includes/Title.php

   1 <?php
   2 # See title.doc
   3
   4 $wgTitleInterwikiCache = array();
   5
   6 # Title class
   7 #
   8 # * Represents a title, which may contain an interwiki designation or namespace
   9 # * Can fetch various kinds of data from the database, albeit inefficiently.
  10 #
  11 class Title {
  12         # All member variables should be considered private
  13         # Please use the accessor functions
  14
  15         var $mTextform;           # Text form (spaces not underscores) of the main part
  16         var $mUrlform;            # URL-encoded form of the main part
  17         var $mDbkeyform;          # Main part with underscores
  18         var $mNamespace;          # Namespace index, i.e. one of the NS_xxxx constants
  19         var $mInterwiki;          # Interwiki prefix (or null string)
  20         var $mFragment;           # Title fragment (i.e. the bit after the #)
  21         var $mArticleID;          # Article ID, fetched from the link cache on demand
  22         var $mRestrictions;       # Array of groups allowed to edit this article
  23                               # Only null or "sysop" are supported
  24         var $mRestrictionsLoaded; # Boolean for initialisation on demand
  25         var $mPrefixedText;       # Text form including namespace/interwiki, initialised on demand
  26         var $mDefaultNamespace;   # Namespace index when there is no namespace
  27                               # Zero except in {{transclusion}} tags
  28
  29 #----------------------------------------------------------------------------
  30 #   Construction
  31 #----------------------------------------------------------------------------
  32
  33         /* private */ function Title()
  34         {
  35                 $this->mInterwiki = $this->mUrlform =
  36                 $this->mTextform = $this->mDbkeyform = "";
  37                 $this->mArticleID = -1;
  38                 $this->mNamespace = 0;
  39                 $this->mRestrictionsLoaded = false;
  40                 $this->mRestrictions = array();
  41         $this->mDefaultNamespace = 0;
  42         }
  43
  44         # From a prefixed DB key
  45         /* static */ function newFromDBkey( $key )
  46         {
  47                 $t = new Title();
  48                 $t->mDbkeyform = $key;
  49                 if( $t->secureAndSplit() )
  50                         return $t;
  51                 else
  52                         return NULL;
  53         }
  54
  55         # From text, such as what you would find in a link
  56         /* static */ function newFromText( $text, $defaultNamespace = 0 )
  57         {
  58                 $fname = "Title::newFromText";
  59                 wfProfileIn( $fname );
  60
  61                 if( is_object( $text ) ) {
  62                         wfDebugDieBacktrace( "Called with object instead of string." );
  63                 }
  64                 global $wgInputEncoding;
  65                 $text = do_html_entity_decode( $text, ENT_COMPAT, $wgInputEncoding );
  66
  67                 $text = wfMungeToUtf8( $text );
  68
  69
  70                 # What was this for? TS 2004-03-03
  71                 # $text = urldecode( $text );
  72
  73                 $t = new Title();
  74                 $t->mDbkeyform = str_replace( " ", "_", $text );
  75                 $t->mDefaultNamespace = $defaultNamespace;
  76
  77                 wfProfileOut( $fname );
  78                 if ( !is_object( $t ) ) {
  79                         var_dump( debug_backtrace() );
  80                 }
  81                 if( $t->secureAndSplit() ) {
  82                         return $t;
  83                 } else {
  84                         return NULL;
  85                 }
  86         }
  87
  88         # From a URL-encoded title
  89         /* static */ function newFromURL( $url )
  90         {
  91                 global $wgLang, $wgServer, $wgIsMySQL, $wgIsPg;
  92                 $t = new Title();
  93
  94                 # For compatibility with old buggy URLs. "+" is not valid in titles,
  95                 # but some URLs used it as a space replacement and they still come
  96                 # from some external search tools.
  97                 $s = str_replace( "+", " ", $url );
  98
  99                 # For links that came from outside, check for alternate/legacy
 100                 # character encoding.
 101                 wfDebug( "Servr: $wgServer\n" );
 102                 if( empty( $_SERVER["HTTP_REFERER"] ) ||
 103                         strncmp($wgServer, $_SERVER["HTTP_REFERER"], strlen( $wgServer ) ) )
 104                 {
 105                         $s = $wgLang->checkTitleEncoding( $s );
 106                 } else {
 107                         wfDebug( "Refer: {$_SERVER['HTTP_REFERER']}\n" );
 108                 }
 109
 110                 $t->mDbkeyform = str_replace( " ", "_", $s );
 111                 if( $t->secureAndSplit() ) {
 112                         # check that lenght of title is < cur_title size
 113                         if ($wgIsMySQL) {
 114                                 $sql = "SHOW COLUMNS FROM cur LIKE \"cur_title\";";
 115                                 $cur_title_object = wfFetchObject(wfQuery( $sql, DB_READ ));
 116
 117                                 preg_match( "/\((.*)\)/", $cur_title_object->Type, $cur_title_type);
 118                                 $cur_title_size=$cur_title_type[1];
 119                         } else {
 120                                 /* midom:FIXME pg_field_type does not return varchar length
 121                                    assume 255 */
 122                                 $cur_title_size=255;
 123                         }
 124
 125                         if (strlen($t->mDbkeyform) > $cur_title_size ) {
 126                                 return NULL;
 127                         }
 128
 129                         return $t;
 130                 } else {
 131                         return NULL;
 132                 }
 133         }
 134
 135         # From a cur_id
 136         # This is inefficiently implemented, the cur row is requested but not
 137         # used for anything else
 138         /* static */ function newFromID( $id )
 139         {
 140                 $fname = "Title::newFromID";
 141                 $row = wfGetArray( "cur", array( "cur_namespace", "cur_title" ),
 142                         array( "cur_id" => $id ), $fname );
 143                 if ( $row !== false ) {
 144                         $title = Title::makeTitle( $row->cur_namespace, $row->cur_title );
 145                 } else {
 146                         $title = NULL;
 147                 }
 148                 return $title;
 149         }
 150
 151         # From a namespace index and a DB key
 152         /* static */ function makeTitle( $ns, $title )
 153         {
 154                 $t = new Title();
 155                 $t->mDbkeyform = Title::makeName( $ns, $title );
 156                 if( $t->secureAndSplit() ) {
 157                         return $t;
 158                 } else {
 159                         return NULL;
 160                 }
 161         }
 162
 163         function newMainPage()
 164         {
 165                 return Title::newFromText( wfMsg( "mainpage" ) );
 166         }
 167
 168 #----------------------------------------------------------------------------
 169 #       Static functions
 170 #----------------------------------------------------------------------------
 171
 172         # Get the prefixed DB key associated with an ID
 173         /* static */ function nameOf( $id )
 174         {
 175                 $sql = "SELECT cur_namespace,cur_title FROM cur WHERE " .
