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, $transludeonly = false ) {
 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                 $page = $dbw->tableName( 'page' );
 480                 /*
 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                 wfProfileOut( $fname );
 911                 return true;
 912         }
 913
 914         /**
 915          * Can $wgUser edit this page?
 916          * @return boolean
 917          * @access public
 918          */
 919         function userCanEdit() {
 920                 return $this->userCan('edit');
 921         }
 922
 923         /**
 924          * Can $wgUser move this page?
 925          * @return boolean
 926          * @access public
 927          */
 928         function userCanMove() {
 929                 return $this->userCan('move');
 930         }
 931
 932         /**
 933          * Would anybody with sufficient privileges be able to move this page?
 934          * Some pages just aren't movable.
 935          *
 936          * @return boolean
 937          * @access public
 938          */
 939         function isMovable() {
 940                 return Namespace::isMovable( $this->getNamespace() )
 941                         && $this->getInterwiki() == '';
 942         }
 943
 944         /**
 945          * Can $wgUser read this page?
 946          * @return boolean
 947          * @access public
 948          */
 949         function userCanRead() {
 950                 global $wgUser;
 951
 952                 if( $wgUser->isAllowed('read') ) {
 953                         return true;
 954                 } else {
 955                         global $wgWhitelistRead;
 956
 957                         /** If anon users can create an account,
 958                             they need to reach the login page first! */
 959                         if( $wgUser->isAllowed( 'createaccount' )
 960                             && $this->getNamespace() == NS_SPECIAL
 961                             && $this->getText() == 'Userlogin' ) {
 962                                 return true;
 963                         }
 964
 965                         /** some pages are explicitly allowed */
 966                         $name = $this->getPrefixedText();
 967                         if( $wgWhitelistRead && in_array( $name, $wgWhitelistRead ) ) {
 968                                 return true;
 969                         }
 970
 971                         # Compatibility with old settings
 972                         if( $wgWhitelistRead && $this->getNamespace() == NS_MAIN ) {
 973                                 if( in_array( ':' . $name, $wgWhitelistRead ) ) {
 974                                         return true;
 975                                 }
 976                         }
 977                 }
 978                 return false;
 979         }
 980
 981         /**
 982          * Is this a talk page of some sort?
 983          * @return bool
 984          * @access public
 985          */
 986         function isTalkPage() {
 987                 return Namespace::isTalk( $this->getNamespace() );
 988         }
 989
 990         /**
 991          * Is this a .css or .js subpage of a user page?
 992          * @return bool
 993          * @access public
 994          */
 995         function isCssJsSubpage() {
 996                 return ( NS_USER == $this->mNamespace and preg_match("/\\.(css|js)$/", $this->mTextform ) );
 997         }
 998         /**
 999          * Is this a .css subpage of a user page?
1000          * @return bool
1001          * @access public
1002          */
1003         function isCssSubpage() {
1004                 return ( NS_USER == $this->mNamespace and preg_match("/\\.css$/", $this->mTextform ) );
1005         }
1006         /**
1007          * Is this a .js subpage of a user page?
1008          * @return bool
1009          * @access public
1010          */
1011         function isJsSubpage() {
1012                 return ( NS_USER == $this->mNamespace and preg_match("/\\.js$/", $this->mTextform ) );
1013         }
1014         /**
1015          * Protect css/js subpages of user pages: can $wgUser edit
1016          * this page?
