includes/Title.php

   1 <?php
   2 /**
   3  * See title.txt
   4  *
   5  * @package MediaWiki
   6  */
   7
   8 /** */
   9 require_once( 'normal/UtfNormal.php' );
  10
  11 $wgTitleInterwikiCache = array();
  12 $wgTitleCache = array();
  13
  14 define ( 'GAID_FOR_UPDATE', 1 );
  15
  16 # Title::newFromTitle maintains a cache to avoid
  17 # expensive re-normalization of commonly used titles.
  18 # On a batch operation this can become a memory leak
  19 # if not bounded. After hitting this many titles,
  20 # reset the cache.
  21 define( 'MW_TITLECACHE_MAX', 1000 );
  22
  23 /**
  24  * Title class
  25  * - Represents a title, which may contain an interwiki designation or namespace
  26  * - Can fetch various kinds of data from the database, albeit inefficiently.
  27  *
  28  * @package MediaWiki
  29  */
  30 class Title {
  31         /**
  32          * All member variables should be considered private
  33          * Please use the accessor functions
  34          */
  35
  36          /**#@+
  37          * @access private
  38          */
  39
  40         var $mTextform;           # Text form (spaces not underscores) of the main part
  41         var $mUrlform;            # URL-encoded form of the main part
  42         var $mDbkeyform;          # Main part with underscores
  43         var $mNamespace;          # Namespace index, i.e. one of the NS_xxxx constants
  44         var $mInterwiki;          # Interwiki prefix (or null string)
  45         var $mFragment;           # Title fragment (i.e. the bit after the #)
  46         var $mArticleID;          # Article ID, fetched from the link cache on demand
  47         var $mLatestID;         # ID of most recent revision
  48         var $mRestrictions;       # Array of groups allowed to edit this article
  49                               # Only null or "sysop" are supported
  50         var $mRestrictionsLoaded; # Boolean for initialisation on demand
  51         var $mPrefixedText;       # Text form including namespace/interwiki, initialised on demand
  52         var $mDefaultNamespace;   # Namespace index when there is no namespace
  53                               # Zero except in {{transclusion}} tags
  54         var $mWatched;            # Is $wgUser watching this page? NULL if unfilled, accessed through userIsWatching()
  55         /**#@-*/
  56
  57
  58         /**
  59          * Constructor
  60          * @access private
  61          */
  62         /* private */ function Title() {
  63                 $this->mInterwiki = $this->mUrlform =
  64                 $this->mTextform = $this->mDbkeyform = '';
  65                 $this->mArticleID = -1;
  66                 $this->mNamespace = NS_MAIN;
  67                 $this->mRestrictionsLoaded = false;
  68                 $this->mRestrictions = array();
  69                 # Dont change the following, NS_MAIN is hardcoded in several place
  70                 # See bug #696
  71                 $this->mDefaultNamespace = NS_MAIN;
  72                 $this->mWatched = NULL;
  73                 $this->mLatestID = false;
  74         }
  75
  76         /**
  77          * Create a new Title from a prefixed DB key
  78          * @param string $key The database key, which has underscores
  79          *      instead of spaces, possibly including namespace and
  80          *      interwiki prefixes
  81          * @return Title the new object, or NULL on an error
  82          * @static
  83          * @access public
  84          */
  85         /* static */ function newFromDBkey( $key ) {
  86                 $t = new Title();
  87                 $t->mDbkeyform = $key;
  88                 if( $t->secureAndSplit() )
  89                         return $t;
  90                 else
  91                         return NULL;
  92         }
  93
  94         /**
  95          * Create a new Title from text, such as what one would
  96          * find in a link. Decodes any HTML entities in the text.
  97          *
  98          * @param string $text the link text; spaces, prefixes,
  99          *      and an initial ':' indicating the main namespace
 100          *      are accepted
 101          * @param int $defaultNamespace the namespace to use if
 102          *      none is specified by a prefix
 103          * @return Title the new object, or NULL on an error
 104          * @static
 105          * @access public
 106          */
 107         function newFromText( $text, $defaultNamespace = NS_MAIN ) {
 108                 global $wgTitleCache;
 109                 $fname = 'Title::newFromText';
 110                 wfProfileIn( $fname );
 111
 112                 if( is_object( $text ) ) {
 113                         wfDebugDieBacktrace( 'Title::newFromText given an object' );
 114                 }
 115
 116                 /**
 117                  * Wiki pages often contain multiple links to the same page.
 118                  * Title normalization and parsing can become expensive on
 119                  * pages with many links, so we can save a little time by
 120                  * caching them.
 121                  *
 122                  * In theory these are value objects and won't get changed...
 123                  */
 124                 if( $defaultNamespace == NS_MAIN && isset( $wgTitleCache[$text] ) ) {
 125                         wfProfileOut( $fname );
 126                         return $wgTitleCache[$text];
 127                 }
 128
 129                 /**
 130                  * Convert things like &eacute; &#257; or &#x3017; into real text...
 131                  */
 132                 $filteredText = Sanitizer::decodeCharReferences( $text );
 133
 134                 $t =& new Title();
 135                 $t->mDbkeyform = str_replace( ' ', '_', $filteredText );
 136                 $t->mDefaultNamespace = $defaultNamespace;
 137
 138                 if( $t->secureAndSplit() ) {
 139                         if( $defaultNamespace == NS_MAIN ) {
 140                                 if( count( $wgTitleCache ) >= MW_TITLECACHE_MAX ) {
 141                                         # Avoid memory leaks on mass operations...
 142                                         $wgTitleCache = array();
 143                                 }
 144                                 $wgTitleCache[$text] =& $t;
 145                         }
 146                         wfProfileOut( $fname );
 147                         return $t;
 148                 } else {
 149                         wfProfileOut( $fname );
 150                         $ret = NULL;
 151                         return $ret;
 152                 }
 153         }
 154
 155         /**
 156          * Create a new Title from URL-encoded text. Ensures that
 157          * the given title's length does not exceed the maximum.
 158          * @param string $url the title, as might be taken from a URL
 159          * @return Title the new object, or NULL on an error
 160          * @static
 161          * @access public
 162          */
 163         function newFromURL( $url ) {
 164                 $t = new Title();
 165
 166                 # For compatibility with old buggy URLs. "+" is not valid in titles,
 167                 # but some URLs used it as a space replacement and they still come
 168                 # from some external search tools.
 169                 $s = str_replace( '+', ' ', $url );
 170
 171                 $t->mDbkeyform = str_replace( ' ', '_', $s );
 172                 if( $t->secureAndSplit() ) {
 173                         return $t;
 174                 } else {
 175                         return NULL;
 176                 }
 177         }
 178
 179         /**
 180          * Create a new Title from an article ID
 181          *
 182          * @todo This is inefficiently implemented, the page row is requested
 183          *       but not used for anything else
 184          *
 185          * @param int $id the page_id corresponding to the Title to create
 186          * @return Title the new object, or NULL on an error
 187          * @access public
 188          * @static
 189          */
 190         function newFromID( $id ) {
 191                 $fname = 'Title::newFromID';
 192                 $dbr =& wfGetDB( DB_SLAVE );
 193                 $row = $dbr->selectRow( 'page', array( 'page_namespace', 'page_title' ),
 194                         array( 'page_id' => $id ), $fname );
 195                 if ( $row !== false ) {
 196                         $title = Title::makeTitle( $row->page_namespace, $row->page_title );
 197                 } else {
 198                         $title = NULL;
 199                 }
 200                 return $title;
 201         }
 202
 203         /**
 204          * Create a new Title from a namespace index and a DB key.
 205          * It's assumed that $ns and $title are *valid*, for instance when
 206          * they came directly from the database or a special page name.
 207          * For convenience, spaces are converted to underscores so that
 208          * eg user_text fields can be used directly.
 209          *
 210          * @param int $ns the namespace of the article
 211          * @param string $title the unprefixed database key form
 212          * @return Title the new object
 213          * @static
 214          * @access public
 215          */
 216         function &makeTitle( $ns, $title ) {
 217                 $t =& new Title();
 218                 $t->mInterwiki = '';
 219                 $t->mFragment = '';
 220                 $t->mNamespace = intval( $ns );
 221                 $t->mDbkeyform = str_replace( ' ', '_', $title );
 222                 $t->mArticleID = ( $ns >= 0 ) ? -1 : 0;
 223                 $t->mUrlform = wfUrlencode( $t->mDbkeyform );
 224                 $t->mTextform = str_replace( '_', ' ', $title );
 225                 return $t;
 226         }
 227
 228         /**
 229          * Create a new Title frrom a namespace index and a DB key.
 230          * The parameters will be checked for validity, which is a bit slower
 231          * than makeTitle() but safer for user-provided data.
 232          *
 233          * @param int $ns the namespace of the article
 234          * @param string $title the database key form
 235          * @return Title the new object, or NULL on an error
 236          * @static
 237          * @access public
 238          */
 239         function makeTitleSafe( $ns, $title ) {
 240                 $t = new Title();
 241                 $t->mDbkeyform = Title::makeName( $ns, $title );
 242                 if( $t->secureAndSplit() ) {
 243                         return $t;
 244                 } else {
 245                         return NULL;
 246                 }
 247         }
 248
 249         /**
 250          * Create a new Title for the Main Page
 251          *
 252          * @static
 253          * @return Title the new object
 254          * @access public
 255          */
 256         function newMainPage() {
 257                 return Title::newFromText( wfMsgForContent( 'mainpage' ) );
 258         }
 259
 260         /**
 261          * Create a new Title for a redirect
 262          * @param string $text the redirect title text
 263          * @return Title the new object, or NULL if the text is not a
 264          *      valid redirect
 265          * @static
 266          * @access public
 267          */
 268         function newFromRedirect( $text ) {
 269                 global $wgMwRedir;
 270                 $rt = NULL;
 271                 if ( $wgMwRedir->matchStart( $text ) ) {
 272                         if ( preg_match( '/\[{2}(.*?)(?:\||\]{2})/', $text, $m ) ) {
 273                                 # categories are escaped using : for example one can enter:
 274                                 # #REDIRECT [[:Category:Music]]. Need to remove it.
