         if ( ! is_dir( $archive ) ) { @mkdir( $archive, 0777 ); }
 513         $archive .= '/' . $hash{0};
 514         if ( ! is_dir( $archive ) ) { @mkdir( $archive, 0777 ); }
 515         $archive .= '/' . substr( $hash, 0, 2 );
 516         if ( ! is_dir( $archive ) ) { @mkdir( $archive, 0777 ); }
 517
 518         umask( $oldumask );
 519         return $archive;
 520 }
 521
 522 function wfRecordUpload( $name, $oldver, $size, $desc, $copyStatus = "", $source = "" )
 523 {
 524         global $wgUser, $wgLang, $wgTitle, $wgOut, $wgDeferredUpdateList;
 525         global $wgUseCopyrightUpload;
 526
 527         $fname = 'wfRecordUpload';
 528         $dbw =& wfGetDB( DB_MASTER );
 529
 530         # img_name must be unique
 531         if ( !$dbw->indexUnique( 'image', 'img_name' ) ) {
 532                 wfDebugDieBacktrace( 'Database schema not up to date, please run maintenance/archives/patch-image_name_unique.sql' );
 533         }
 534
 535
 536         $now = wfTimestampNow();
 537         $won = wfInvertTimestamp( $now );
 538         $size = IntVal( $size );
 539
 540         if ( $wgUseCopyrightUpload )
 541           {
 542                 $textdesc = '== ' . wfMsg ( 'filedesc' ) . " ==\n" . $desc . "\n" .
 543                   '== ' . wfMsg ( 'filestatus' ) . " ==\n" . $copyStatus . "\n" .
 544                   '== ' . wfMsg ( 'filesource' ) . " ==\n" . $source ;
 545           }
 546         else $textdesc = $desc ;
 547
 548         $now = wfTimestampNow();
 549         $won = wfInvertTimestamp( $now );
 550
 551         # Test to see if the row exists using INSERT IGNORE
 552         # This avoids race conditions by locking the row until the commit, and also
 553         # doesn't deadlock. SELECT FOR UPDATE causes a deadlock for every race condition.
 554         $dbw->insert( 'image',
 555                 array(
 556                         'img_name' => $name,
 557                         'img_size'=> $size,
 558                         'img_timestamp' => $now,
 559                         'img_description' => $desc,
 560                         'img_user' => $wgUser->getID(),
 561                         'img_user_text' => $wgUser->getName(),
 562                 ), $fname, 'IGNORE'
 563         );
 564         $descTitle = Title::makeTitle( NS_IMAGE, $name );
 565
 566         if ( $dbw->affectedRows() ) {
 567                 # Successfully inserted, this is a new image
 568                 $id = $descTitle->getArticleID();
 569
 570                 if ( $id == 0 ) {
 571                         $seqVal = $dbw->nextSequenceValue( 'cur_cur_id_seq' );
 572                         $dbw->insertArray( 'cur',
 573                                 array(
 574                                         'cur_id' => $seqVal,
 575                                         'cur_namespace' => NS_IMAGE,
 576                                         'cur_title' => $name,
 577                                         'cur_comment' => $desc,
 578                                         'cur_user' => $wgUser->getID(),
 579                                         'cur_user_text' => $wgUser->getName(),
 580                                         'cur_timestamp' => $now,
 581                                         'cur_is_new' => 1,
 582                                         'cur_text' => $textdesc,
 583                                         'inverse_timestamp' => $won,
 584                                         'cur_touched' => $now
 585                                 ), $fname
 586                         );
 587                         $id = $dbw->insertId() or 0; # We should throw an error instead
 588
 589                         RecentChange::notifyNew( $now, $descTitle, 0, $wgUser, $desc );
 590
 591                         $u = new SearchUpdate( $id, $name, $desc );
 592                         $u->doUpdate();
 593                 }
 594         } else {
 595                 # Collision, this is an update of an image