1017          *
1018          * @return boolean
1019          * @todo XXX: this might be better using restrictions
1020          * @access public
1021          */
1022         function userCanEditCssJsSubpage() {
1023                 global $wgUser;
1024                 return ( $wgUser->isAllowed('editinterface') or preg_match('/^'.preg_quote($wgUser->getName(), '/').'\//', $this->mTextform) );
1025         }
1026
1027         /**
1028          * Loads a string into mRestrictions array
1029          * @param string $res restrictions in string format
1030          * @access public
1031          */
1032         function loadRestrictions( $res ) {
1033                 foreach( explode( ':', trim( $res ) ) as $restrict ) {
1034                         $temp = explode( '=', trim( $restrict ) );
1035                         if(count($temp) == 1) {
1036                                 // old format should be treated as edit/move restriction
1037                                 $this->mRestrictions["edit"] = explode( ',', trim( $temp[0] ) );
1038                                 $this->mRestrictions["move"] = explode( ',', trim( $temp[0] ) );
1039                         } else {
1040                                 $this->mRestrictions[$temp[0]] = explode( ',', trim( $temp[1] ) );
1041                         }
1042                 }
1043                 $this->mRestrictionsLoaded = true;
1044         }
1045
1046         /**
1047          * Accessor/initialisation for mRestrictions
1048          * @param string $action action that permission needs to be checked for
1049          * @return array the array of groups allowed to edit this article
1050          * @access public
1051          */
1052         function getRestrictions($action) {
1053                 $id = $this->getArticleID();
1054                 if ( 0 == $id ) { return array(); }
1055
1056                 if ( ! $this->mRestrictionsLoaded ) {
1057                         $dbr =& wfGetDB( DB_SLAVE );
1058                         $res = $dbr->selectField( 'page', 'page_restrictions', 'page_id='.$id );
1059                         $this->loadRestrictions( $res );
1060                 }
1061                 if( isset( $this->mRestrictions[$action] ) ) {
1062                         return $this->mRestrictions[$action];
1063                 }
1064                 return array();
1065         }
1066
1067         /**
1068          * Is there a version of this page in the deletion archive?
1069          * @return int the number of archived revisions
1070          * @access public
1071          */
1072         function isDeleted() {
1073                 $fname = 'Title::isDeleted';
1074                 if ( $this->getNamespace() < 0 ) {
1075                         $n = 0;
1076                 } else {
1077                         $dbr =& wfGetDB( DB_SLAVE );
1078                         $n = $dbr->selectField( 'archive', 'COUNT(*)', array( 'ar_namespace' => $this->getNamespace(),
1079                                 'ar_title' => $this->getDBkey() ), $fname );
1080                 }
1081                 return (int)$n;
1082         }
1083
1084         /**
1085          * Get the article ID for this Title from the link cache,
1086          * adding it if necessary
1087          * @param int $flags a bit field; may be GAID_FOR_UPDATE to select
1088          *      for update
1089          * @return int the ID
1090          * @access public
1091          */
1092         function getArticleID( $flags = 0 ) {
1093                 global $wgLinkCache;
1094                 if ( $flags & GAID_FOR_UPDATE ) {
1095                         $oldUpdate = $wgLinkCache->forUpdate( true );
1096                         $this->mArticleID = $wgLinkCache->addLinkObj( $this );
1097                         $wgLinkCache->forUpdate( $oldUpdate );
1098                 } else {
1099                         if ( -1 == $this->mArticleID ) {
1100                                 $this->mArticleID = $wgLinkCache->addLinkObj( $this );
1101                         }
1102                 }
1103                 return $this->mArticleID;
1104         }
1105
1106         function getLatestRevID() {
1107                 if ($this->mLatestID !== false)
1108                         return $this->mLatestID;
1109
1110                 $db =& wfGetDB(DB_SLAVE);
1111                 return $this->mLatestID = $db->selectField( 'revision',
1112                         "max(rev_id)",
1113                         array('rev_page' => $this->getArticleID()),
1114                         'Title::getLatestRevID' );
1115         }
1116
1117         /**
1118          * This clears some fields in this object, and clears any associated
1119          * keys in the "bad links" section of $wgLinkCache.