 275                                 if ( substr($m[1],0,1) == ':') {
 276                                         # We don't want to keep the ':'
 277                                         $m[1] = substr( $m[1], 1 );
 278                                 }
 279
 280                                 $rt = Title::newFromText( $m[1] );
 281                                 # Disallow redirects to Special:Userlogout
 282                                 if ( !is_null($rt) && $rt->getNamespace() == NS_SPECIAL && preg_match( '/^Userlogout/i', $rt->getText() ) ) {
 283                                         $rt = NULL;
 284                                 }
 285                         }
 286                 }
 287                 return $rt;
 288         }
 289
 290 #----------------------------------------------------------------------------
 291 #       Static functions
 292 #----------------------------------------------------------------------------
 293
 294         /**
 295          * Get the prefixed DB key associated with an ID
 296          * @param int $id the page_id of the article
 297          * @return Title an object representing the article, or NULL
 298          *      if no such article was found
 299          * @static
 300          * @access public
 301          */
 302         function nameOf( $id ) {
 303                 $fname = 'Title::nameOf';
 304                 $dbr =& wfGetDB( DB_SLAVE );
 305
 306                 $s = $dbr->selectRow( 'page', array( 'page_namespace','page_title' ),  array( 'page_id' => $id ), $fname );
 307                 if ( $s === false ) { return NULL; }
 308
 309                 $n = Title::makeName( $s->page_namespace, $s->page_title );
 310                 return $n;
 311         }
 312
 313         /**
 314          * Get a regex character class describing the legal characters in a link
 315          * @return string the list of characters, not delimited
 316          * @static
 317          * @access public
 318          */
 319         function legalChars() {
 320                 global $wgLegalTitleChars;
 321                 return $wgLegalTitleChars;
 322         }
 323
 324         /**
 325          * Get a string representation of a title suitable for
 326          * including in a search index
 327          *
 328          * @param int $ns a namespace index
 329          * @param string $title text-form main part
 330          * @return string a stripped-down title string ready for the
 331          *      search index
 332          */
 333         /* static */ function indexTitle( $ns, $title ) {
 334                 global $wgContLang;
 335                 require_once( 'SearchEngine.php' );
 336
 337                 $lc = SearchEngine::legalSearchChars() . '&#;';
 338                 $t = $wgContLang->stripForSearch( $title );
 339                 $t = preg_replace( "/[^{$lc}]+/", ' ', $t );
 340                 $t = strtolower( $t );
 341
 342                 # Handle 's, s'
 343                 $t = preg_replace( "/([{$lc}]+)'s( |$)/", "\\1 \\1's ", $t );
 344                 $t = preg_replace( "/([{$lc}]+)s'( |$)/", "\\1s ", $t );
 345
 346                 $t = preg_replace( "/\\s+/", ' ', $t );
 347
 348                 if ( $ns == NS_IMAGE ) {
 349                         $t = preg_replace( "/ (png|gif|jpg|jpeg|ogg)$/", "", $t );
 350                 }
 351                 return trim( $t );
 352         }
 353
 354         /*
 355          * Make a prefixed DB key from a DB key and a namespace index
 356          * @param int $ns numerical representation of the namespace
 357          * @param string $title the DB key form the title
 358          * @return string the prefixed form of the title
 359          */
 360         /* static */ function makeName( $ns, $title ) {
 361                 global $wgContLang;
 362
 363                 $n = $wgContLang->getNsText( $ns );
 364                 return $n == '' ? $title : "$n:$title";
 365         }
 366
 367         /**
 368          * Returns the URL associated with an interwiki prefix
 369          * @param string $key the interwiki prefix (e.g. "MeatBall")
 370          * @return the associated URL, containing "$1", which should be
 371          *      replaced by an article title
 372          * @static (arguably)
 373          * @access public
 374          */
 375         function getInterwikiLink( $key )  {
 376                 global $wgMemc, $wgDBname, $wgInterwikiExpiry, $wgTitleInterwikiCache;
 377                 $fname = 'Title::getInterwikiLink';
 378
 379                 wfProfileIn( $fname );
 380
 381                 $key = strtolower( $key );
 382
 383                 $k = $wgDBname.':interwiki:'.$key;
 384                 if( array_key_exists( $k, $wgTitleInterwikiCache ) ) {
 385                         wfProfileOut( $fname );
 386                         return $wgTitleInterwikiCache[$k]->iw_url;
 387                 }
 388
 389                 $s = $wgMemc->get( $k );
 390                 # Ignore old keys with no iw_local
 391                 if( $s && isset( $s->iw_local ) && isset($s->iw_trans)) {
 392                         $wgTitleInterwikiCache[$k] = $s;
 393                         wfProfileOut( $fname );
 394                         return $s->iw_url;
 395                 }
 396
 397                 $dbr =& wfGetDB( DB_SLAVE );
 398                 $res = $dbr->select( 'interwiki',
 399                         array( 'iw_url', 'iw_local', 'iw_trans' ),
 400                         array( 'iw_prefix' => $key ), $fname );
 401                 if( !$res ) {
 402                         wfProfileOut( $fname );
 403                         return '';
 404                 }
 405
 406                 $s = $dbr->fetchObject( $res );
 407                 if( !$s ) {
 408                         # Cache non-existence: create a blank object and save it to memcached
 409                         $s = (object)false;
 410                         $s->iw_url = '';
 411                         $s->iw_local = 0;
 412                         $s->iw_trans = 0;
 413                 }
 414                 $wgMemc->set( $k, $s, $wgInterwikiExpiry );
 415                 $wgTitleInterwikiCache[$k] = $s;
 416
 417                 wfProfileOut( $fname );
 418                 return $s->iw_url;
 419         }
 420
 421         /**
 422          * Determine whether the object refers to a page within
 423          * this project.
 424          *
 425          * @return bool TRUE if this is an in-project interwiki link
 426          *      or a wikilink, FALSE otherwise
 427          * @access public
 428          */
 429         function isLocal() {
 430                 global $wgTitleInterwikiCache, $wgDBname;
 431
 432                 if ( $this->mInterwiki != '' ) {
 433                         # Make sure key is loaded into cache
 434                         $this->getInterwikiLink( $this->mInterwiki );
 435                         $k = $wgDBname.':interwiki:' . $this->mInterwiki;
 436                         return (bool)($wgTitleInterwikiCache[$k]->iw_local);
 437                 } else {
 438                         return true;
 439                 }
 440         }
 441
 442         /**
 443          * Determine whether the object refers to a page within
 444          * this project and is transcludable.
 445          *
 446          * @return bool TRUE if this is transcludable
 447          * @access public
 448          */
 449         function isTrans() {
 450                 global $wgTitleInterwikiCache, $wgDBname;
 451
 452                 if ($this->mInterwiki == '' || !$this->isLocal())
 453                         return false;
 454                 # Make sure key is loaded into cache
 455                 $this->getInterwikiLink( $this->mInterwiki );
 456                 $k = $wgDBname.':interwiki:' . $this->mInterwiki;
 457                 return (bool)($wgTitleInterwikiCache[$k]->iw_trans);
 458         }
 459
 460         /**
 461          * Update the page_touched field for an array of title objects
 462          * @todo Inefficient unless the IDs are already loaded into the
 463          *      link cache
 464          * @param array $titles an array of Title objects to be touched
 465          * @param string $timestamp the timestamp to use instead of the
 466          *      default current time
 467          * @static
 468          * @access public
 469          */
 470         function touchArray( $titles, $timestamp = '' ) {
 471
 472                 if ( count( $titles ) == 0 ) {
 473                         return;
 474                 }
 475                 $dbw =& wfGetDB( DB_MASTER );
 476                 if ( $timestamp == '' ) {
 477                         $timestamp = $dbw->timestamp();
 478                 }
 479                 /*
 480                 $page = $dbw->tableName( 'page' );
 481                 $sql = "UPDATE $page SET page_touched='{$timestamp}' WHERE page_id IN (";
 482                 $first = true;
 483
 484                 foreach ( $titles as $title ) {
 485                         if ( $wgUseFileCache ) {
 486                                 $cm = new CacheManager($title);
 487                                 @unlink($cm->fileCacheName());
 488                         }
 489
 490                         if ( ! $first ) {
 491                                 $sql .= ',';
 492                         }
 493                         $first = false;
 494                         $sql .= $title->getArticleID();
 495                 }
 496                 $sql .= ')';
 497                 if ( ! $first ) {
 498                         $dbw->query( $sql, 'Title::touchArray' );
 499                 }
 500                 */
 501                 // hack hack hack -- brion 2005-07-11. this was unfriendly to db.