 596                 # Get current image row for update
 597                 $s = $dbw->getArray( 'image', array( 'img_name','img_size','img_timestamp','img_description',
 598                   'img_user','img_user_text' ), array( 'img_name' => $name ), $fname, 'FOR UPDATE' );
 599
 600                 # Insert it into oldimage
 601                 $dbw->insertArray( 'oldimage',
 602                         array(
 603                                 'oi_name' => $s->img_name,
 604                                 'oi_archive_name' => $oldver,
 605                                 'oi_size' => $s->img_size,
 606                                 'oi_timestamp' => $s->img_timestamp,
 607                                 'oi_description' => $s->img_description,
 608                                 'oi_user' => $s->img_user,
 609                                 'oi_user_text' => $s->img_user_text
 610                         ), $fname
 611                 );
 612
 613                 # Update the current image row
 614                 $dbw->updateArray( 'image',
 615                         array( /* SET */
 616                                 'img_size' => $size,
 617                                 'img_timestamp' => wfTimestampNow(),
 618                                 'img_user' => $wgUser->getID(),
 619                                 'img_user_text' => $wgUser->getName(),
 620                                 'img_description' => $desc,
 621                         ), array( /* WHERE */
 622                                 'img_name' => $name
 623                         ), $fname
 624                 );
 625
 626                 # Invalidate the cache for the description page
 627                 $descTitle->invalidateCache();
 628         }
 629
 630         $log = new LogPage( wfMsg( 'uploadlogpage' ), wfMsg( 'uploadlogpagetext' ) );
 631         $da = wfMsg( 'uploadedimage', '[[:' . $wgLang->getNsText(
 632           Namespace::getImage() ) . ":{$name}|{$name}]]" );
 633         $ta = wfMsg( 'uploadedimage', $name );
 634         $log->addEntry( $da, $desc, $ta );
 635 }
 636
 637
 638 /* Some generic result counters, pulled out of SearchEngine */
 639
 640 function wfShowingResults( $offset, $limit )
 641 {
 642         global $wgLang;
 643         return wfMsg( 'showingresults', $wgLang->formatNum( $limit ), $wgLang->formatNum( $offset+1 ) );
 644 }
 645
 646 function wfShowingResultsNum( $offset, $limit, $num )
 647 {
 648         global $wgLang;
 649         return wfMsg( 'showingresultsnum', $wgLang->formatNum( $limit ), $wgLang->formatNum( $offset+1 ), $wgLang->formatNum( $num ) );
 650 }
 651
 652 function wfViewPrevNext( $offset, $limit, $link, $query = '', $atend = false )
 653 {
 654         global $wgUser, $wgLang;
 655         $fmtLimit = $wgLang->formatNum( $limit );
 656         $prev = wfMsg( 'prevn', $fmtLimit );
 657         $next = wfMsg( 'nextn', $fmtLimit );
 658         $link = wfUrlencode( $link );
 659
 660         $sk = $wgUser->getSkin();
 661         if ( 0 != $offset ) {
 662                 $po = $offset - $limit;
 663                 if ( $po < 0 ) { $po = 0; }
 664                 $q = "limit={$limit}&offset={$po}";
 665                 if ( '' != $query ) { $q .= "&{$query}"; }
 666                 $plink = '<a href="' . wfLocalUrlE( $link, $q ) . "\">{$prev}</a>";
 667         } else { $plink = $prev; }
 668
 669         $no = $offset + $limit;
 670         $q = "limit={$limit}&offset={$no}";
 671         if ( "" != $query ) { $q .= "&{$query}"; }
 672
 673         if ( $atend ) {
 674                 $nlink = $next;
 675         } else {
 676                 $nlink = '<a href="' . wfLocalUrlE( $link, $q ) . "\">{$next}</a>";
 677         }
 678         $nums = wfNumLink( $offset, 20, $link , $query ) . ' | ' .
 679           wfNumLink( $offset, 50, $link, $query ) . ' | ' .
 680           wfNumLink( $offset, 100, $link, $query ) . ' | ' .
 681           wfNumLink( $offset, 250, $link, $query ) . ' | ' .