1120          *
1121          * - This is called from Article::insertNewArticle() to allow
1122          * loading of the new page_id. It's also called from
1123          * Article::doDeleteArticle()
1124          *
1125          * @param int $newid the new Article ID
1126          * @access public
1127          */
1128         function resetArticleID( $newid ) {
1129                 global $wgLinkCache;
1130                 $wgLinkCache->clearBadLink( $this->getPrefixedDBkey() );
1131
1132                 if ( 0 == $newid ) { $this->mArticleID = -1; }
1133                 else { $this->mArticleID = $newid; }
1134                 $this->mRestrictionsLoaded = false;
1135                 $this->mRestrictions = array();
1136         }
1137
1138         /**
1139          * Updates page_touched for this page; called from LinksUpdate.php
1140          * @return bool true if the update succeded
1141          * @access public
1142          */
1143         function invalidateCache() {
1144                 global $wgUseFileCache;
1145
1146                 if ( wfReadOnly() ) {
1147                         return;
1148                 }
1149
1150                 $now = wfTimestampNow();
1151                 $dbw =& wfGetDB( DB_MASTER );
1152                 $success = $dbw->update( 'page',
1153                         array( /* SET */
1154                                 'page_touched' => $dbw->timestamp()
1155                         ), array( /* WHERE */
1156                                 'page_namespace' => $this->getNamespace() ,
1157                                 'page_title' => $this->getDBkey()
1158                         ), 'Title::invalidateCache'
1159                 );
1160
1161                 if ($wgUseFileCache) {
1162                         $cache = new CacheManager($this);
1163                         @unlink($cache->fileCacheName());
1164                 }
1165
1166                 return $success;
1167         }
1168
1169         /**
1170          * Prefix some arbitrary text with the namespace or interwiki prefix
1171          * of this object
1172          *
1173          * @param string $name the text
1174          * @return string the prefixed text
1175          * @access private
1176          */
1177         /* private */ function prefix( $name ) {
1178                 global $wgContLang;
1179
1180                 $p = '';
1181                 if ( '' != $this->mInterwiki ) {
1182                         $p = $this->mInterwiki . ':';
1183                 }
1184                 if ( 0 != $this->mNamespace ) {
1185                         $p .= $wgContLang->getNsText( $this->mNamespace ) . ':';
1186                 }
1187                 return $p . $name;
1188         }
1189
1190         /**
1191          * Secure and split - main initialisation function for this object
1192          *
1193          * Assumes that mDbkeyform has been set, and is urldecoded
1194          * and uses underscores, but not otherwise munged.  This function
1195          * removes illegal characters, splits off the interwiki and
1196          * namespace prefixes, sets the other forms, and canonicalizes
1197          * everything.
1198          * @return bool true on success
1199          * @access private
1200          */
1201         /* private */ function secureAndSplit() {
1202                 global $wgContLang, $wgLocalInterwiki, $wgCapitalLinks;
1203                 $fname = 'Title::secureAndSplit';
1204                 wfProfileIn( $fname );
1205
1206                 # Initialisation
1207                 static $rxTc = false;
1208                 if( !$rxTc ) {
1209                         # % is needed as well
1210                         $rxTc = '/[^' . Title::legalChars() . ']|%[0-9A-Fa-f]{2}/S';
1211                 }
1212
1213                 $this->mInterwiki = $this->mFragment = '';
1214                 $this->mNamespace = $this->mDefaultNamespace; # Usually NS_MAIN
1215
1216                 # Clean up whitespace
1217                 #
1218                 $t = preg_replace( '/[ _]+/', '_', $this->mDbkeyform );
1219                 $t = trim( $t, '_' );
1220
1221                 if ( '' == $t ) {
1222                         wfProfileOut( $fname );
1223                         return false;
1224                 }
1225
1226                 if( false !== strpos( $t, UTF8_REPLACEMENT ) ) {
1227                         # Contained illegal UTF-8 sequences or forbidden Unicode chars.