 502                 // do them in small chunks:
 503                 $fname = 'Title::touchArray';
 504                 foreach( $titles as $title ) {
 505                         $dbw->update( 'page',
 506                                 array( 'page_touched' => $timestamp ),
 507                                 array(
 508                                         'page_namespace' => $title->getNamespace(),
 509                                         'page_title'     => $title->getDBkey() ),
 510                                 $fname );
 511                 }
 512         }
 513
 514 #----------------------------------------------------------------------------
 515 #       Other stuff
 516 #----------------------------------------------------------------------------
 517
 518         /** Simple accessors */
 519         /**
 520          * Get the text form (spaces not underscores) of the main part
 521          * @return string
 522          * @access public
 523          */
 524         function getText() { return $this->mTextform; }
 525         /**
 526          * Get the URL-encoded form of the main part
 527          * @return string
 528          * @access public
 529          */
 530         function getPartialURL() { return $this->mUrlform; }
 531         /**
 532          * Get the main part with underscores
 533          * @return string
 534          * @access public
 535          */
 536         function getDBkey() { return $this->mDbkeyform; }
 537         /**
 538          * Get the namespace index, i.e. one of the NS_xxxx constants
 539          * @return int
 540          * @access public
 541          */
 542         function getNamespace() { return $this->mNamespace; }
 543         /**
 544          * Get the namespace text
 545          * @return string
 546          * @access public
 547          */
 548         function getNsText() {
 549                 global $wgContLang;
 550                 return $wgContLang->getNsText( $this->mNamespace );
 551         }
 552         /**
 553          * Get the namespace text of the subject (rather than talk) page
 554          * @return string
 555          * @access public
 556          */
 557         function getSubjectNsText() {
 558                 global $wgContLang;
 559                 return $wgContLang->getNsText( Namespace::getSubject( $this->mNamespace ) );
 560         }
 561
 562         /**
 563          * Get the interwiki prefix (or null string)
 564          * @return string
 565          * @access public
 566          */
 567         function getInterwiki() { return $this->mInterwiki; }
 568         /**
 569          * Get the Title fragment (i.e. the bit after the #)
 570          * @return string
 571          * @access public
 572          */
 573         function getFragment() { return $this->mFragment; }
 574         /**
 575          * Get the default namespace index, for when there is no namespace
 576          * @return int
 577          * @access public
 578          */
 579         function getDefaultNamespace() { return $this->mDefaultNamespace; }
 580
 581         /**
 582          * Get title for search index
 583          * @return string a stripped-down title string ready for the
 584          *      search index
 585          */
 586         function getIndexTitle() {
 587                 return Title::indexTitle( $this->mNamespace, $this->mTextform );
 588         }
 589
 590         /**
 591          * Get the prefixed database key form
 592          * @return string the prefixed title, with underscores and
 593          *      any interwiki and namespace prefixes
 594          * @access public
 595          */
 596         function getPrefixedDBkey() {
 597                 $s = $this->prefix( $this->mDbkeyform );
 598                 $s = str_replace( ' ', '_', $s );
 599                 return $s;
 600         }
 601
 602         /**
 603          * Get the prefixed title with spaces.
 604          * This is the form usually used for display
 605          * @return string the prefixed title, with spaces
 606          * @access public
 607          */
 608         function getPrefixedText() {
 609                 global $wgContLang;
 610                 if ( empty( $this->mPrefixedText ) ) { // FIXME: bad usage of empty() ?
 611                         $s = $this->prefix( $this->mTextform );
 612                         $s = str_replace( '_', ' ', $s );
 613                         $this->mPrefixedText = $s;
 614                 }
 615                 return $this->mPrefixedText;
 616         }
 617
 618         /**
 619          * Get the prefixed title with spaces, plus any fragment
 620          * (part beginning with '#')
 621          * @return string the prefixed title, with spaces and
 622          *      the fragment, including '#'
 623          * @access public
 624          */
 625         function getFullText() {
 626                 global $wgContLang;
 627                 $text = $this->getPrefixedText();
 628                 if( '' != $this->mFragment ) {
 629                         $text .= '#' . $this->mFragment;
 630                 }
 631                 return $text;
 632         }
 633
 634         /**
 635          * Get a URL-encoded title (not an actual URL) including interwiki
 636          * @return string the URL-encoded form
 637          * @access public
 638          */
 639         function getPrefixedURL() {
 640                 $s = $this->prefix( $this->mDbkeyform );
 641                 $s = str_replace( ' ', '_', $s );
 642
 643                 $s = wfUrlencode ( $s ) ;
 644
 645                 # Cleaning up URL to make it look nice -- is this safe?
 646                 $s = str_replace( '%28', '(', $s );
 647                 $s = str_replace( '%29', ')', $s );
 648
 649                 return $s;
 650         }
 651
 652         /**
 653          * Get a real URL referring to this title, with interwiki link and
 654          * fragment
 655          *
 656          * @param string $query an optional query string, not used
 657          *      for interwiki links
 658          * @return string the URL
 659          * @access public
 660          */
 661         function getFullURL( $query = '' ) {
 662                 global $wgContLang, $wgServer;
 663
 664                 if ( '' == $this->mInterwiki ) {
 665                         $url = $wgServer . $this->getLocalUrl( $query );
 666                 } else {
 667                         $baseUrl = $this->getInterwikiLink( $this->mInterwiki );
 668
 669                         $namespace = $wgContLang->getNsText( $this->mNamespace );
 670                         if ( '' != $namespace ) {
 671                                 # Can this actually happen? Interwikis shouldn't be parsed.
 672                                 $namespace .= ':';
 673                         }
 674                         $url = str_replace( '$1', $namespace . $this->mUrlform, $baseUrl );
 675                         if( $query != '' ) {
 676                                 if( false === strpos( $url, '?' ) ) {
 677                                         $url .= '?';
 678                                 } else {
 679                                         $url .= '&';
 680                                 }
 681                                 $url .= $query;
 682                         }
 683                         if ( '' != $this->mFragment ) {
 684                                 $url .= '#' . $this->mFragment;
 685                         }
 686                 }
 687                 wfRunHooks( 'GetFullURL', array( &$this, &$url, $query ) );
 688                 return $url;
 689         }
 690
 691         /**
 692          * Get a URL with no fragment or server name.  If this page is generated
 693          * with action=render, $wgServer is prepended.
 694          * @param string $query an optional query string; if not specified,
 695          *      $wgArticlePath will be used.
 696          * @return string the URL
 697          * @access public
 698          */
 699         function getLocalURL( $query = '' ) {
 700                 global $wgArticlePath, $wgScript, $wgServer, $wgRequest;
 701
 702                 if ( $this->isExternal() ) {
 703                         $url = $this->getFullURL();
 704                 } else {
 705                         $dbkey = wfUrlencode( $this->getPrefixedDBkey() );
 706                         if ( $query == '' ) {
 707                                 $url = str_replace( '$1', $dbkey, $wgArticlePath );
 708                         } else {
 709                                 global $wgActionPaths;
 710                                 $url = false;
 711                                 if( !empty( $wgActionPaths ) &&
 712                                         preg_match( '/^(.*&|)action=([^&]*)(&(.*)|)$/', $query, $matches ) )
 713                                 {
 714                                         $action = urldecode( $matches[2] );
 715                                         if( isset( $wgActionPaths[$action] ) ) {
 716                                                 $query = $matches[1];
 717                                                 if( isset( $matches[4] ) ) $query .= $matches[4];
 718                                                 $url = str_replace( '$1', $dbkey, $wgActionPaths[$action] );
 719                                                 if( $query != '' ) $url .= '?' . $query;
 720                                         }
 721                                 }
 722                                 if ( $url === false ) {
 723                                         if ( $query == '-' ) {
 724                                                 $query = '';
 725                                         }
 726                                         $url = "{$wgScript}?title={$dbkey}&{$query}";
 727                                 }
 728                         }
 729
 730                         if ($wgRequest->getText('action') == 'render') {
 731                                 $url = $wgServer . $url;
 732                         }
 733                 }
 734                 wfRunHooks( 'GetLocalURL', array( &$this, &$url, $query ) );
 735                 return $url;
 736         }
 737
 738         /**
 739          * Get an HTML-escaped version of the URL form, suitable for
 740          * using in a link, without a server name or fragment
 741          * @param string $query an optional query string
 742          * @return string the URL
 743          * @access public
 744          */
 745         function escapeLocalURL( $query = '' ) {
 746                 return htmlspecialchars( $this->getLocalURL( $query ) );
 747         }
 748
 749         /**
 750          * Get an HTML-escaped version of the URL form, suitable for
 751          * using in a link, including the server name and fragment
 752          *
 753          * @return string the URL
 754          * @param string $query an optional query string
 755          * @access public
 756          */
 757         function escapeFullURL( $query = '' ) {
 758                 return htmlspecialchars( $this->getFullURL( $query ) );
 759         }
 760
 761         /**
 762          * Get the URL form for an internal link.
 763          * - Used in various Squid-related code, in case we have a different
 764          * internal hostname for the server from the exposed one.
 765          *
 766          * @param string $query an optional query string
 767          * @return string the URL
 768          * @access public
 769          */
 770         function getInternalURL( $query = '' ) {
 771                 global $wgInternalServer;
 772                 return $wgInternalServer . $this->getLocalURL( $query );
 773         }
 774
 775         /**
 776          * Get the edit URL for this Title
 777          * @return string the URL, or a null string if this is an
 778          *      interwiki link
 779          * @access public
 780          */
 781         function getEditURL() {
 782                 global $wgServer, $wgScript;
 783
 784                 if ( '' != $this->mInterwiki ) { return ''; }
 785                 $s = $this->getLocalURL( 'action=edit' );
 786
 787                 return $s;
 788         }
 789
 790         /**
 791          * Get the HTML-escaped displayable text form.
 792          * Used for the title field in <a> tags.
 793          * @return string the text, including any prefixes
 794          * @access public
 795          */
 796         function getEscapedText() {
 797                 return htmlspecialchars( $this->getPrefixedText() );
 798         }
 799
 800         /**
 801          * Is this Title interwiki?