 176                   "cur_id={$id}";
 177                 $res = wfQuery( $sql, DB_READ, "Article::nameOf" );
 178                 if ( 0 == wfNumRows( $res ) ) { return NULL; }
 179
 180                 $s = wfFetchObject( $res );
 181                 $n = Title::makeName( $s->cur_namespace, $s->cur_title );
 182                 return $n;
 183         }
 184
 185         # Get a regex character class describing the legal characters in a link
 186         /* static */ function legalChars()
 187         {
 188                 # Missing characters:
 189                 #  * []|# Needed for link syntax
 190                 #  * % and + are corrupted by Apache when they appear in the path
 191                 #
 192                 # % seems to work though
 193                 #
 194                 # The problem with % is that URLs are double-unescaped: once by Apache's
 195                 # path conversion code, and again by PHP. So %253F, for example, becomes "?".
 196                 # Our code does not double-escape to compensate for this, indeed double escaping
 197                 # would break if the double-escaped title was passed in the query string
 198                 # rather than the path. This is a minor security issue because articles can be
 199                 # created such that they are hard to view or edit. -- TS
 200                 #
 201                 # Theoretically 0x80-0x9F of ISO 8859-1 should be disallowed, but
 202                 # this breaks interlanguage links
 203
 204                 $set = " %!\"$&'()*,\\-.\\/0-9:;=?@A-Z\\\\^_`a-z{}~\\x80-\\xFF";
 205                 return $set;
 206         }
 207
 208         # Returns a stripped-down a title string ready for the search index
 209         # Takes a namespace index and a text-form main part
 210         /* static */ function indexTitle( $ns, $title )
 211         {
 212                 global $wgDBminWordLen, $wgLang;
 213
 214                 $lc = SearchEngine::legalSearchChars() . "&#;";
 215                 $t = $wgLang->stripForSearch( $title );
 216                 $t = preg_replace( "/[^{$lc}]+/", " ", $t );
 217                 $t = strtolower( $t );
 218
 219                 # Handle 's, s'
 220                 $t = preg_replace( "/([{$lc}]+)'s( |$)/", "\\1 \\1's ", $t );
 221                 $t = preg_replace( "/([{$lc}]+)s'( |$)/", "\\1s ", $t );
 222
 223                 $t = preg_replace( "/\\s+/", " ", $t );
 224
 225                 if ( $ns == Namespace::getImage() ) {
 226                         $t = preg_replace( "/ (png|gif|jpg|jpeg|ogg)$/", "", $t );
 227                 }
 228                 return trim( $t );
 229         }
 230
 231         # Make a prefixed DB key from a DB key and a namespace index
 232         /* static */ function makeName( $ns, $title )
 233         {
 234                 global $wgLang;
 235
 236                 $n = $wgLang->getNsText( $ns );
 237                 if ( "" == $n ) { return $title; }
 238                 else { return "{$n}:{$title}"; }
 239         }
 240
 241         # Arguably static
 242         # Returns the URL associated with an interwiki prefix
 243         # The URL contains $1, which is replaced by the title
 244         function getInterwikiLink( $key )
 245         {
 246                 global $wgMemc, $wgDBname, $wgInterwikiExpiry, $wgTitleInterwikiCache;
 247                 global $wgLoadBalancer;
 248
 249                 $k = "$wgDBname:interwiki:$key";
 250
 251                 if( array_key_exists( $k, $wgTitleInterwikiCache ) )
 252                         return $wgTitleInterwikiCache[$k]->iw_url;
 253
 254                 $s = $wgMemc->get( $k );
 255                 # Ignore old keys with no iw_local
 256                 if( $s && isset( $s->iw_local ) ) {
 257                         $wgTitleInterwikiCache[$k] = $s;
 258                         return $s->iw_url;
 259                 }
 260                 $dkey = wfStrencode( $key );
 261                 $wgLoadBalancer->force(-1);
 262                 $query = "SELECT iw_url,iw_local FROM interwiki WHERE iw_prefix='$dkey'";
 263                 $res = wfQuery( $query, DB_READ, "Title::getInterwikiLink" );
 264                 $wgLoadBalancer->force(0);
 265                 if(!$res) return "";
 266
 267                 $s = wfFetchObject( $res );
 268                 if(!$s) {
 269                         $s = (object)false;
 270                         $s->iw_url = "";
 271                 }
 272                 $wgMemc->set( $k, $s, $wgInterwikiExpiry );
 273                 $wgTitleInterwikiCache[$k] = $s;
 274                 return $s->iw_url;
 275         }
 276
 277         function isLocal() {
 278                 global $wgTitleInterwikiCache, $wgDBname;
 279
 280                 if ( $this->mInterwiki != "" ) {
 281                         # Make sure key is loaded into cache
 282                         $this->getInterwikiLink( $this->mInterwiki );
 283                         $k = "$wgDBname:interwiki:" . $this->mInterwiki;
 284                         return (bool)($wgTitleInterwikiCache[$k]->iw_local);
 285                 } else {
 286                         return true;
 287                 }
 288         }
 289
 290         # Update the cur_touched field for an array of title objects
 291         # Inefficient unless the IDs are already loaded into the link cache
 292         /* static */ function touchArray( $titles, $timestamp = "" ) {
 293                 if ( count( $titles ) == 0 ) {
 294                         return;
 295                 }
 296                 if ( $timestamp == "" ) {
 297                         $timestamp = wfTimestampNow();
 298                 }
 299                 $sql = "UPDATE cur SET cur_touched='{$timestamp}' WHERE cur_id IN (";
 300                 $first = true;
 301
 302                 foreach ( $titles as $title ) {
 303                         if ( ! $first ) {
 304                                 $sql .= ",";
 305                         }
 306
 307                         $first = false;
 308                         $sql .= $title->getArticleID();
 309                 }
 310                 $sql .= ")";
 311                 if ( ! $first ) {
 312                         wfQuery( $sql, DB_WRITE, "Title::touchArray" );
 313                 }
 314         }
 315
 316 #----------------------------------------------------------------------------
 317 #       Other stuff
 318 #----------------------------------------------------------------------------
 319
 320         # Simple accessors
 321         # See the definitions at the top of this file
 322
 323         function getText() { return $this->mTextform; }
 324         function getPartialURL() { return $this->mUrlform; }
 325         function getDBkey() { return $this->mDbkeyform; }
 326         function getNamespace() { return $this->mNamespace; }
 327         function setNamespace( $n ) { $this->mNamespace = $n; }
 328         function getInterwiki() { return $this->mInterwiki; }
 329         function getFragment() { return $this->mFragment; }
 330         function getDefaultNamespace() { return $this->mDefaultNamespace; }
 331
 332         # Get title for search index
 333         function getIndexTitle()
 334         {
 335                 return Title::indexTitle( $this->mNamespace, $this->mTextform );
 336         }
 337
 338         # Get prefixed title with underscores
 339         function getPrefixedDBkey()
 340         {
 341                 $s = $this->prefix( $this->mDbkeyform );
 342                 $s = str_replace( " ", "_", $s );
 343                 return $s;
 344         }
 345
 346         # Get prefixed title with spaces
 347         # This is the form usually used for display
 348         function getPrefixedText()
 349         {
 350                 if ( empty( $this->mPrefixedText ) ) {
 351                         $s = $this->prefix( $this->mTextform );
 352                         $s = str_replace( "_", " ", $s );
 353                         $this->mPrefixedText = $s;
 354                 }
 355                 return $this->mPrefixedText;
 356         }
 357
 358         # Get a URL-encoded title (not an actual URL) including interwiki
 359         function getPrefixedURL()
 360         {
 361                 $s = $this->prefix( $this->mDbkeyform );
 362                 $s = str_replace( " ", "_", $s );
 363
 364                 $s = wfUrlencode ( $s ) ;
 365
 366                 # Cleaning up URL to make it look nice -- is this safe?
