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