 802          * @return boolean
 803          * @access public
 804          */
 805         function isExternal() { return ( '' != $this->mInterwiki ); }
 806
 807         /**
 808          * Does the title correspond to a protected article?
 809          * @param string $what the action the page is protected from,
 810          *      by default checks move and edit
 811          * @return boolean
 812          * @access public
 813          */
 814         function isProtected($action = '') {
 815                 if ( -1 == $this->mNamespace ) { return true; }
 816                 if($action == 'edit' || $action == '') {
 817                         $a = $this->getRestrictions("edit");
 818                         if ( in_array( 'sysop', $a ) ) { return true; }
 819                 }
 820                 if($action == 'move' || $action == '') {
 821                         $a = $this->getRestrictions("move");
 822                         if ( in_array( 'sysop', $a ) ) { return true; }
 823                 }
 824                 return false;
 825         }
 826
 827         /**
 828          * Is $wgUser is watching this page?
 829          * @return boolean
 830          * @access public
 831          */
 832         function userIsWatching() {
 833                 global $wgUser;
 834
 835                 if ( is_null( $this->mWatched ) ) {
 836                         if ( -1 == $this->mNamespace || 0 == $wgUser->getID()) {
 837                                 $this->mWatched = false;
 838                         } else {
 839                                 $this->mWatched = $wgUser->isWatched( $this );
 840                         }
 841                 }
 842                 return $this->mWatched;
 843         }
 844
 845         /**
 846          * Can $wgUser perform $action this page?
 847          * @param string $action action that permission needs to be checked for
 848          * @return boolean
 849          * @access private
 850          */
 851         function userCan($action) {
 852                 $fname = 'Title::userCan';
 853                 wfProfileIn( $fname );
 854
 855                 global $wgUser;
 856                 if( NS_SPECIAL == $this->mNamespace ) {
 857                         wfProfileOut( $fname );
 858                         return false;
 859                 }
 860                 // XXX: This is the code that prevents unprotecting a page in NS_MEDIAWIKI
 861                 // from taking effect -ævar
 862                 if( NS_MEDIAWIKI == $this->mNamespace &&
 863                     !$wgUser->isAllowed('editinterface') ) {
 864                         wfProfileOut( $fname );
 865                         return false;
 866                 }
 867
 868                 if( $this->mDbkeyform == '_' ) {
 869                         # FIXME: Is this necessary? Shouldn't be allowed anyway...
 870                         wfProfileOut( $fname );
 871                         return false;
 872                 }
 873
 874                 # protect global styles and js
 875                 if ( NS_MEDIAWIKI == $this->mNamespace
 876                  && preg_match("/\\.(css|js)$/", $this->mTextform )
 877                      && !$wgUser->isAllowed('editinterface') ) {
 878                         wfProfileOut( $fname );
 879                         return false;
 880                 }
 881
 882                 # protect css/js subpages of user pages
 883                 # XXX: this might be better using restrictions
 884                 # XXX: Find a way to work around the php bug that prevents using $this->userCanEditCssJsSubpage() from working
 885                 if( NS_USER == $this->mNamespace
 886                         && preg_match("/\\.(css|js)$/", $this->mTextform )
 887                         && !$wgUser->isAllowed('editinterface')
 888                         && !preg_match('/^'.preg_quote($wgUser->getName(), '/').'\//', $this->mTextform) ) {
 889                         wfProfileOut( $fname );
 890                         return false;
 891                 }
 892
 893                 foreach( $this->getRestrictions($action) as $right ) {
 894                         // Backwards compatibility, rewrite sysop -> protect
 895                         if ( $right == 'sysop' ) {
 896                                 $right = 'protect';
 897                         }
 898                         if( '' != $right && !$wgUser->isAllowed( $right ) ) {
 899                                 wfProfileOut( $fname );
 900                                 return false;
 901                         }
 902                 }
 903
 904                 if( $action == 'move' &&
 905                         !( $this->isMovable() && $wgUser->isAllowed( 'move' ) ) ) {
 906                         wfProfileOut( $fname );
 907                         return false;
 908                 }
 909
 910                 if( $action == 'create' ) {
 911                         if( (  $this->isTalkPage() && !$wgUser->isAllowed( 'createtalk' ) ) ||
 912                                 ( !$this->isTalkPage() && !$wgUser->isAllowed( 'createpage' ) ) ) {
 913                                 return false;
 914                         }
 915                 }
 916
 917                 wfProfileOut( $fname );
 918                 return true;
 919         }
 920
 921         /**
 922          * Can $wgUser edit this page?
 923          * @return boolean
 924          * @access public
 925          */
 926         function userCanEdit() {
 927                 return $this->userCan('edit');
 928         }
 929
 930         /**
 931          * Can $wgUser move this page?
 932          * @return boolean
 933          * @access public
 934          */
 935         function userCanMove() {
 936                 return $this->userCan('move');
 937         }
 938
 939         /**
 940          * Would anybody with sufficient privileges be able to move this page?
 941          * Some pages just aren't movable.
 942          *
 943          * @return boolean
 944          * @access public
 945          */
 946         function isMovable() {
 947                 return Namespace::isMovable( $this->getNamespace() )
 948                         && $this->getInterwiki() == '';
 949         }
 950
 951         /**
 952          * Can $wgUser read this page?
 953          * @return boolean
 954          * @access public
 955          */
 956         function userCanRead() {
 957                 global $wgUser;
 958
 959                 if( $wgUser->isAllowed('read') ) {
 960                         return true;
 961                 } else {
 962                         global $wgWhitelistRead;
 963
 964                         /** If anon users can create an account,
 965                             they need to reach the login page first! */
 966                         if( $wgUser->isAllowed( 'createaccount' )
 967                             && $this->getNamespace() == NS_SPECIAL
 968                             && $this->getText() == 'Userlogin' ) {
 969                                 return true;
 970                         }
 971
 972                         /** some pages are explicitly allowed */
 973                         $name = $this->getPrefixedText();
 974                         if( $wgWhitelistRead && in_array( $name, $wgWhitelistRead ) ) {
 975                                 return true;
 976                         }
 977
 978                         # Compatibility with old settings
 979                         if( $wgWhitelistRead && $this->getNamespace() == NS_MAIN ) {
 980                                 if( in_array( ':' . $name, $wgWhitelistRead ) ) {
 981                                         return true;
 982                                 }
 983                         }
 984                 }
 985                 return false;
 986         }
 987
 988         /**
 989          * Is this a talk page of some sort?
 990          * @return bool
 991          * @access public
 992          */
 993         function isTalkPage() {
 994                 return Namespace::isTalk( $this->getNamespace() );
 995         }
 996
 997         /**
 998          * Is this a .css or .js subpage of a user page?
 999          * @return bool
1000          * @access public
1001          */
1002         function isCssJsSubpage() {
1003                 return ( NS_USER == $this->mNamespace and preg_match("/\\.(css|js)$/", $this->mTextform ) );
1004         }
1005         /**
1006          * Is this a .css subpage of a user page?
1007          * @return bool
1008          * @access public
1009          */
1010         function isCssSubpage() {
1011                 return ( NS_USER == $this->mNamespace and preg_match("/\\.css$/", $this->mTextform ) );
1012         }
1013         /**
1014          * Is this a .js subpage of a user page?
1015          * @return bool
1016          * @access public
1017          */
1018         function isJsSubpage() {
1019                 return ( NS_USER == $this->mNamespace and preg_match("/\\.js$/", $this->mTextform ) );
1020         }
1021         /**
1022          * Protect css/js subpages of user pages: can $wgUser edit
1023          * this page?
1024          *
1025          * @return boolean
1026          * @todo XXX: this might be better using restrictions
1027          * @access public
1028          */
1029         function userCanEditCssJsSubpage() {
1030                 global $wgUser;
1031                 return ( $wgUser->isAllowed('editinterface') or preg_match('/^'.preg_quote($wgUser->getName(), '/').'\//', $this->mTextform) );
1032         }
1033
1034         /**
1035          * Loads a string into mRestrictions array
1036          * @param string $res restrictions in string format
1037          * @access public
1038          */
1039         function loadRestrictions( $res ) {
1040                 foreach( explode( ':', trim( $res ) ) as $restrict ) {
1041                         $temp = explode( '=', trim( $restrict ) );
1042                         if(count($temp) == 1) {
1043                                 // old format should be treated as edit/move restriction
1044                                 $this->mRestrictions["edit"] = explode( ',', trim( $temp[0] ) );
1045                                 $this->mRestrictions["move"] = explode( ',', trim( $temp[0] ) );
1046                         } else {
1047                                 $this->mRestrictions[$temp[0]] = explode( ',', trim( $temp[1] ) );
1048                         }
1049                 }
1050                 $this->mRestrictionsLoaded = true;
1051         }
1052
1053         /**
1054          * Accessor/initialisation for mRestrictions
1055          * @param string $action action that permission needs to be checked for
1056          * @return array the array of groups allowed to edit this article
1057          * @access public
1058          */
1059         function getRestrictions($action) {
1060                 $id = $this->getArticleID();
1061                 if ( 0 == $id ) { return array(); }
1062
1063                 if ( ! $this->mRestrictionsLoaded ) {
1064                         $dbr =& wfGetDB( DB_SLAVE );
1065                         $res = $dbr->selectField( 'page', 'page_restrictions', 'page_id='.$id );
1066                         $this->loadRestrictions( $res );
1067                 }
1068                 if( isset( $this->mRestrictions[$action] ) ) {
1069                         return $this->mRestrictions[$action];
1070                 }
1071                 return array();
1072         }
1073
1074         /**
1075          * Is there a version of this page in the deletion archive?