 367                 $s = preg_replace( "/%3[Aa]/", ":", $s );
 368                 $s = preg_replace( "/%2[Ff]/", "/", $s );
 369                 $s = str_replace( "%28", "(", $s );
 370                 $s = str_replace( "%29", ")", $s );
 371
 372                 return $s;
 373         }
 374
 375         # Get a real URL referring to this title, with interwiki link and fragment
 376         function getFullURL( $query = "" )
 377         {
 378                 global $wgLang, $wgArticlePath, $wgServer, $wgScript;
 379
 380                 if ( "" == $this->mInterwiki ) {
 381                         $p = $wgArticlePath;
 382                         return $wgServer . $this->getLocalUrl( $query );
 383                 }
 384
 385                 $p = $this->getInterwikiLink( $this->mInterwiki );
 386                 $n = $wgLang->getNsText( $this->mNamespace );
 387                 if ( "" != $n ) { $n .= ":"; }
 388                 $u = str_replace( "$1", $n . $this->mUrlform, $p );
 389                 return $u;
 390         }
 391
 392         # Get a URL with an optional query string, no fragment
 393         # * If $query=="", it will use $wgArticlePath
 394         # * Returns a full for an interwiki link, loses any query string
 395         # * Optionally adds the server and escapes for HTML
 396         # * Setting $query to "-" makes an old-style URL with nothing in the
 397         #   query except a title
 398
 399         function getURL() {
 400                 die( "Call to obsolete obsolete function Title::getURL()" );
 401         }
 402
 403         function getLocalURL( $query = "" )
 404         {
 405                 global $wgLang, $wgArticlePath, $wgScript;
 406
 407                 if ( $this->isExternal() ) {
 408                         return $this->getFullURL();
 409                 }
 410
 411                 $dbkey = wfUrlencode( $this->getPrefixedDBkey() );
 412                 if ( $query == "" ) {
 413                         $url = str_replace( "$1", $dbkey, $wgArticlePath );
 414                 } else {
 415                         if ( $query == "-" ) {
 416                                 $query = "";
 417                         }
 418                         if ( $wgScript != "" ) {
 419                                 $url = "{$wgScript}?title={$dbkey}&{$query}";
 420                         } else {
 421                                 # Top level wiki
 422                                 $url = "/{$dbkey}?{$query}";
 423                         }
 424                 }
 425                 return $url;
 426         }
 427
 428         function escapeLocalURL( $query = "" ) {
 429                 return wfEscapeHTML( $this->getLocalURL( $query ) );
 430         }
 431
 432         function escapeFullURL( $query = "" ) {
 433                 return wfEscapeHTML( $this->getFullURL( $query ) );
 434         }
 435
 436         function getInternalURL( $query = "" ) {
 437                 # Used in various Squid-related code, in case we have a different
 438                 # internal hostname for the server than the exposed one.
 439                 global $wgInternalServer;
 440                 return $wgInternalServer . $this->getLocalURL( $query );
 441         }
 442
 443         # Get the edit URL, or a null string if it is an interwiki link
 444         function getEditURL()
 445         {
 446                 global $wgServer, $wgScript;
 447
 448                 if ( "" != $this->mInterwiki ) { return ""; }
 449                 $s = $this->getLocalURL( "action=edit" );
 450
 451                 return $s;
 452         }
 453
 454         # Get HTML-escaped displayable text
 455         # For the title field in <a> tags
 456         function getEscapedText()
 457         {
 458                 return wfEscapeHTML( $this->getPrefixedText() );
 459         }
 460
 461         # Is the title interwiki?
 462         function isExternal() { return ( "" != $this->mInterwiki ); }
 463
 464         # Does the title correspond to a protected article?
 465         function isProtected()
 466         {
 467                 if ( -1 == $this->mNamespace ) { return true; }
 468                 $a = $this->getRestrictions();
 469                 if ( in_array( "sysop", $a ) ) { return true; }
 470                 return false;
 471         }
 472
 473         # Is the page a log page, i.e. one where the history is messed up by
 474         # LogPage.php? This used to be used for suppressing diff links in recent
 475         # changes, but now that's done by setting a flag in the recentchanges
 476         # table. Hence, this probably is no longer used.
 477         function isLog()
 478         {
 479                 if ( $this->mNamespace != Namespace::getWikipedia() ) {
 480                         return false;
 481                 }
 482                 if ( ( 0 == strcmp( wfMsg( "uploadlogpage" ), $this->mDbkeyform ) ) ||
 483                   ( 0 == strcmp( wfMsg( "dellogpage" ), $this->mDbkeyform ) ) ) {
 484                         return true;
 485                 }
 486                 return false;
 487         }
 488
 489         # Is $wgUser is watching this page?