 682           wfNumLink( $offset, 500, $link, $query );
 683
 684         return wfMsg( 'viewprevnext', $plink, $nlink, $nums );
 685 }
 686
 687 function wfNumLink( $offset, $limit, $link, $query = '' )
 688 {
 689         global $wgUser, $wgLang;
 690         if ( '' == $query ) { $q = ''; }
 691         else { $q = "{$query}&"; }
 692         $q .= "limit={$limit}&offset={$offset}";
 693
 694         $fmtLimit = $wgLang->formatNum( $limit );
 695         $s = '<a href="' . wfLocalUrlE( $link, $q ) . "\">{$fmtLimit}</a>";
 696         return $s;
 697 }
 698
 699 function wfClientAcceptsGzip() {
 700         global $wgUseGzip;
 701         if( $wgUseGzip ) {
 702                 # FIXME: we may want to blacklist some broken browsers
 703                 if( preg_match(
 704                         '/\bgzip(?:;(q)=([0-9]+(?:\.[0-9]+)))?\b/',
 705                         $_SERVER['HTTP_ACCEPT_ENCODING'],
 706                         $m ) ) {
 707                         if( isset( $m[2] ) && ( $m[1] == 'q' ) && ( $m[2] == 0 ) ) return false;
 708                         wfDebug( " accepts gzip\n" );
 709                         return true;
 710                 }
 711         }
 712         return false;
 713 }
 714
 715 # Yay, more global functions!
 716 function wfCheckLimits( $deflimit = 50, $optionname = 'rclimit' ) {
 717         global $wgUser, $wgRequest;
 718
 719         $limit = $wgRequest->getInt( 'limit', 0 );
 720         if( $limit < 0 ) $limit = 0;
 721         if( ( $limit == 0 ) && ( $optionname != '' ) ) {
 722                 $limit = (int)$wgUser->getOption( $optionname );
 723         }
 724         if( $limit <= 0 ) $limit = $deflimit;
 725         if( $limit > 5000 ) $limit = 5000; # We have *some* limits...
 726
 727         $offset = $wgRequest->getInt( 'offset', 0 );
 728         if( $offset < 0 ) $offset = 0;
 729
 730         return array( $limit, $offset );
 731 }
 732
 733 # Escapes the given text so that it may be output using addWikiText()
 734 # without any linking, formatting, etc. making its way through. This
 735 # is achieved by substituting certain characters with HTML entities.
 736 # As required by the callers, <nowiki> is not used. It currently does
 737 # not filter out characters which have special meaning only at the
 738 # start of a line, such as "*".
 739 function wfEscapeWikiText( $text )
 740 {
 741         $text = str_replace(
 742                 array( '[',             '|',      "'",     'ISBN '        , '://'         , "\n=" ),
 743                 array( '&#91;', '&#124;', '&#39;', 'ISBN&#32;', '&#58;//' , "\n&#61;" ),
 744                 htmlspecialchars($text) );
 745         return $text;
 746 }
 747
 748 function wfQuotedPrintable( $string, $charset = '' )
 749 {
 750         # Probably incomplete; see RFC 2045
 751         if( empty( $charset ) ) {
 752                 global $wgInputEncoding;
 753                 $charset = $wgInputEncoding;
 754         }
 755         $charset = strtoupper( $charset );
 756         $charset = str_replace( 'ISO-8859', 'ISO8859', $charset ); // ?
 757
 758         $illegal = '\x00-\x08\x0b\x0c\x0e-\x1f\x7f-\xff=';
 759         $replace = $illegal . '\t ?_';
 760         if( !preg_match( "/[$illegal]/", $string ) ) return $string;
 761         $out = "=?$charset?Q?";
 762         $out .= preg_replace( "/([$replace])/e", 'sprintf("=%02X",ord("$1"))', $string );
 763         $out .= '?=';
 764         return $out;
 765 }
 766
 767 function wfTime(){
 768         $st = explode( ' ', microtime() );
 769         return (float)$st[0] + (float)$st[1];
 770 }
 771
 772 # Changes the first character to an HTML entity
 773 function wfHtmlEscapeFirst( $text ) {
 774         $ord = ord($text);
 775         $newText = substr($text, 1);
 776         return "&#$ord;$newText";
 777 }
 778
 779 # Sets dest to source and returns the original value of dest
 780 # If source is NULL, it just returns the value, it doesn't set the variable
 781 function wfSetVar( &$dest, $source )
 782 {
 783         $temp = $dest;
 784         if ( !is_null( $source ) ) {
 785                 $dest = $source;
 786         }
 787         return $temp;
 788 }
 789
 790 # As for wfSetVar except setting a bit
 791 function wfSetBit( &$dest, $bit, $state = true ) {
 792         $temp = (bool)($dest & $bit );
 793         if ( !is_null( $state ) ) {
 794                 if ( $state ) {
 795                         $dest |= $bit;
 796                 } else {
 797                         $dest &= ~$bit;
 798                 }
 799         }
 800         return $temp;
 801 }
 802
 803 # This function takes two arrays as input, and returns a CGI-style string, e.g.