1228                         wfProfileOut( $fname );
1229                         return false;
1230                 }
1231
1232                 $this->mDbkeyform = $t;
1233
1234                 # Initial colon indicates main namespace rather than specified default
1235                 # but should not create invalid {ns,title} pairs such as {0,Project:Foo}
1236                 if ( ':' == $t{0} ) {
1237                         $this->mNamespace = NS_MAIN;
1238                         $t = substr( $t, 1 ); # remove the colon but continue processing
1239                 }
1240
1241                 # Namespace or interwiki prefix
1242                 $firstPass = true;
1243                 do {
1244                         if ( preg_match( "/^(.+?)_*:_*(.*)$/S", $t, $m ) ) {
1245                                 $p = $m[1];
1246                                 $lowerNs = strtolower( $p );
1247                                 if ( $ns = Namespace::getCanonicalIndex( $lowerNs ) ) {
1248                                         # Canonical namespace
1249                                         $t = $m[2];
1250                                         $this->mNamespace = $ns;
1251                                 } elseif ( $ns = $wgContLang->getNsIndex( $lowerNs )) {
1252                                         # Ordinary namespace
1253                                         $t = $m[2];
1254                                         $this->mNamespace = $ns;
1255                                 } elseif( $this->getInterwikiLink( $p ) ) {
1256                                         if( !$firstPass ) {
1257                                                 # Can't make a local interwiki link to an interwiki link.
1258                                                 # That's just crazy!
1259                                                 wfProfileOut( $fname );
1260                                                 return false;
1261                                         }
1262
1263                                         # Interwiki link
1264                                         $t = $m[2];
1265                                         $this->mInterwiki = strtolower( $p );
1266
1267                                         # Redundant interwiki prefix to the local wiki
1268                                         if ( 0 == strcasecmp( $this->mInterwiki, $wgLocalInterwiki ) ) {
1269                                                 if( $t == '' ) {
1270                                                         # Can't have an empty self-link
1271                                                         wfProfileOut( $fname );
1272                                                         return false;
1273                                                 }
1274                                                 $this->mInterwiki = '';
1275                                                 $firstPass = false;
1276                                                 # Do another namespace split...
1277                                                 continue;
1278                                         }
1279                                 }
1280                                 # If there's no recognized interwiki or namespace,
1281                                 # then let the colon expression be part of the title.
1282                         }
1283                         break;
1284                 } while( true );
1285                 $r = $t;
1286
1287                 # We already know that some pages won't be in the database!
1288                 #
1289                 if ( '' != $this->mInterwiki || -1 == $this->mNamespace ) {
1290                         $this->mArticleID = 0;
1291                 }
1292                 $f = strstr( $r, '#' );
1293                 if ( false !== $f ) {
1294                         $this->mFragment = substr( $f, 1 );
1295                         $r = substr( $r, 0, strlen( $r ) - strlen( $f ) );
1296                         # remove whitespace again: prevents "Foo_bar_#"
1297                         # becoming "Foo_bar_"
1298                         $r = preg_replace( '/_*$/', '', $r );
1299                 }
1300
1301                 # Reject illegal characters.
1302                 #
1303                 if( preg_match( $rxTc, $r ) ) {
1304                         wfProfileOut( $fname );
1305                         return false;
1306                 }
1307
1308                 /**
1309                  * Pages with "/./" or "/../" appearing in the URLs will
1310                  * often be unreachable due to the way web browsers deal
1311                  * with 'relative' URLs. Forbid them explicitly.
1312                  */
1313                 if ( strpos( $r, '.' ) !== false &&
1314                      ( $r === '.' || $r === '..' ||
1315                        strpos( $r, './' ) === 0  ||
1316                        strpos( $r, '../' ) === 0 ||
1317                        strpos( $r, '/./' ) !== false ||
1318                        strpos( $r, '/../' ) !== false ) )
1319                 {
1320                         wfProfileOut( $fname );
1321                         return false;
1322                 }
1323
1324                 # We shouldn't need to query the DB for the size.
1325                 #$maxSize = $dbr->textFieldSize( 'page', 'page_title' );
1326                 if ( strlen( $r ) > 255 ) {
1327                         wfProfileOut( $fname );
1328                         return false;
1329                 }
1330
1331                 /**
1332                  * Normally, all wiki links are forced to have
1333                  * an initial capital letter so [[foo]] and [[Foo]]
1334                  * point to the same place.