 490         function userIsWatching()
 491         {
 492                 global $wgUser;
 493
 494                 if ( -1 == $this->mNamespace ) { return false; }
 495                 if ( 0 == $wgUser->getID() ) { return false; }
 496
 497                 return $wgUser->isWatched( $this );
 498         }
 499
 500         # Can $wgUser edit this page?
 501         function userCanEdit()
 502         {
 503                 global $wgUser;
 504                 if ( -1 == $this->mNamespace ) { return false; }
 505                 if ( NS_MEDIAWIKI == $this->mNamespace && !$wgUser->isSysop() ) { return false; }
 506                 # if ( 0 == $this->getArticleID() ) { return false; }
 507                 if ( $this->mDbkeyform == "_" ) { return false; }
 508                 # protect global styles and js
 509                 if ( NS_MEDIAWIKI == $this->mNamespace
 510                      && preg_match("/\\.(css|js)$/", $this->mTextform )
 511                      && !$wgUser->isSysop() )
 512                 { return false; }
 513                 //if ( $this->isCssJsSubpage() and !$this->userCanEditCssJsSubpage() ) { return false; }
 514                 # protect css/js subpages of user pages
 515                 # XXX: this might be better using restrictions
 516                 # XXX: Find a way to work around the php bug that prevents using $this->userCanEditCssJsSubpage() from working
 517                 if( Namespace::getUser() == $this->mNamespace
 518                         and preg_match("/\\.(css|js)$/", $this->mTextform )
 519                         and !$wgUser->isSysop()
 520                         and !preg_match("/^".preg_quote($wgUser->getName(), '/')."/", $this->mTextform) )
 521                 { return false; }
 522                 $ur = $wgUser->getRights();
 523                 foreach ( $this->getRestrictions() as $r ) {
 524                         if ( "" != $r && ( ! in_array( $r, $ur ) ) ) {
 525                                 return false;
 526                         }
 527                 }
 528                 return true;
 529         }
 530
 531         function userCanRead() {
 532                 global $wgUser;
 533                 global $wgWhitelistRead;
 534
 535                 if( 0 != $wgUser->getID() ) return true;
 536                 if( !is_array( $wgWhitelistRead ) ) return true;
 537
 538                 $name = $this->getPrefixedText();
 539                 if( in_array( $name, $wgWhitelistRead ) ) return true;
 540
 541                 # Compatibility with old settings
 542                 if( $this->getNamespace() == NS_MAIN ) {
 543                         if( in_array( ":" . $name, $wgWhitelistRead ) ) return true;
 544                 }
 545                 return false;
 546         }
 547
 548         function isCssJsSubpage() {
 549                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.(css|js)$/", $this->mTextform ) );
 550         }
 551         function isCssSubpage() {
 552                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.css$/", $this->mTextform ) );
 553         }
 554         function isJsSubpage() {
 555                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.js$/", $this->mTextform ) );
 556         }
 557         function userCanEditCssJsSubpage() {
 558                 # protect css/js subpages of user pages
 559                 # XXX: this might be better using restrictions
 560                 global $wgUser;
 561                 return ( $wgUser->isSysop() or preg_match("/^".preg_quote($wgUser->getName())."/", $this->mTextform) );
 562         }
 563
 564         # Accessor/initialisation for mRestrictions
 565         function getRestrictions()
 566         {
 567                 $id = $this->getArticleID();
 568                 if ( 0 == $id ) { return array(); }
 569
 570                 if ( ! $this->mRestrictionsLoaded ) {
 571                         $res = wfGetSQL( "cur", "cur_restrictions", "cur_id=$id" );
 572                         $this->mRestrictions = explode( ",", trim( $res ) );
 573                         $this->mRestrictionsLoaded = true;
 574                 }
 575                 return $this->mRestrictions;
 576         }
 577
 578         # Is there a version of this page in the deletion archive?
 579         function isDeleted() {
 580                 $ns = $this->getNamespace();
 581                 $t = wfStrencode( $this->getDBkey() );
 582                 $sql = "SELECT COUNT(*) AS n FROM archive WHERE ar_namespace=$ns AND ar_title='$t'";
 583                 if( $res = wfQuery( $sql, DB_READ ) ) {
 584                         $s = wfFetchObject( $res );
 585                         return $s->n;
 586                 }
 587                 return 0;
 588         }
 589
 590         # Get the article ID from the link cache
 591         # Used very heavily, e.g. in Parser::replaceInternalLinks()
 592         function getArticleID()
 593         {
 594                 global $wgLinkCache;
 595
 596                 if ( -1 != $this->mArticleID ) { return $this->mArticleID; }
 597                 $this->mArticleID = $wgLinkCache->addLinkObj( $this );
 598                 return $this->mArticleID;
 599         }
 600
 601         # This clears some fields in this object, and clears any associated keys in the
 602         # "bad links" section of $wgLinkCache. This is called from Article::insertNewArticle()
 603         # to allow loading of the new cur_id. It's also called from Article::doDeleteArticle()
 604         function resetArticleID( $newid )
 605         {
 606                 global $wgLinkCache;
 607                 $wgLinkCache->clearBadLink( $this->getPrefixedDBkey() );
 608
 609                 if ( 0 == $newid ) { $this->mArticleID = -1; }
 610                 else { $this->mArticleID = $newid; }
 611                 $this->mRestrictionsLoaded = false;
 612                 $this->mRestrictions = array();
 613         }
 614
 615         # Updates cur_touched
 616         # Called from LinksUpdate.php
 617         function invalidateCache() {
 618                 $now = wfTimestampNow();
 619                 $ns = $this->getNamespace();
 620                 $ti = wfStrencode( $this->getDBkey() );
 621                 $sql = "UPDATE cur SET cur_touched='$now' WHERE cur_namespace=$ns AND cur_title='$ti'";
 622                 return wfQuery( $sql, DB_WRITE, "Title::invalidateCache" );
 623         }
 624
 625         # Prefixes some arbitrary text with the namespace or interwiki prefix of this object
 626         /* private */ function prefix( $name )
 627         {
 628                 global $wgLang;
 629
 630                 $p = "";
 631                 if ( "" != $this->mInterwiki ) {
 632                         $p = $this->mInterwiki . ":";
 633                 }
 634                 if ( 0 != $this->mNamespace ) {
 635                         $p .= $wgLang->getNsText( $this->mNamespace ) . ":";
 636                 }
 637                 return $p . $name;
 638         }
 639
 640         # Secure and split - main initialisation function for this object
 641         #
 642         # Assumes that mDbkeyform has been set, and is urldecoded
 643     # and uses undersocres, but not otherwise munged.  This function
 644     # removes illegal characters, splits off the winterwiki and
 645     # namespace prefixes, sets the other forms, and canonicalizes
 646     # everything.