 804 # "days=7&limit=100". Options in the first array override options in the second.
 805 # Options set to "" will not be output.
 806 function wfArrayToCGI( $array1, $array2 = NULL )
 807 {
 808         if ( !is_null( $array2 ) ) {
 809                 $array1 = $array1 + $array2;
 810         }
 811
 812         $cgi = '';
 813         foreach ( $array1 as $key => $value ) {
 814                 if ( '' !== $value ) {
 815                         if ( '' != $cgi ) {
 816                                 $cgi .= '&';
 817                         }
 818                         $cgi .= "{$key}={$value}";
 819                 }
 820         }
 821         return $cgi;
 822 }
 823
 824 # This is obsolete, use SquidUpdate::purge()
 825 function wfPurgeSquidServers ($urlArr) {
 826         SquidUpdate::purge( $urlArr );
 827 }
 828
 829 # Windows-compatible version of escapeshellarg()
 830 function wfEscapeShellArg( )
 831 {
 832         $args = func_get_args();
 833         $first = true;
 834         $retVal = '';
 835         foreach ( $args as $arg ) {
 836                 if ( !$first ) {
 837                         $retVal .= ' ';
 838                 } else {
 839                         $first = false;
 840                 }
 841
 842                 if ( wfIsWindows() ) {
 843                         $retVal .= '"' . str_replace( '"','\"', $arg ) . '"';
 844                 } else {
 845                         $retVal .= escapeshellarg( $arg );
 846                 }
 847         }
 848         return $retVal;
 849 }
 850
 851 # wfMerge attempts to merge differences between three texts.
 852 # Returns true for a clean merge and false for failure or a conflict.
 853
 854 function wfMerge( $old, $mine, $yours, &$result ){
 855         global $wgDiff3;
 856
 857         # This check may also protect against code injection in
 858         # case of broken installations.
 859         if(! file_exists( $wgDiff3 ) ){
 860                 return false;
 861         }
 862
 863         # Make temporary files
 864         $td = '/tmp/';
 865         $oldtextFile = fopen( $oldtextName = tempnam( $td, 'merge-old-' ), 'w' );
 866         $mytextFile = fopen( $mytextName = tempnam( $td, 'merge-mine-' ), 'w' );
 867         $yourtextFile = fopen( $yourtextName = tempnam( $td, 'merge-your-' ), 'w' );
 868
 869         fwrite( $oldtextFile, $old ); fclose( $oldtextFile );
 870         fwrite( $mytextFile, $mine ); fclose( $mytextFile );
 871         fwrite( $yourtextFile, $yours ); fclose( $yourtextFile );
 872
 873         # Check for a conflict
 874         $cmd = wfEscapeShellArg( $wgDiff3 ) . ' -a --overlap-only ' .
 875           wfEscapeShellArg( $mytextName ) . ' ' .
 876           wfEscapeShellArg( $oldtextName ) . ' ' .
 877           wfEscapeShellArg( $yourtextName );
 878         $handle = popen( $cmd, 'r' );
 879
 880         if( fgets( $handle ) ){
 881                 $conflict = true;
 882         } else {
 883                 $conflict = false;
 884         }
 885         pclose( $handle );
 886
 887         # Merge differences
 888         $cmd = wfEscapeShellArg( $wgDiff3 ) . ' -a -e --merge ' .
