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