 647         #
 648         /* private */ function secureAndSplit()
 649         {
 650                 global $wgLang, $wgLocalInterwiki, $wgCapitalLinks;
 651                 $fname = "Title::secureAndSplit";
 652                 wfProfileIn( $fname );
 653
 654                 static $imgpre = false;
 655                 static $rxTc = false;
 656
 657                 # Initialisation
 658                 if ( $imgpre === false ) {
 659                         $imgpre = ":" . $wgLang->getNsText( Namespace::getImage() ) . ":";
 660                         # % is needed as well
 661                         $rxTc = "/[^" . Title::legalChars() . "]/";
 662                 }
 663
 664                 $this->mInterwiki = $this->mFragment = "";
 665                 $this->mNamespace = $this->mDefaultNamespace; # Usually NS_MAIN
 666
 667                 # Clean up whitespace
 668                 #
 669                 $t = preg_replace( "/[\\s_]+/", "_", $this->mDbkeyform );
 670                 $t = preg_replace( '/^_*(.*?)_*$/', '$1', $t );
 671
 672                 if ( "" == $t ) {
 673                         wfProfileOut( $fname );
 674                         return false;
 675                 }
 676
 677                 $this->mDbkeyform = $t;
 678                 $done = false;
 679
 680                 # :Image: namespace
 681                 if ( 0 == strncasecmp( $imgpre, $t, strlen( $imgpre ) ) ) {
 682                         $t = substr( $t, 1 );
 683                 }
 684
 685                 # Initial colon indicating main namespace
 686                 if ( ":" == $t{0} ) {
 687                         $r = substr( $t, 1 );
 688                         $this->mNamespace = NS_MAIN;
 689                 } else {
 690                         # Namespace or interwiki prefix
 691                         if ( preg_match( "/^(.+?)_*:_*(.*)$/", $t, $m ) ) {
 692                                 #$p = strtolower( $m[1] );
 693                                 $p = $m[1];
 694                                 $lowerNs = strtolower( $p );
 695                                 if ( $ns = Namespace::getCanonicalIndex( $lowerNs ) ) {
 696                                         # Canonical namespace
 697                                         $t = $m[2];
 698                                         $this->mNamespace = $ns;
 699                                 } elseif ( $ns = $wgLang->getNsIndex( $lowerNs )) {
 700                                         # Ordinary namespace
 701                                         $t = $m[2];
 702                                         $this->mNamespace = $ns;
 703                                 } elseif ( $this->getInterwikiLink( $p ) ) {
 704                                         # Interwiki link
 705                                         $t = $m[2];
 706                                         $this->mInterwiki = $p;
 707
 708                                         if ( !preg_match( "/^([A-Za-z0-9_\\x80-\\xff]+):(.*)$/", $t, $m ) ) {
 709                                                 $done = true;
 710                                         } elseif($this->mInterwiki != $wgLocalInterwiki) {
 711                                                 $done = true;
 712                                         }
 713                                 }
 714                         }
 715                         $r = $t;
 716                 }
 717
 718                 # Redundant interwiki prefix to the local wiki
 719                 if ( 0 == strcmp( $this->mInterwiki, $wgLocalInterwiki ) ) {
 720                         $this->mInterwiki = "";
 721                 }
 722                 # We already know that some pages won't be in the database!
 723                 #
 724                 if ( "" != $this->mInterwiki || -1 == $this->mNamespace ) {
 725                         $this->mArticleID = 0;
 726                 }
 727                 $f = strstr( $r, "#" );
 728                 if ( false !== $f ) {
 729                         $this->mFragment = substr( $f, 1 );
 730                         $r = substr( $r, 0, strlen( $r ) - strlen( $f ) );
 731                 }
 732
 733                 # Reject illegal characters.
 734                 #
 735                 if( preg_match( $rxTc, $r ) ) {
 736                         return false;
 737                 }
 738
 739                 # "." and ".." conflict with the directories of those namesa
 740                 if ( strpos( $r, "." ) !== false &&
 741                      ( $r === "." || $r === ".." ||
 742                        strpos( $r, "./" ) === 0 ||
 743                        strpos( $r, "/./" !== false ) ||
 744                        strpos( $r, "/../" !== false ) ) )
 745                 {
 746                         return false;
 747                 }
 748
 749                 # Initial capital letter
 750                 if( $wgCapitalLinks && $this->mInterwiki == "") {
 751                         $t = $wgLang->ucfirst( $r );
 752                 }
 753
 754                 # Fill fields
 755                 $this->mDbkeyform = $t;
 756                 $this->mUrlform = wfUrlencode( $t );
 757
 758                 $this->mTextform = str_replace( "_", " ", $t );
 759
 760                 wfProfileOut( $fname );
 761                 return true;
 762         }
 763
 764         # Get a title object associated with the talk page of this article
 765         function getTalkPage() {
 766                 return Title::makeTitle( Namespace::getTalk( $this->getNamespace() ), $this->getDBkey() );
 767         }
 768
 769         # Get a title object associated with the subject page of this talk page
 770         function getSubjectPage() {
 771                 return Title::makeTitle( Namespace::getSubject( $this->getNamespace() ), $this->getDBkey() );
 772         }
 773
 774         # Get an array of Title objects linking to this title
 775         # Also stores the IDs in the link cache
 776         function getLinksTo( $options = '' ) {
 777                 global $wgLinkCache;
 778                 $id = $this->getArticleID();
 779                 $sql = "SELECT cur_namespace,cur_title,cur_id FROM cur,links WHERE l_from=cur_id AND l_to={$id} $options";
 780                 $res = wfQuery( $sql, DB_READ, "Title::getLinksTo" );
 781                 $retVal = array();
 782                 if ( wfNumRows( $res ) ) {
 783                         while ( $row = wfFetchObject( $res ) ) {
 784                                 if ( $titleObj = Title::makeTitle( $row->cur_namespace, $row->cur_title ) ) {
 785                                         $wgLinkCache->addGoodLink( $row->cur_id, $titleObj->getPrefixedDBkey() );
 786                                         $retVal[] = $titleObj;
 787                                 }
 788                         }
 789                 }
 790                 wfFreeResult( $res );
 791                 return $retVal;
 792         }
 793
 794         # Get an array of Title objects linking to this non-existent title
 795         # Also stores the IDs in the link cache
 796         function getBrokenLinksTo( $options = '' ) {
 797                 global $wgLinkCache;
 798                 $encTitle = wfStrencode( $this->getPrefixedDBkey() );
 799                 $sql = "SELECT cur_namespace,cur_title,cur_id FROM brokenlinks,cur " .