 889           wfEscapeShellArg( $mytextName, $oldtextName, $yourtextName );
 890         $handle = popen( $cmd, 'r' );
 891         $result = '';
 892         do {
 893                 $data = fread( $handle, 8192 );
 894                 if ( strlen( $data ) == 0 ) {
 895                         break;
 896                 }
 897                 $result .= $data;
 898         } while ( true );
 899         pclose( $handle );
 900         unlink( $mytextName ); unlink( $oldtextName ); unlink( $yourtextName );
 901         return ! $conflict;
 902 }
 903
 904 function wfVarDump( $var )
 905 {
 906         global $wgOut;
 907         $s = str_replace("\n","<br>\n", var_export( $var, true ) . "\n");
 908         if ( headers_sent() || !@is_object( $wgOut ) ) {
 909                 print $s;
 910         } else {
 911                 $wgOut->addHTML( $s );
 912         }
 913 }
 914
 915 # Provide a simple HTTP error.
 916 function wfHttpError( $code, $label, $desc ) {
 917         global $wgOut;
 918         $wgOut->disable();
 919         header( "HTTP/1.0 $code $label" );
 920         header( "Status: $code $label" );
 921         $wgOut->sendCacheControl();
 922
 923         # Don't send content if it's a HEAD request.
 924         if( $_SERVER['REQUEST_METHOD'] == 'HEAD' ) {
 925                 header( 'Content-type: text/plain' );
 926                 print "$desc\n";
 927         }
 928 }
 929
 930 # Converts an Accept-* header into an array mapping string values to quality factors
 931 function wfAcceptToPrefs( $accept, $def = '*/*' ) {
 932         # No arg means accept anything (per HTTP spec)
 933         if( !$accept ) {
 934                 return array( $def => 1 );
 935         }
 936
 937         $prefs = array();
 938
 939         $parts = explode( ',', $accept );
 940
 941         foreach( $parts as $part ) {
 942                 # FIXME: doesn't deal with params like 'text/html; level=1'
 943                 @list( $value, $qpart ) = explode( ';', $part );
 944                 if( !isset( $qpart ) ) {
 945                         $prefs[$value] = 1;
 946                 } elseif( preg_match( '/q\s*=\s*(\d*\.\d+)/', $qpart, $match ) ) {
 947                         $prefs[$value] = $match[1];
 948                 }
 949         }
 950
 951         return $prefs;
 952 }
 953
 954 /* private */ function mimeTypeMatch( $type, $avail ) {
 955         if( array_key_exists($type, $avail) ) {
 956                 return $type;
 957         } else {
 958                 $parts = explode( '/', $type );
 959                 if( array_key_exists( $parts[0] . '/*', $avail ) ) {
 960                         return $parts[0] . '/*';
 961                 } elseif( array_key_exists( '*/*', $avail ) ) {
 962                         return '*/*';
 963                 } else {
 964                         return NULL;
 965                 }
 966         }
 967 }
 968
 969 # FIXME: doesn't handle params like 'text/plain; charset=UTF-8'
 970 # XXX: generalize to negotiate other stuff
 971 function wfNegotiateType( $cprefs, $sprefs ) {
 972         $combine = array();
 973
 974         foreach( array_keys($sprefs) as $type ) {
 975                 $parts = explode( '/', $type );
 976                 if( $parts[1] != '*' ) {
 977                         $ckey = mimeTypeMatch( $type, $cprefs );
 978                         if( $ckey ) {
 979                                 $combine[$type] = $sprefs[$type] * $cprefs[$ckey];
 980                         }
 981                 }
 982         }
 983
 984         foreach( array_keys( $cprefs ) as $type ) {
 985                 $parts = explode( '/', $type );
 986                 if( $parts[1] != '*' && !array_key_exists( $type, $sprefs ) ) {
 987                         $skey = mimeTypeMatch( $type, $sprefs );
 988                         if( $skey ) {
 989                                 $combine[$type] = $sprefs[$skey] * $cprefs[$type];
 990                         }
 991                 }
 992         }
 993
 994         $bestq = 0;
 995         $besttype = NULL;
 996
 997         foreach( array_keys( $combine ) as $type ) {