1335                  *
1336                  * Don't force it for interwikis, since the other
1337                  * site might be case-sensitive.
1338                  */
1339                 if( $wgCapitalLinks && $this->mInterwiki == '') {
1340                         $t = $wgContLang->ucfirst( $r );
1341                 } else {
1342                         $t = $r;
1343                 }
1344
1345                 /**
1346                  * Can't make a link to a namespace alone...
1347                  * "empty" local links can only be self-links
1348                  * with a fragment identifier.
1349                  */
1350                 if( $t == '' &&
1351                         $this->mInterwiki == '' &&
1352                         $this->mNamespace != NS_MAIN ) {
1353                         wfProfileOut( $fname );
1354                         return false;
1355                 }
1356
1357                 # Fill fields
1358                 $this->mDbkeyform = $t;
1359                 $this->mUrlform = wfUrlencode( $t );
1360
1361                 $this->mTextform = str_replace( '_', ' ', $t );
1362
1363                 wfProfileOut( $fname );
1364                 return true;
1365         }
1366
1367         /**
1368          * Get a Title object associated with the talk page of this article
1369          * @return Title the object for the talk page
1370          * @access public
1371          */
1372         function getTalkPage() {
1373                 return Title::makeTitle( Namespace::getTalk( $this->getNamespace() ), $this->getDBkey() );
1374         }
1375
1376         /**
1377          * Get a title object associated with the subject page of this
1378          * talk page
1379          *
1380          * @return Title the object for the subject page
1381          * @access public
1382          */
1383         function getSubjectPage() {
1384                 return Title::makeTitle( Namespace::getSubject( $this->getNamespace() ), $this->getDBkey() );
1385         }
1386
1387         /**
1388          * Get an array of Title objects linking to this Title
1389          * Also stores the IDs in the link cache.
1390          *
1391          * @param string $options may be FOR UPDATE
1392          * @return array the Title objects linking here
1393          * @access public
1394          */
1395         function getLinksTo( $options = '' ) {
1396                 global $wgLinkCache;
1397                 $id = $this->getArticleID();
1398
1399                 if ( $options ) {
1400                         $db =& wfGetDB( DB_MASTER );
1401                 } else {
1402                         $db =& wfGetDB( DB_SLAVE );
1403                 }
1404
1405                 $res = $db->select( array( 'page', 'pagelinks' ),
1406                         array( 'page_namespace', 'page_title', 'page_id' ),
1407                         array(
1408                                 'pl_from=page_id',
1409                                 'pl_namespace' => $this->getNamespace(),
1410                                 'pl_title'     => $this->getDbKey() ),
1411                         'Title::getLinksTo',
1412                         $options );
1413
1414                 $retVal = array();
1415                 if ( $db->numRows( $res ) ) {
1416                         while ( $row = $db->fetchObject( $res ) ) {
1417                                 if ( $titleObj = Title::makeTitle( $row->page_namespace, $row->page_title ) ) {
1418                                         $wgLinkCache->addGoodLinkObj( $row->page_id, $titleObj );
1419                                         $retVal[] = $titleObj;
1420                                 }
1421                         }
1422                 }
1423                 $db->freeResult( $res );
1424                 return $retVal;
1425         }
1426
1427         /**
1428          * Get an array of Title objects referring to non-existent articles linked from this page
1429          *
1430          * @param string $options may be FOR UPDATE
1431          * @return array the Title objects
1432          * @access public
1433          */
1434         function getBrokenLinksFrom( $options = '' ) {
1435                 global $wgLinkCache;
1436
1437                 if ( $options ) {
1438                         $db =& wfGetDB( DB_MASTER );
1439                 } else {
1440                         $db =& wfGetDB( DB_SLAVE );