 800                   "WHERE bl_from=cur_id AND bl_to='$encTitle' $options";
 801                 $res = wfQuery( $sql, DB_READ, "Title::getBrokenLinksTo" );
 802                 $retVal = array();
 803                 if ( wfNumRows( $res ) ) {
 804                         while ( $row = wfFetchObject( $res ) ) {
 805                                 $titleObj = Title::makeTitle( $row->cur_namespace, $row->cur_title );
 806                                 $wgLinkCache->addGoodLink( $row->cur_id, $titleObj->getPrefixedDBkey() );
 807                                 $retVal[] = $titleObj;
 808                         }
 809                 }
 810                 wfFreeResult( $res );
 811                 return $retVal;
 812         }
 813
 814         function getSquidURLs() {
 815                 return array(
 816                         $this->getInternalURL(),
 817                         $this->getInternalURL( "action=history" )
 818                 );
 819         }
 820
 821         function moveNoAuth( &$nt ) {
 822                 return $this->moveTo( $nt, false );
 823         }
 824
 825         # Move a title to a new location
 826         # Returns true on success, message name on failure
 827         # auth indicates whether wgUser's permissions should be checked
 828         function moveTo( &$nt, $auth = true ) {
 829                 if( !$this or !$nt ) {
 830                         return "badtitletext";
 831                 }
 832
 833                 $fname = "Title::move";
 834                 $oldid = $this->getArticleID();
 835                 $newid = $nt->getArticleID();
 836
 837                 if ( strlen( $nt->getDBkey() ) < 1 ) {
 838                         return "articleexists";
 839                 }
 840                 if ( ( ! Namespace::isMovable( $this->getNamespace() ) ) ||
 841                          ( "" == $this->getDBkey() ) ||
 842                          ( "" != $this->getInterwiki() ) ||
 843                          ( !$oldid ) ||
 844                      ( ! Namespace::isMovable( $nt->getNamespace() ) ) ||
 845                          ( "" == $nt->getDBkey() ) ||
 846                          ( "" != $nt->getInterwiki() ) ) {
 847                         return "badarticleerror";
 848                 }
 849
 850                 if ( $auth && ( !$this->userCanEdit() || !$nt->userCanEdit() ) ) {
 851                         return "protectedpage";
 852                 }
 853
 854                 # The move is allowed only if (1) the target doesn't exist, or
 855                 # (2) the target is a redirect to the source, and has no history
 856                 # (so we can undo bad moves right after they're done).
 857
 858                 if ( 0 != $newid ) { # Target exists; check for validity
 859                         if ( ! $this->isValidMoveTarget( $nt ) ) {
 860                                 return "articleexists";
 861                         }
 862                         $this->moveOverExistingRedirect( $nt );
 863                 } else { # Target didn't exist, do normal move.
 864                         $this->moveToNewTitle( $nt, $newid );
 865                 }
 866
 867                 # Update watchlists
 868
 869                 $oldnamespace = $this->getNamespace() & ~1;
 870                 $newnamespace = $nt->getNamespace() & ~1;
 871                 $oldtitle = $this->getDBkey();
 872                 $newtitle = $nt->getDBkey();
 873
 874                 if( $oldnamespace != $newnamespace && $oldtitle != $newtitle ) {
 875                         WatchedItem::duplicateEntries( $this, $nt );
 876                 }
 877
 878                 # Update search engine
 879                 $u = new SearchUpdate( $oldid, $nt->getPrefixedDBkey() );
 880                 $u->doUpdate();
 881                 $u = new SearchUpdate( $newid, $this->getPrefixedDBkey(), "" );
 882                 $u->doUpdate();
 883
 884                 return true;
 885         }
 886
 887         # Move page to title which is presently a redirect to the source page
 888
 889         /* private */ function moveOverExistingRedirect( &$nt )
 890         {
 891                 global $wgUser, $wgLinkCache, $wgUseSquid, $wgMwRedir;
 892                 $fname = "Title::moveOverExistingRedirect";
 893                 $comment = wfMsg( "1movedto2", $this->getPrefixedText(), $nt->getPrefixedText() );
 894
 895         $now = wfTimestampNow();
 896         $won = wfInvertTimestamp( $now );
 897                 $newid = $nt->getArticleID();
 898                 $oldid = $this->getArticleID();
 899
 900                 # Change the name of the target page:
 901                 wfUpdateArray(
 902                         /* table */ 'cur',
 903                         /* SET */ array(
 904                                 'cur_touched' => $now,
 905                                 'cur_namespace' => $nt->getNamespace(),
 906                                 'cur_title' => $nt->getDBkey()
 907                         ),
 908                         /* WHERE */ array( 'cur_id' => $oldid ),
 909                         $fname
 910                 );
 911                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
 912
 913                 # Repurpose the old redirect. We don't save it to history since
 914                 # by definition if we've got here it's rather uninteresting.
 915
 916                 $redirectText = $wgMwRedir->getSynonym( 0 ) . " [[" . $nt->getPrefixedText() . "]]\n";
 917                 wfUpdateArray(
 918                         /* table */ 'cur',
 919                         /* SET */ array(
 920                                 'cur_touched' => $now,
 921                                 'cur_timestamp' => $now,
 922                                 'inverse_timestamp' => $won,
 923                                 'cur_namespace' => $this->getNamespace(),
 924                                 'cur_title' => $this->getDBkey(),
 925                                 'cur_text' => $wgMwRedir->getSynonym( 0 ) . " [[" . $nt->getPrefixedText() . "]]\n",
 926                                 'cur_comment' => $comment,
 927                                 'cur_user' => $wgUser->getID(),
 928                                 'cur_minor_edit' => 0,
 929                                 'cur_counter' => 0,
 930                                 'cur_restrictions' => '',
 931                                 'cur_user_text' => $wgUser->getName(),
 932                                 'cur_is_redirect' => 1,
 933                                 'cur_is_new' => 1
 934                         ),
 935                         /* WHERE */ array( 'cur_id' => $newid ),
 936                         $fname
 937                 );
 938
 939                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
 940
 941                 # Fix the redundant names for the past revisions of the target page.