1076          * @return int the number of archived revisions
1077          * @access public
1078          */
1079         function isDeleted() {
1080                 $fname = 'Title::isDeleted';
1081                 if ( $this->getNamespace() < 0 ) {
1082                         $n = 0;
1083                 } else {
1084                         $dbr =& wfGetDB( DB_SLAVE );
1085                         $n = $dbr->selectField( 'archive', 'COUNT(*)', array( 'ar_namespace' => $this->getNamespace(),
1086                                 'ar_title' => $this->getDBkey() ), $fname );
1087                 }
1088                 return (int)$n;
1089         }
1090
1091         /**
1092          * Get the article ID for this Title from the link cache,
1093          * adding it if necessary
1094          * @param int $flags a bit field; may be GAID_FOR_UPDATE to select
1095          *      for update
1096          * @return int the ID
1097          * @access public
1098          */
1099         function getArticleID( $flags = 0 ) {
1100                 global $wgLinkCache;
1101                 if ( $flags & GAID_FOR_UPDATE ) {
1102                         $oldUpdate = $wgLinkCache->forUpdate( true );
1103                         $this->mArticleID = $wgLinkCache->addLinkObj( $this );
1104                         $wgLinkCache->forUpdate( $oldUpdate );
1105                 } else {
1106                         if ( -1 == $this->mArticleID ) {
1107                                 $this->mArticleID = $wgLinkCache->addLinkObj( $this );
1108                         }
1109                 }
1110                 return $this->mArticleID;
1111         }
1112
1113         function getLatestRevID() {
1114                 if ($this->mLatestID !== false)
1115                         return $this->mLatestID;
1116
1117                 $db =& wfGetDB(DB_SLAVE);
1118                 return $this->mLatestID = $db->selectField( 'revision',
1119                         "max(rev_id)",
1120                         array('rev_page' => $this->getArticleID()),
1121                         'Title::getLatestRevID' );
1122         }
1123
1124         /**
1125          * This clears some fields in this object, and clears any associated
1126          * keys in the "bad links" section of $wgLinkCache.
1127          *
1128          * - This is called from Article::insertNewArticle() to allow
1129          * loading of the new page_id. It's also called from
1130          * Article::doDeleteArticle()
1131          *
1132          * @param int $newid the new Article ID
1133          * @access public
1134          */
1135         function resetArticleID( $newid ) {
1136                 global $wgLinkCache;
1137                 $wgLinkCache->clearBadLink( $this->getPrefixedDBkey() );
1138
1139                 if ( 0 == $newid ) { $this->mArticleID = -1; }
1140                 else { $this->mArticleID = $newid; }
1141                 $this->mRestrictionsLoaded = false;
1142                 $this->mRestrictions = array();
1143         }
1144
1145         /**
1146          * Updates page_touched for this page; called from LinksUpdate.php
1147          * @return bool true if the update succeded
1148          * @access public
1149          */
1150         function invalidateCache() {
1151                 global $wgUseFileCache;
1152
1153                 if ( wfReadOnly() ) {
1154                         return;
1155                 }
1156
1157                 $dbw =& wfGetDB( DB_MASTER );
1158                 $success = $dbw->update( 'page',
1159                         array( /* SET */
1160                                 'page_touched' => $dbw->timestamp()
1161                         ), array( /* WHERE */
1162                                 'page_namespace' => $this->getNamespace() ,
1163                                 'page_title' => $this->getDBkey()
1164                         ), 'Title::invalidateCache'
1165                 );
1166
1167                 if ($wgUseFileCache) {
1168                         $cache = new CacheManager($this);
1169                         @unlink($cache->fileCacheName());
1170                 }
1171
1172                 return $success;
1173         }
1174
1175         /**
1176          * Prefix some arbitrary text with the namespace or interwiki prefix
1177          * of this object
1178          *
1179          * @param string $name the text
1180          * @return string the prefixed text
1181          * @access private
1182          */
1183         /* private */ function prefix( $name ) {
1184                 global $wgContLang;
1185
1186                 $p = '';
1187                 if ( '' != $this->mInterwiki ) {
1188                         $p = $this->mInterwiki . ':';
1189                 }
1190                 if ( 0 != $this->mNamespace ) {
1191                         $p .= $wgContLang->getNsText( $this->mNamespace ) . ':';
1192                 }
1193                 return $p . $name;
1194         }
1195
1196         /**
1197          * Secure and split - main initialisation function for this object
1198          *
1199          * Assumes that mDbkeyform has been set, and is urldecoded
1200          * and uses underscores, but not otherwise munged.  This function
1201          * removes illegal characters, splits off the interwiki and
1202          * namespace prefixes, sets the other forms, and canonicalizes
1203          * everything.
1204          * @return bool true on success
1205          * @access private
1206          */
1207         /* private */ function secureAndSplit() {
1208                 global $wgContLang, $wgLocalInterwiki, $wgCapitalLinks;
1209                 $fname = 'Title::secureAndSplit';
1210                 wfProfileIn( $fname );
1211
1212                 # Initialisation
1213                 static $rxTc = false;
1214                 if( !$rxTc ) {
1215                         # % is needed as well
1216                         $rxTc = '/[^' . Title::legalChars() . ']|%[0-9A-Fa-f]{2}/S';
1217                 }
1218
1219                 $this->mInterwiki = $this->mFragment = '';
1220                 $this->mNamespace = $this->mDefaultNamespace; # Usually NS_MAIN
1221
1222                 # Clean up whitespace
1223                 #
1224                 $t = preg_replace( '/[ _]+/', '_', $this->mDbkeyform );
1225                 $t = trim( $t, '_' );
1226
1227                 if ( '' == $t ) {
1228                         wfProfileOut( $fname );
1229                         return false;
1230                 }
1231
1232                 if( false !== strpos( $t, UTF8_REPLACEMENT ) ) {
1233                         # Contained illegal UTF-8 sequences or forbidden Unicode chars.
1234                         wfProfileOut( $fname );
1235                         return false;
1236                 }
1237
1238                 $this->mDbkeyform = $t;
1239
1240                 # Initial colon indicates main namespace rather than specified default
1241                 # but should not create invalid {ns,title} pairs such as {0,Project:Foo}
1242                 if ( ':' == $t{0} ) {
1243                         $this->mNamespace = NS_MAIN;
1244                         $t = substr( $t, 1 ); # remove the colon but continue processing
1245                 }
1246
1247                 # Namespace or interwiki prefix
1248                 $firstPass = true;
1249                 do {
1250                         if ( preg_match( "/^(.+?)_*:_*(.*)$/S", $t, $m ) ) {
1251                                 $p = $m[1];
1252                                 $lowerNs = strtolower( $p );
1253                                 if ( $ns = Namespace::getCanonicalIndex( $lowerNs ) ) {
1254                                         # Canonical namespace
1255                                         $t = $m[2];
1256                                         $this->mNamespace = $ns;
1257                                 } elseif ( $ns = $wgContLang->getNsIndex( $lowerNs )) {
1258                                         # Ordinary namespace
1259                                         $t = $m[2];
1260                                         $this->mNamespace = $ns;
1261                                 } elseif( $this->getInterwikiLink( $p ) ) {
1262                                         if( !$firstPass ) {
1263                                                 # Can't make a local interwiki link to an interwiki link.
1264                                                 # That's just crazy!
1265                                                 wfProfileOut( $fname );
1266                                                 return false;
1267                                         }
1268
1269                                         # Interwiki link
1270                                         $t = $m[2];
1271                                         $this->mInterwiki = strtolower( $p );
1272
1273                                         # Redundant interwiki prefix to the local wiki
1274                                         if ( 0 == strcasecmp( $this->mInterwiki, $wgLocalInterwiki ) ) {
1275                                                 if( $t == '' ) {
1276                                                         # Can't have an empty self-link
1277                                                         wfProfileOut( $fname );
1278                                                         return false;
1279                                                 }
1280                                                 $this->mInterwiki = '';
1281                                                 $firstPass = false;
1282                                                 # Do another namespace split...
1283                                                 continue;
1284                                         }
1285                                 }
1286                                 # If there's no recognized interwiki or namespace,
1287                                 # then let the colon expression be part of the title.
1288                         }
1289                         break;
1290                 } while( true );
1291                 $r = $t;
1292
1293                 # We already know that some pages won't be in the database!
1294                 #
1295                 if ( '' != $this->mInterwiki || -1 == $this->mNamespace ) {
1296                         $this->mArticleID = 0;
1297                 }
1298                 $f = strstr( $r, '#' );
1299                 if ( false !== $f ) {
1300                         $this->mFragment = substr( $f, 1 );
1301                         $r = substr( $r, 0, strlen( $r ) - strlen( $f ) );
1302                         # remove whitespace again: prevents "Foo_bar_#"
1303                         # becoming "Foo_bar_"
1304                         $r = preg_replace( '/_*$/', '', $r );
1305                 }
1306
1307                 # Reject illegal characters.
1308                 #
1309                 if( preg_match( $rxTc, $r ) ) {
1310                         wfProfileOut( $fname );
1311                         return false;
1312                 }
1313
1314                 /**
1315                  * Pages with "/./" or "/../" appearing in the URLs will
1316                  * often be unreachable due to the way web browsers deal
1317                  * with 'relative' URLs. Forbid them explicitly.
1318                  */
1319                 if ( strpos( $r, '.' ) !== false &&
1320                      ( $r === '.' || $r === '..' ||
1321                        strpos( $r, './' ) === 0  ||
1322                        strpos( $r, '../' ) === 0 ||
1323                        strpos( $r, '/./' ) !== false ||
1324                        strpos( $r, '/../' ) !== false ) )
1325                 {
1326                         wfProfileOut( $fname );
1327                         return false;
1328                 }
1329
1330                 # We shouldn't need to query the DB for the size.