 998                 if( $combine[$type] > $bestq ) {
 999                         $besttype = $type;
1000                         $bestq = $combine[$type];
1001                 }
1002         }
1003
1004         return $besttype;
1005 }
1006
1007 # Array lookup
1008 # Returns an array where the values in the first array are replaced by the
1009 # values in the second array with the corresponding keys
1010 function wfArrayLookup( $a, $b )
1011 {
1012         return array_flip( array_intersect( array_flip( $a ), array_keys( $b ) ) );
1013 }
1014
1015 # Since Windows is so different to any of the other popular OSes, it seems appropriate
1016 # to have a simple way to test for its presence
1017 function wfIsWindows() {
1018         if (substr(php_uname(), 0, 7) == 'Windows') {
1019                 return true;
1020         } else {
1021                 return false;
1022         }
1023 }
1024
1025
1026 # Ideally we'd be using actual time fields in the db
1027 function wfTimestamp2Unix( $ts ) {
1028         return gmmktime( ( (int)substr( $ts, 8, 2) ),
1029                   (int)substr( $ts, 10, 2 ), (int)substr( $ts, 12, 2 ),
1030                   (int)substr( $ts, 4, 2 ), (int)substr( $ts, 6, 2 ),
1031                   (int)substr( $ts, 0, 4 ) );
1032 }
1033
1034 function wfUnix2Timestamp( $unixtime ) {
1035         return gmdate( "YmdHis", $unixtime );
1036 }
1037
1038 function wfTimestampNow() {
1039         # return NOW
1040         return gmdate( "YmdHis" );
1041 }
1042
1043 # Sorting hack for MySQL 3, which doesn't use index sorts for DESC
1044 function wfInvertTimestamp( $ts ) {
1045         return strtr(
1046                 $ts,
1047                 "0123456789",
1048                 "9876543210"
1049         );
1050 }
1051
1052 # Reference-counted warning suppression
1053 function wfSuppressWarnings( $end = false ) {
1054         static $suppressCount = 0;
1055         static $originalLevel = false;
1056
1057         if ( $end ) {
1058                 if ( $suppressCount ) {
1059                         $suppressCount --;
1060                         if ( !$suppressCount ) {
1061                                 error_reporting( $originalLevel );
1062                         }
1063                 }
1064         } else {
1065                 if ( !$suppressCount ) {
1066                         $originalLevel = error_reporting( E_ALL & ~( E_WARNING | E_NOTICE ) );
1067                 }
1068                 $suppressCount++;
1069         }
1070 }
1071
1072 # Restore error level to previous value
1073 function wfRestoreWarnings() {
1074         wfSuppressWarnings( true );
1075 }
1076
1077 # Autodetect, convert and provide timestamps of various types
1078 define("TS_UNIX",0);    # Standard unix timestamp (number of seconds since 1 Jan 1970)
1079 define("TS_MW",1);      # Mediawiki concatenated string timestamp (yyyymmddhhmmss)
1080 define("TS_DB",2);      # Standard database timestamp (yyyy-mm-dd hh:mm:ss)
1081
1082 function wfTimestamp($outputtype=TS_UNIX,$ts=0) {
1083         if (preg_match("/^(\d{4})\-(\d\d)\-(\d\d) (\d\d):(\d\d):(\d\d)$/",$ts,$da)) {
1084                 # TS_DB
1085                 $uts=gmmktime((int)$da[4],(int)$da[5],(int)$da[6],
1086                             (int)$da[2],(int)$da[3],(int)$da[1]);
1087         } elseif (preg_match("/^(\d{4})(\d\d)(\d\d)(\d\d)(\d\d)(\d\d)$/",$ts,$da)) {
1088                 # TS_MW
1089                 $uts=gmmktime((int)$da[4],(int)$da[5],(int)$da[6],
1090                             (int)$da[2],(int)$da[3],(int)$da[1]);
1091         } elseif (preg_match("/^(\d{1,13})$/",$ts,$datearray)) {
1092                 # TS_UNIX
1093                 $uts=$ts;
1094         }
1095
1096         if ($ts==0)
1097                 $uts=time();
1098         switch($outputtype) {
1099         case TS_UNIX:
1100                 return $uts;
1101                 break;
1102         case TS_MW:
1103                 return gmdate( "YmdHis", $uts );
1104                 break;
1105         case TS_DB:
1106                 return gmdate( "Y-m-d H:i:s", $uts );
1107                 break;
1108         default:
1109                 return;
1110         }
1111 }
1112
1113 ?>