 942                 # The redirect should have no old revisions.
 943                 wfUpdateArray(
 944                         /* table */ 'old',
 945                         /* SET */ array(
 946                                 'old_namespace' => $nt->getNamespace(),
 947                                 'old_title' => $nt->getDBkey(),
 948                         ),
 949                         /* WHERE */ array(
 950                                 'old_namespace' => $this->getNamespace(),
 951                                 'old_title' => $this->getDBkey(),
 952                         ),
 953                         $fname
 954                 );
 955
 956                 RecentChange::notifyMoveOverRedirect( $now, $this, $nt, $wgUser, $comment );
 957
 958                 # Swap links
 959
 960                 # Load titles and IDs
 961                 $linksToOld = $this->getLinksTo( 'FOR UPDATE' );
 962                 $linksToNew = $nt->getLinksTo( 'FOR UPDATE' );
 963
 964                 # Delete them all
 965                 $sql = "DELETE FROM links WHERE l_to=$oldid OR l_to=$newid";
 966                 wfQuery( $sql, DB_WRITE, $fname );
 967
 968                 # Reinsert
 969                 if ( count( $linksToOld ) || count( $linksToNew )) {
 970                         $sql = "INSERT INTO links (l_from,l_to) VALUES ";
 971                         $first = true;
 972
 973                         # Insert links to old title
 974                         foreach ( $linksToOld as $linkTitle ) {
 975                                 if ( $first ) {
 976                                         $first = false;
 977                                 } else {
 978                                         $sql .= ",";
 979                                 }
 980                                 $id = $linkTitle->getArticleID();
 981                                 $sql .= "($id,$newid)";
 982                         }
 983
 984                         # Insert links to new title
 985                         foreach ( $linksToNew as $linkTitle ) {
 986                                 if ( $first ) {
 987                                         $first = false;
 988                                 } else {
 989                                         $sql .= ",";
 990                                 }
 991                                 $id = $linkTitle->getArticleID();
 992                                 $sql .= "($id, $oldid)";
 993                         }
 994
 995                         wfQuery( $sql, DB_WRITE, $fname );
 996                 }
 997
 998                 # Now, we record the link from the redirect to the new title.
 999                 # It should have no other outgoing links...
1000                 $sql = "DELETE FROM links WHERE l_from={$newid}";
1001                 wfQuery( $sql, DB_WRITE, $fname );
1002                 $sql = "INSERT INTO links (l_from,l_to) VALUES ({$newid},{$oldid})";
1003                 wfQuery( $sql, DB_WRITE, $fname );
1004
1005                 # Clear linkscc
1006                 LinkCache::linksccClearLinksTo( $oldid );
1007                 LinkCache::linksccClearLinksTo( $newid );
1008
1009                 # Purge squid
1010                 if ( $wgUseSquid ) {
1011                         $urls = array_merge( $nt->getSquidURLs(), $this->getSquidURLs() );
1012                         $u = new SquidUpdate( $urls );
1013                         $u->doUpdate();
1014                 }
1015         }
1016
1017         # Move page to non-existing title.
1018         # Sets $newid to be the new article ID
1019
1020         /* private */ function moveToNewTitle( &$nt, &$newid )
1021         {
1022                 global $wgUser, $wgLinkCache, $wgUseSquid;
1023                 $fname = "MovePageForm::moveToNewTitle";
1024                 $comment = wfMsg( "1movedto2", $this->getPrefixedText(), $nt->getPrefixedText() );
1025
1026                 $now = wfTimestampNow();
1027                 $won = wfInvertTimestamp( $now );
1028                 $newid = $nt->getArticleID();
1029                 $oldid = $this->getArticleID();
1030
1031                 # Rename cur entry
1032                 wfUpdateArray(
1033                         /* table */ 'cur',
1034                         /* SET */ array(
1035                                 'cur_touched' => $now,
1036                                 'cur_namespace' => $nt->getNamespace(),
1037                                 'cur_title' => $nt->getDBkey()
1038                         ),
1039                         /* WHERE */ array( 'cur_id' => $oldid ),
1040                         $fname
1041                 );
1042
1043                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
1044
1045                 # Insert redirct
1046                 wfInsertArray( 'cur', array(
1047                         'cur_namespace' => $this->getNamespace(),
1048                         'cur_title' => $this->getDBkey(),
1049                         'cur_comment' => $comment,
1050                         'cur_user' => $wgUser->getID(),
1051                         'cur_user_text' => $wgUser->getName(),
1052                         'cur_timestamp' => $now,
1053                         'inverse_timestamp' => $won,
1054                         'cur_touched' => $now,
1055                         'cur_is_redirect' => 1,
1056                         'cur_is_new' => 1,
1057                         'cur_text' => "#REDIRECT [[" . $nt->getPrefixedText() . "]]\n" )
1058                 );
1059                 $newid = wfInsertId();
1060                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
1061
1062                 # Rename old entries
1063                 wfUpdateArray(
1064                         /* table */ 'old',
1065                         /* SET */ array(
1066                                 'old_namespace' => $nt->getNamespace(),
1067                                 'old_title' => $nt->getDBkey()
1068                         ),
1069                         /* WHERE */ array(
1070                                 'old_namespace' => $this->getNamespace(),
1071                                 'old_title' => $this->getDBkey()
1072                         ), $fname
1073                 );
1074
1075                 # Record in RC
1076                 RecentChange::notifyMoveToNew( $now, $this, $nt, $wgUser, $comment );
1077
1078                 # Purge squid and linkscc as per article creation
1079                 Article::onArticleCreate( $nt );
1080
1081                 # Any text links to the old title must be reassigned to the redirect
1082                 $sql = "UPDATE links SET l_to={$newid} WHERE l_to={$oldid}";
1083                 wfQuery( $sql, DB_WRITE, $fname );
1084                 LinkCache::linksccClearLinksTo( $oldid );
1085
1086                 # Record the just-created redirect's linking to the page
1087                 $sql = "INSERT INTO links (l_from,l_to) VALUES ({$newid},{$oldid})";
1088                 wfQuery( $sql, DB_WRITE, $fname );
1089
1090                 # Non-existent target may have had broken links to it; these must
1091                 # now be removed and made into good links.