1331                 #$maxSize = $dbr->textFieldSize( 'page', 'page_title' );
1332                 if ( strlen( $r ) > 255 ) {
1333                         wfProfileOut( $fname );
1334                         return false;
1335                 }
1336
1337                 /**
1338                  * Normally, all wiki links are forced to have
1339                  * an initial capital letter so [[foo]] and [[Foo]]
1340                  * point to the same place.
1341                  *
1342                  * Don't force it for interwikis, since the other
1343                  * site might be case-sensitive.
1344                  */
1345                 if( $wgCapitalLinks && $this->mInterwiki == '') {
1346                         $t = $wgContLang->ucfirst( $r );
1347                 } else {
1348                         $t = $r;
1349                 }
1350
1351                 /**
1352                  * Can't make a link to a namespace alone...
1353                  * "empty" local links can only be self-links
1354                  * with a fragment identifier.
1355                  */
1356                 if( $t == '' &&
1357                         $this->mInterwiki == '' &&
1358                         $this->mNamespace != NS_MAIN ) {
1359                         wfProfileOut( $fname );
1360                         return false;
1361                 }
1362
1363                 # Fill fields
1364                 $this->mDbkeyform = $t;
1365                 $this->mUrlform = wfUrlencode( $t );
1366
1367                 $this->mTextform = str_replace( '_', ' ', $t );
1368
1369                 wfProfileOut( $fname );
1370                 return true;
1371         }
1372
1373         /**
1374          * Get a Title object associated with the talk page of this article
1375          * @return Title the object for the talk page
1376          * @access public
1377          */
1378         function getTalkPage() {
1379                 return Title::makeTitle( Namespace::getTalk( $this->getNamespace() ), $this->getDBkey() );
1380         }
1381
1382         /**
1383          * Get a title object associated with the subject page of this
1384          * talk page
1385          *
1386          * @return Title the object for the subject page
1387          * @access public
1388          */
1389         function getSubjectPage() {
1390                 return Title::makeTitle( Namespace::getSubject( $this->getNamespace() ), $this->getDBkey() );
1391         }
1392
1393         /**
1394          * Get an array of Title objects linking to this Title
1395          * Also stores the IDs in the link cache.
1396          *
1397          * @param string $options may be FOR UPDATE
1398          * @return array the Title objects linking here
1399          * @access public
1400          */
1401         function getLinksTo( $options = '' ) {
1402                 global $wgLinkCache;
1403                 $id = $this->getArticleID();
1404
1405                 if ( $options ) {
1406                         $db =& wfGetDB( DB_MASTER );
1407                 } else {
1408                         $db =& wfGetDB( DB_SLAVE );
1409                 }
1410
1411                 $res = $db->select( array( 'page', 'pagelinks' ),
1412                         array( 'page_namespace', 'page_title', 'page_id' ),
1413                         array(
1414                                 'pl_from=page_id',
1415                                 'pl_namespace' => $this->getNamespace(),
1416                                 'pl_title'     => $this->getDbKey() ),
1417                         'Title::getLinksTo',
1418                         $options );
1419
1420                 $retVal = array();
1421                 if ( $db->numRows( $res ) ) {
1422                         while ( $row = $db->fetchObject( $res ) ) {
1423                                 if ( $titleObj = Title::makeTitle( $row->page_namespace, $row->page_title ) ) {
1424                                         $wgLinkCache->addGoodLinkObj( $row->page_id, $titleObj );
1425                                         $retVal[] = $titleObj;
1426                                 }
1427                         }
1428                 }
1429                 $db->freeResult( $res );
1430                 return $retVal;
1431         }
1432
1433         /**
1434          * Get an array of Title objects referring to non-existent articles linked from this page
1435          *
1436          * @param string $options may be FOR UPDATE
1437          * @return array the Title objects
1438          * @access public
1439          */
1440         function getBrokenLinksFrom( $options = '' ) {
1441                 global $wgLinkCache;
1442
1443                 if ( $options ) {
1444                         $db =& wfGetDB( DB_MASTER );
1445                 } else {
1446                         $db =& wfGetDB( DB_SLAVE );
1447                 }
1448
1449                 $res = $db->safeQuery(
1450                           "SELECT pl_namespace, pl_title
1451                              FROM !
1452                         LEFT JOIN !
1453                                ON pl_namespace=page_namespace
1454                               AND pl_title=page_title
1455                             WHERE pl_from=?
1456                               AND page_namespace IS NULL
1457                                   !",
1458                         $db->tableName( 'pagelinks' ),
1459                         $db->tableName( 'page' ),
1460                         $this->getArticleId(),
1461                         $options );
1462
1463                 $retVal = array();
1464                 if ( $db->numRows( $res ) ) {
1465                         while ( $row = $db->fetchObject( $res ) ) {
1466                                 $retVal[] = Title::makeTitle( $row->pl_namespace, $row->pl_title );
1467                         }
1468                 }
1469                 $db->freeResult( $res );
1470                 return $retVal;
1471         }
1472
1473
1474         /**
1475          * Get a list of URLs to purge from the Squid cache when this
1476          * page changes
1477          *
1478          * @return array the URLs
1479          * @access public
1480          */
1481         function getSquidURLs() {
1482                 return array(
1483                         $this->getInternalURL(),
1484                         $this->getInternalURL( 'action=history' )
1485                 );
1486         }
1487
1488         /**
1489          * Move this page without authentication
1490          * @param Title &$nt the new page Title
1491          * @access public
1492          */
1493         function moveNoAuth( &$nt ) {
1494                 return $this->moveTo( $nt, false );
1495         }
1496
1497         /**
1498          * Check whether a given move operation would be valid.
1499          * Returns true if ok, or a message key string for an error message
1500          * if invalid. (Scarrrrry ugly interface this.)
1501          * @param Title &$nt the new title
1502          * @param bool $auth indicates whether $wgUser's permissions
1503          *      should be checked
1504          * @return mixed true on success, message name on failure
1505          * @access public
1506          */
1507         function isValidMoveOperation( &$nt, $auth = true ) {
1508                 global $wgUser;
1509                 if( !$this or !$nt ) {
1510                         return 'badtitletext';
1511                 }
1512                 if( $this->equals( $nt ) ) {
1513                         return 'selfmove';
1514                 }
1515                 if( !$this->isMovable() || !$nt->isMovable() ) {
1516                         return 'immobile_namespace';
1517                 }
1518
1519                 $oldid = $this->getArticleID();
1520                 $newid = $nt->getArticleID();
1521
1522                 if ( strlen( $nt->getDBkey() ) < 1 ) {
1523                         return 'articleexists';
1524                 }
1525                 if ( ( '' == $this->getDBkey() ) ||
1526                          ( !$oldid ) ||
1527                      ( '' == $nt->getDBkey() ) ) {
1528                         return 'badarticleerror';
1529                 }
1530
1531                 if ( $auth && (
1532                                 !$this->userCanEdit() || !$nt->userCanEdit() ||
1533                                 !$this->userCanMove() || !$nt->userCanMove() ) ) {
1534                         return 'protectedpage';
1535                 }
1536
1537                 # The move is allowed only if (1) the target doesn't exist, or
1538                 # (2) the target is a redirect to the source, and has no history
1539                 # (so we can undo bad moves right after they're done).
1540
1541                 if ( 0 != $newid ) { # Target exists; check for validity
1542                         if ( ! $this->isValidMoveTarget( $nt ) ) {
1543                                 return 'articleexists';
1544                         }
1545                 }
1546                 return true;
1547         }
1548
1549         /**
1550          * Move a title to a new location
1551          * @param Title &$nt the new title
1552          * @param bool $auth indicates whether $wgUser's permissions
1553          *      should be checked
1554          * @return mixed true on success, message name on failure
1555          * @access public
1556          */
1557         function moveTo( &$nt, $auth = true, $reason = '' ) {
1558                 $err = $this->isValidMoveOperation( $nt, $auth );
1559                 if( is_string( $err ) ) {
1560                         return $err;
1561                 }
1562
1563                 $pageid = $this->getArticleID();
1564                 if( $nt->exists() ) {
1565                         $this->moveOverExistingRedirect( $nt, $reason );
1566                         $pageCountChange = 0;
1567                 } else { # Target didn't exist, do normal move.
1568                         $this->moveToNewTitle( $nt, $newid, $reason );
1569                         $pageCountChange = 1;
1570                 }
1571                 $redirid = $this->getArticleID();
1572
1573                 # Fixing category links (those without piped 'alternate' names) to be sorted under the new title
1574                 $dbw =& wfGetDB( DB_MASTER );
1575                 $categorylinks = $dbw->tableName( 'categorylinks' );
1576                 $sql = "UPDATE $categorylinks SET cl_sortkey=" . $dbw->addQuotes( $nt->getPrefixedText() ) .
1577                         " WHERE cl_from=" . $dbw->addQuotes( $pageid ) .
1578                         " AND cl_sortkey=" . $dbw->addQuotes( $this->getPrefixedText() );
1579                 $dbw->query( $sql, 'SpecialMovepage::doSubmit' );
1580
1581                 # Update watchlists
1582
1583                 $oldnamespace = $this->getNamespace() & ~1;
1584                 $newnamespace = $nt->getNamespace() & ~1;
1585                 $oldtitle = $this->getDBkey();
1586                 $newtitle = $nt->getDBkey();
1587
1588                 if( $oldnamespace != $newnamespace || $oldtitle != $newtitle ) {
1589                         WatchedItem::duplicateEntries( $this, $nt );
1590                 }
1591
1592                 # Update search engine
1593                 $u = new SearchUpdate( $pageid, $nt->getPrefixedDBkey() );
1594                 $u->doUpdate();
1595                 $u = new SearchUpdate( $redirid, $this->getPrefixedDBkey(), '' );
1596                 $u->doUpdate();
1597
1598                 # Update site_stats
1599                 if ( $this->getNamespace() == NS_MAIN and $nt->getNamespace() != NS_MAIN ) {
1600                         # Moved out of main namespace
1601                         # not viewed, edited, removing
1602                         $u = new SiteStatsUpdate( 0, 1, -1, $pageCountChange);
1603                 } elseif ( $this->getNamespace() != NS_MAIN and $nt->getNamespace() == NS_MAIN ) {
1604                         # Moved into main namespace
1605                         # not viewed, edited, adding
1606                         $u = new SiteStatsUpdate( 0, 1, +1, $pageCountChange );
1607                 } elseif ( $pageCountChange ) {
1608                         # Added redirect
1609                         $u = new SiteStatsUpdate( 0, 0, 0, 1 );
1610                 } else{
1611                         $u = false;
1612                 }
1613                 if ( $u ) {
1614                         $u->doUpdate();
1615                 }
1616
1617                 global $wgUser;
1618                 wfRunHooks( 'TitleMoveComplete', array( &$this, &$nt, &$wgUser, $pageid, $redirid ) );
1619                 return true;
1620         }
1621
1622         /**
1623          * Move page to a title which is at present a redirect to the
1624          * source page
1625          *
1626          * @param Title &$nt the page to move to, which should currently
1627          *      be a redirect
1628          * @access private
1629          */
1630         function moveOverExistingRedirect( &$nt, $reason = '' ) {
1631                 global $wgUser, $wgLinkCache, $wgUseSquid, $wgMwRedir;
1632                 $fname = 'Title::moveOverExistingRedirect';
1633                 $comment = wfMsgForContent( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() );
1634
1635                 if ( $reason ) {
1636                         $comment .= ": $reason";
1637                 }
1638
1639                 $now = wfTimestampNow();
1640                 $rand = wfRandom();
1641                 $newid = $nt->getArticleID();
1642                 $oldid = $this->getArticleID();
1643                 $dbw =& wfGetDB( DB_MASTER );
1644
1645                 # Delete the old redirect. We don't save it to history since
1646                 # by definition if we've got here it's rather uninteresting.
1647                 # We have to remove it so that the next step doesn't trigger
1648                 # a conflict on the unique namespace+title index...
1649                 $dbw->delete( 'page', array( 'page_id' => $newid ), $fname );
1650
1651                 # Save a null revision in the page's history notifying of the move
1652                 $nullRevision = Revision::newNullRevision( $dbw, $oldid,
1653                         wfMsgForContent( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() ),
1654                         true );
1655                 $nullRevId = $nullRevision->insertOn( $dbw );
1656
1657                 # Change the name of the target page:
1658                 $dbw->update( 'page',
1659                         /* SET */ array(
1660                                 'page_touched'   => $dbw->timestamp($now),
1661                                 'page_namespace' => $nt->getNamespace(),
1662                                 'page_title'     => $nt->getDBkey(),
1663                                 'page_latest'    => $nullRevId,
1664                         ),
1665                         /* WHERE */ array( 'page_id' => $oldid ),
1666                         $fname
1667                 );
1668                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
1669
1670                 # Recreate the redirect, this time in the other direction.
1671                 $redirectText = $wgMwRedir->getSynonym( 0 ) . ' [[' . $nt->getPrefixedText() . "]]\n";
1672                 $redirectArticle = new Article( $this );
1673                 $newid = $redirectArticle->insertOn( $dbw );
1674                 $redirectRevision = new Revision( array(
1675                         'page'    => $newid,
1676                         'comment' => $comment,
1677                         'text'    => $redirectText ) );
1678                 $revid = $redirectRevision->insertOn( $dbw );
1679                 $redirectArticle->updateRevisionOn( $dbw, $redirectRevision, 0 );
1680                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
1681
1682                 # Log the move
1683                 $log = new LogPage( 'move' );
1684                 $log->addEntry( 'move_redir', $this, $reason, array( 1 => $nt->getPrefixedText() ) );
1685
1686                 # Now, we record the link from the redirect to the new title.
1687                 # It should have no other outgoing links...
1688                 $dbw->delete( 'pagelinks', array( 'pl_from' => $newid ), $fname );
1689                 $dbw->insert( 'pagelinks',
1690                         array(
1691                                 'pl_from'      => $newid,
1692                                 'pl_namespace' => $nt->getNamespace(),
1693                                 'pl_title'     => $nt->getDbKey() ),
1694                         $fname );
1695
1696                 # Purge squid
1697                 if ( $wgUseSquid ) {
1698                         $urls = array_merge( $nt->getSquidURLs(), $this->getSquidURLs() );
1699                         $u = new SquidUpdate( $urls );
1700                         $u->doUpdate();
1701                 }
1702         }
1703
1704         /**
1705          * Move page to non-existing title.
1706          * @param Title &$nt the new Title
1707          * @param int &$newid set to be the new article ID
1708          * @access private
1709          */
1710         function moveToNewTitle( &$nt, &$newid, $reason = '' ) {
1711                 global $wgUser, $wgLinkCache, $wgUseSquid;
1712                 global $wgMwRedir;
1713                 $fname = 'MovePageForm::moveToNewTitle';
1714                 $comment = wfMsgForContent( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() );
1715                 if ( $reason ) {
1716                         $comment .= ": $reason";
1717                 }
1718
1719                 $newid = $nt->getArticleID();
1720                 $oldid = $this->getArticleID();
1721                 $dbw =& wfGetDB( DB_MASTER );
1722                 $now = $dbw->timestamp();
1723                 wfSeedRandom();
1724                 $rand = wfRandom();
1725
1726                 # Save a null revision in the page's history notifying of the move
1727                 $nullRevision = Revision::newNullRevision( $dbw, $oldid,
1728                         wfMsgForContent( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() ),
1729                         true );
1730                 $nullRevId = $nullRevision->insertOn( $dbw );
1731
1732                 # Rename cur entry
1733                 $dbw->update( 'page',
1734                         /* SET */ array(
1735                                 'page_touched'   => $now,
1736                                 'page_namespace' => $nt->getNamespace(),
1737                                 'page_title'     => $nt->getDBkey(),
1738                                 'page_latest'    => $nullRevId,
1739                         ),
1740                         /* WHERE */ array( 'page_id' => $oldid ),
1741                         $fname
1742                 );
1743
1744                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
1745
1746                 # Insert redirect
1747                 $redirectText = $wgMwRedir->getSynonym( 0 ) . ' [[' . $nt->getPrefixedText() . "]]\n";
1748                 $redirectArticle = new Article( $this );
1749                 $newid = $redirectArticle->insertOn( $dbw );
1750                 $redirectRevision = new Revision( array(
1751                         'page'    => $newid,
1752                         'comment' => $comment,
1753                         'text'    => $redirectText ) );
1754                 $revid = $redirectRevision->insertOn( $dbw );
1755                 $redirectArticle->updateRevisionOn( $dbw, $redirectRevision, 0 );
1756                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
1757
1758                 # Log the move
1759                 $log = new LogPage( 'move' );
1760                 $log->addEntry( 'move', $this, $reason, array( 1 => $nt->getPrefixedText()) );
1761
1762                 # Purge caches as per article creation
1763                 Article::onArticleCreate( $nt );
1764
1765                 # Record the just-created redirect's linking to the page
1766                 $dbw->insert( 'pagelinks',
1767                         array(
1768                                 'pl_from'      => $newid,
1769                                 'pl_namespace' => $nt->getNamespace(),
1770                                 'pl_title'     => $nt->getDBkey() ),
1771                         $fname );
1772
1773                 # Non-existent target may have had broken links to it; these must
1774                 # now be touched to update link coloring.
1775                 $nt->touchLinks();
1776
1777                 # Purge old title from squid
1778                 # The new title, and links to the new title, are purged in Article::onArticleCreate()
1779                 $titles = $nt->getLinksTo();
1780                 if ( $wgUseSquid ) {
1781                         $urls = $this->getSquidURLs();
1782                         foreach ( $titles as $linkTitle ) {
1783                                 $urls[] = $linkTitle->getInternalURL();
1784                         }
1785                         $u = new SquidUpdate( $urls );
1786                         $u->doUpdate();
1787                 }
1788         }
1789
1790         /**
1791          * Checks if $this can be moved to a given Title
1792          * - Selects for update, so don't call it unless you mean business
1793          *
1794          * @param Title &$nt the new title to check
1795          * @access public
1796          */
1797         function isValidMoveTarget( $nt ) {
1798
1799                 $fname = 'Title::isValidMoveTarget';
1800                 $dbw =& wfGetDB( DB_MASTER );
1801
1802                 # Is it a redirect?
1803                 $id  = $nt->getArticleID();
1804                 $obj = $dbw->selectRow( array( 'page', 'revision', 'text'),
1805                         array( 'page_is_redirect','old_text','old_flags' ),
1806                         array( 'page_id' => $id, 'page_latest=rev_id', 'rev_text_id=old_id' ),
1807                         $fname, 'FOR UPDATE' );
1808
1809                 if ( !$obj || 0 == $obj->page_is_redirect ) {
1810                         # Not a redirect
1811                         return false;
1812                 }
1813                 $text = Revision::getRevisionText( $obj );
1814
1815                 # Does the redirect point to the source?