1092                 $update = new LinksUpdate( $oldid, $nt->getPrefixedDBkey() );
1093                 $update->fixBrokenLinks();
1094
1095                 # Purge old title from squid
1096                 # The new title, and links to the new title, are purged in Article::onArticleCreate()
1097                 $titles = $nt->getLinksTo();
1098                 if ( $wgUseSquid ) {
1099                         $urls = $this->getSquidURLs();
1100                         foreach ( $titles as $linkTitle ) {
1101                                 $urls[] = $linkTitle->getInternalURL();
1102                         }
1103                         $u = new SquidUpdate( $urls );
1104                         $u->doUpdate();
1105                 }
1106         }
1107
1108         # Checks if $this can be moved to $nt
1109         # Both titles must exist in the database, otherwise it will blow up
1110         function isValidMoveTarget( $nt )
1111         {
1112                 $fname = "Title::isValidMoveTarget";
1113
1114                 # Is it a redirect?
1115                 $id  = $nt->getArticleID();
1116                 $sql = "SELECT cur_is_redirect,cur_text FROM cur " .
1117                   "WHERE cur_id={$id}";
1118                 $res = wfQuery( $sql, DB_READ, $fname );
1119                 $obj = wfFetchObject( $res );
1120
1121                 if ( 0 == $obj->cur_is_redirect ) {
1122                         # Not a redirect
1123                         return false;
1124                 }
1125
1126                 # Does the redirect point to the source?
1127                 if ( preg_match( "/\\[\\[\\s*([^\\]]*)]]/", $obj->cur_text, $m ) ) {
1128                         $redirTitle = Title::newFromText( $m[1] );
1129                         if ( 0 != strcmp( $redirTitle->getPrefixedDBkey(), $this->getPrefixedDBkey() ) ) {
1130                                 return false;
1131                         }
1132                 }
1133
1134                 # Does the article have a history?
1135                 $row = wfGetArray( 'old', array( 'old_id' ), array(
1136                         'old_namespace' => $nt->getNamespace(),
1137                         'old_title' => $nt->getDBkey() )
1138                 );
1139
1140                 # Return true if there was no history
1141                 return $row === false;
1142         }
1143
1144         # Create a redirect, fails if the title already exists, does not notify RC
1145         # Returns success
1146         function createRedirect( $dest, $comment ) {
1147                 global $wgUser;
1148                 if ( $this->getArticleID() ) {
1149                         return false;
1150                 }
1151
1152                 $now = wfTimestampNow();
1153                 $won = wfInvertTimestamp( $now );
1154
1155                 wfInsertArray( 'cur', array(
1156                         'cur_namespace' => $this->getNamespace(),
1157                         'cur_title' => $this->getDBkey(),
1158                         'cur_comment' => $comment,
1159                         'cur_user' => $wgUser->getID(),
1160                         'cur_user_text' => $wgUser->getName(),
1161                         'cur_timestamp' => $now,
1162                         'inverse_timestamp' => $won,
1163                         'cur_touched' => $now,
1164                         'cur_is_redirect' => 1,
1165                         'cur_is_new' => 1,
1166                         'cur_text' => "#REDIRECT [[" . $dest->getPrefixedText() . "]]\n"
1167                 ));
1168                 $newid = wfInsertId();
1169                 $this->resetArticleID( $newid );
1170
1171                 # Link table
1172                 if ( $dest->getArticleID() ) {
1173                         wfInsertArray( 'links', array(
1174                                 'l_to' => $dest->getArticleID(),
1175                                 'l_from' => $newid
1176                         ));
1177                 } else {
1178                         wfInsertArray( 'brokenlinks', array(
1179                                 'bl_to' => $dest->getPrefixedDBkey(),
1180                                 'bl_from' => $newid
1181                         ));
1182                 }
1183
1184                 Article::onArticleCreate( $this );
1185                 return true;
1186         }
1187
1188         # Get categories to wich belong this title and return an array of
1189         # categories names.
1190         function getParentCategories( )
1191         {
1192                 global $wgLang,$wgUser;
1193
1194                 #$titlekey = wfStrencode( $this->getArticleID() );
1195                 $titlekey = $this->getArticleId();
1196                 $cns = Namespace::getCategory();
1197                 $sk =& $wgUser->getSkin();
1198                 $parents = array();
1199
1200                 # get the parents categories of this title from the database
1201                 $sql = "SELECT DISTINCT cur_id FROM cur,categorylinks
1202                         WHERE cl_from='$titlekey' AND cl_to=cur_title AND cur_namespace='$cns'
1203                                 ORDER BY cl_sortkey" ;
1204                 $res = wfQuery ( $sql, DB_READ ) ;
1205
1206                 if(wfNumRows($res) > 0) {
1207                         while ( $x = wfFetchObject ( $res ) ) $data[] = $x ;
1208                         wfFreeResult ( $res ) ;
1209                 } else {
1210                         $data = '';
1211                 }
1212                 return $data;
1213         }
1214
1215         # will get the parents and grand-parents
1216         # TODO : not sure what's happening when a loop happen like:
1217         #       Encyclopedia > Astronomy > Encyclopedia
1218         function getAllParentCategories(&$stack)
1219         {
1220                 global $wgUser,$wgLang;
1221                 $result = '';
1222
1223                 # getting parents
1224                 $parents = $this->getParentCategories( );
1225
1226                 if($parents == '')
1227                 {
1228                         # The current element has no more parent so we dump the stack
1229                         # and make a clean line of categories
1230                         $sk =& $wgUser->getSkin() ;
1231
1232                         foreach ( array_reverse($stack) as $child => $parent )
1233                         {
1234                                 # make a link of that parent
1235                                 $result .= $sk->makeLink($wgLang->getNSText ( Namespace::getCategory() ).":".$parent,$parent);
1236                                 $result .= ' &gt; ';
1237                                 $lastchild = $child;
1238                         }
1239                         # append the last child.
1240                         # TODO : We should have a last child unless there is an error in the
1241                         # "categorylinks" table.
1242                         if(isset($lastchild)) { $result .= $lastchild; }
1243
1244                         $result .= "<br/>\n";
1245
1246                         # now we can empty the stack
1247                         $stack = array();
1248
1249                 } else {
1250                         # look at parents of current category
1251                         foreach($parents as $parent)
1252                         {
1253                                 # create a title object for the parent
1254                                 $tpar = Title::newFromID($parent->cur_id);
1255                                 # add it to the stack
1256                                 $stack[$this->getText()] = $tpar->getText();
1257                                 # grab its parents
1258                                 $result .= $tpar->getAllParentCategories($stack);
1259                         }
1260                 }
1261
1262                 if(isset($result)) { return $result; }
1263                 else { return ''; };
1264         }
1265
1266
1267 }
1268 ?>