1816                 if ( preg_match( "/\\[\\[\\s*([^\\]\\|]*)]]/", $text, $m ) ) {
1817                         $redirTitle = Title::newFromText( $m[1] );
1818                         if( !is_object( $redirTitle ) ||
1819                                 $redirTitle->getPrefixedDBkey() != $this->getPrefixedDBkey() ) {
1820                                 return false;
1821                         }
1822                 } else {
1823                         # Fail safe
1824                         return false;
1825                 }
1826
1827                 # Does the article have a history?
1828                 $row = $dbw->selectRow( array( 'page', 'revision'),
1829                         array( 'rev_id' ),
1830                         array( 'page_namespace' => $nt->getNamespace(),
1831                                 'page_title' => $nt->getDBkey(),
1832                                 'page_id=rev_page AND page_latest != rev_id'
1833                         ), $fname, 'FOR UPDATE'
1834                 );
1835
1836                 # Return true if there was no history
1837                 return $row === false;
1838         }
1839
1840         /**
1841          * Create a redirect; fails if the title already exists; does
1842          * not notify RC
1843          *
1844          * @param Title $dest the destination of the redirect
1845          * @param string $comment the comment string describing the move
1846          * @return bool true on success
1847          * @access public
1848          */
1849         function createRedirect( $dest, $comment ) {
1850                 global $wgUser;
1851                 if ( $this->getArticleID() ) {
1852                         return false;
1853                 }
1854
1855                 $fname = 'Title::createRedirect';
1856                 $dbw =& wfGetDB( DB_MASTER );
1857
1858                 $article = new Article( $this );
1859                 $newid = $article->insertOn( $dbw );
1860                 $revision = new Revision( array(
1861                         'page'      => $newid,
1862                         'comment'   => $comment,
1863                         'text'      => "#REDIRECT [[" . $dest->getPrefixedText() . "]]\n",
1864                         ) );
1865                 $revisionId = $revision->insertOn( $dbw );
1866                 $article->updateRevisionOn( $dbw, $revision, 0 );
1867
1868                 # Link table
1869                 $dbw->insert( 'pagelinks',
1870                         array(
1871                                 'pl_from'      => $newid,
1872                                 'pl_namespace' => $dest->getNamespace(),
1873                                 'pl_title'     => $dest->getDbKey()
1874                         ), $fname
1875                 );
1876
1877                 Article::onArticleCreate( $this );
1878                 return true;
1879         }
1880
1881         /**
1882          * Get categories to which this Title belongs and return an array of
1883          * categories' names.
1884          *
1885          * @return array an array of parents in the form:
1886          *      $parent => $currentarticle
1887          * @access public
1888          */
1889         function getParentCategories() {
1890                 global $wgContLang,$wgUser;
1891
1892                 $titlekey = $this->getArticleId();
1893                 $dbr =& wfGetDB( DB_SLAVE );
1894                 $categorylinks = $dbr->tableName( 'categorylinks' );
1895
1896                 # NEW SQL
1897                 $sql = "SELECT * FROM $categorylinks"
1898                      ." WHERE cl_from='$titlekey'"
1899                          ." AND cl_from <> '0'"
1900                          ." ORDER BY cl_sortkey";
1901
1902                 $res = $dbr->query ( $sql ) ;
1903
1904                 if($dbr->numRows($res) > 0) {
1905                         while ( $x = $dbr->fetchObject ( $res ) )
1906                                 //$data[] = Title::newFromText($wgContLang->getNSText ( NS_CATEGORY ).':'.$x->cl_to);
1907                                 $data[$wgContLang->getNSText ( NS_CATEGORY ).':'.$x->cl_to] = $this->getFullText();
1908                         $dbr->freeResult ( $res ) ;
1909                 } else {
1910                         $data = '';
1911                 }
1912                 return $data;
1913         }
1914
1915         /**
1916          * Get a tree of parent categories
1917          * @param array $children an array with the children in the keys, to check for circular refs
1918          * @return array
1919          * @access public
1920          */
1921         function getParentCategoryTree( $children = array() ) {
1922                 $parents = $this->getParentCategories();
1923
1924                 if($parents != '') {
1925                         foreach($parents as $parent => $current) {
1926                                 if ( array_key_exists( $parent, $children ) ) {
1927                                         # Circular reference
1928                                         $stack[$parent] = array();
1929                                 } else {
1930                                         $nt = Title::newFromText($parent);
1931                                         $stack[$parent] = $nt->getParentCategoryTree( $children + array($parent => 1) );
1932                                 }
1933                         }
1934                         return $stack;
1935                 } else {
1936                         return array();
1937                 }
1938         }
1939
1940
1941         /**
1942          * Get an associative array for selecting this title from
1943          * the "cur" table
1944          *
1945          * @return array
1946          * @access public
1947          */
1948         function curCond() {
1949                 wfDebugDieBacktrace( 'curCond called' );
1950                 return array( 'cur_namespace' => $this->mNamespace, 'cur_title' => $this->mDbkeyform );
1951         }
1952
1953         /**
1954          * Get an associative array for selecting this title from the
1955          * "old" table
1956          *
1957          * @return array
1958          * @access public
1959          */
1960         function oldCond() {
1961                 wfDebugDieBacktrace( 'oldCond called' );
1962                 return array( 'old_namespace' => $this->mNamespace, 'old_title' => $this->mDbkeyform );
1963         }
1964
1965         /**
1966          * Get the revision ID of the previous revision
1967          *
1968          * @param integer $revision  Revision ID. Get the revision that was before this one.
1969          * @return interger $oldrevision|false
1970          */
1971         function getPreviousRevisionID( $revision ) {
1972                 $dbr =& wfGetDB( DB_SLAVE );
1973                 return $dbr->selectField( 'revision', 'rev_id',
1974                         'rev_page=' . intval( $this->getArticleId() ) .
1975                         ' AND rev_id<' . intval( $revision ) . ' ORDER BY rev_id DESC' );
1976         }
1977
1978         /**
1979          * Get the revision ID of the next revision
1980          *
1981          * @param integer $revision  Revision ID. Get the revision that was after this one.
1982          * @return interger $oldrevision|false
1983          */
1984         function getNextRevisionID( $revision ) {
1985                 $dbr =& wfGetDB( DB_SLAVE );
1986                 return $dbr->selectField( 'revision', 'rev_id',
1987                         'rev_page=' . intval( $this->getArticleId() ) .
1988                         ' AND rev_id>' . intval( $revision ) . ' ORDER BY rev_id' );
1989         }
1990
1991         /**
1992          * Compare with another title.
1993          *
1994          * @param Title $title
1995          * @return bool
1996          */
1997         function equals( $title ) {
1998                 return $this->getInterwiki() == $title->getInterwiki()
1999                         && $this->getNamespace() == $title->getNamespace()
2000                         && $this->getDbkey() == $title->getDbkey();
2001         }
2002
2003         /**
2004          * Check if page exists
2005          * @return bool
2006          */
2007         function exists() {
2008                 return $this->getArticleId() != 0;
2009         }
2010
2011         /**
2012          * Should a link should be displayed as a known link, just based on its title?
2013          *
2014          * Currently, a self-link with a fragment and special pages are in
2015          * this category. Special pages never exist in the database.
2016          */
2017         function isAlwaysKnown() {
2018                 return  $this->isExternal() || ( 0 == $this->mNamespace && "" == $this->mDbkeyform )
2019                   || NS_SPECIAL == $this->mNamespace;
2020         }
2021
2022         /**
2023          * Update page_touched timestamps on pages linking to this title.
2024          * In principal, this could be backgrounded and could also do squid
2025          * purging.
2026          */
2027         function touchLinks() {
2028                 $fname = 'Title::touchLinks';
2029
2030                 $dbw =& wfGetDB( DB_MASTER );
2031
2032                 $res = $dbw->select( 'pagelinks',
2033                         array( 'pl_from' ),
2034                         array(
2035                                 'pl_namespace' => $this->getNamespace(),
2036                                 'pl_title'     => $this->getDbKey() ),
2037                         $fname );
2038                 if ( 0 == $dbw->numRows( $res ) ) {
2039                         return;
2040                 }
2041
2042                 $toucharr = array();
2043                 while( $row = $dbw->fetchObject( $res ) ) {
2044                         $toucharr[] = $row->pl_from;
2045                 }
2046                 if (!count($toucharr))
2047                         return;
2048                 $dbw->update( 'page', /* SET */ array( 'page_touched' => $dbw->timestamp() ),
2049                                                         /* WHERE */ array( 'page_id' => $toucharr ),$fname);
2050         }
2051
2052         function trackbackURL() {
2053                 global $wgTitle, $wgScriptPath, $wgServer;
2054
2055                 return "$wgServer$wgScriptPath/trackback.php?article="
2056                         . htmlspecialchars(urlencode($wgTitle->getPrefixedDBkey()));
2057         }
2058
2059         function trackbackRDF() {
2060                 $url = htmlspecialchars($this->getFullURL());
2061                 $title = htmlspecialchars($this->getText());
2062                 $tburl = $this->trackbackURL();
2063
2064                 return "
2065 <rdf:RDF xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\"
2066          xmlns:dc=\"http://purl.org/dc/elements/1.1/\"
2067          xmlns:trackback=\"http://madskills.com/public/xml/rss/module/trackback/\">
2068 <rdf:Description
2069    rdf:about=\"$url\"
2070    dc:identifier=\"$url\"
2071    dc:title=\"$title\"
2072    trackback:ping=\"$tburl\" />
2073 </rdf:RDF>";
2074         }
2075 }
2076 ?>