1441                 }
1442
1443                 $res = $db->safeQuery(
1444                           "SELECT pl_namespace, pl_title
1445                              FROM !
1446                         LEFT JOIN !
1447                                ON pl_namespace=page_namespace
1448                               AND pl_title=page_title
1449                             WHERE pl_from=?
1450                               AND page_namespace IS NULL
1451                                   !",
1452                         $db->tableName( 'pagelinks' ),
1453                         $db->tableName( 'page' ),
1454                         $this->getArticleId(),
1455                         $options );
1456
1457                 $retVal = array();
1458                 if ( $db->numRows( $res ) ) {
1459                         while ( $row = $db->fetchObject( $res ) ) {
1460                                 $retVal[] = Title::makeTitle( $row->pl_namespace, $row->pl_title );
1461                         }
1462                 }
1463                 $db->freeResult( $res );
1464                 return $retVal;
1465         }
1466
1467
1468         /**
1469          * Get a list of URLs to purge from the Squid cache when this
1470          * page changes
1471          *
1472          * @return array the URLs
1473          * @access public
1474          */
1475         function getSquidURLs() {
1476                 return array(
1477                         $this->getInternalURL(),
1478                         $this->getInternalURL( 'action=history' )
1479                 );
1480         }
1481
1482         /**
1483          * Move this page without authentication
1484          * @param Title &$nt the new page Title
1485          * @access public
1486          */
1487         function moveNoAuth( &$nt ) {
1488                 return $this->moveTo( $nt, false );
1489         }
1490
1491         /**
1492          * Check whether a given move operation would be valid.
1493          * Returns true if ok, or a message key string for an error message
1494          * if invalid. (Scarrrrry ugly interface this.)
1495          * @param Title &$nt the new title
1496          * @param bool $auth indicates whether $wgUser's permissions
1497          *      should be checked
1498          * @return mixed true on success, message name on failure
1499          * @access public
1500          */
1501         function isValidMoveOperation( &$nt, $auth = true, $reason = '' ) {
1502                 global $wgUser;
1503                 if( !$this or !$nt ) {
1504                         return 'badtitletext';
1505                 }
1506                 if( $this->equals( $nt ) ) {
1507                         return 'selfmove';
1508                 }
1509                 if( !$this->isMovable() || !$nt->isMovable() ) {
1510                         return 'immobile_namespace';
1511                 }
1512
1513                 $fname = 'Title::move';
1514                 $oldid = $this->getArticleID();
1515                 $newid = $nt->getArticleID();
1516
1517                 if ( strlen( $nt->getDBkey() ) < 1 ) {
1518                         return 'articleexists';
1519                 }
1520                 if ( ( '' == $this->getDBkey() ) ||
1521                          ( !$oldid ) ||
1522                      ( '' == $nt->getDBkey() ) ) {
1523                         return 'badarticleerror';
1524                 }
1525
1526                 if ( $auth && (
1527                                 !$this->userCanEdit() || !$nt->userCanEdit() ||
1528                                 !$this->userCanMove() || !$nt->userCanMove() ) ) {
1529                         return 'protectedpage';
1530                 }
1531
1532                 # The move is allowed only if (1) the target doesn't exist, or
1533                 # (2) the target is a redirect to the source, and has no history
1534                 # (so we can undo bad moves right after they're done).
1535
1536                 if ( 0 != $newid ) { # Target exists; check for validity
1537                         if ( ! $this->isValidMoveTarget( $nt ) ) {
1538                                 return 'articleexists';
1539                         }
1540                 }
1541                 return true;
1542         }
1543
1544         /**
1545          * Move a title to a new location
1546          * @param Title &$nt the new title
1547          * @param bool $auth indicates whether $wgUser's permissions
1548          *      should be checked
1549          * @return mixed true on success, message name on failure
1550          * @access public
1551          */
1552         function moveTo( &$nt, $auth = true, $reason = '' ) {
1553                 $err = $this->isValidMoveOperation( $nt, $auth, $reason );
1554                 if( is_string( $err ) ) {
1555                         return $err;
1556                 }
1557
1558                 $pageid = $this->getArticleID();
1559                 if( $nt->exists() ) {
1560                         $this->moveOverExistingRedirect( $nt, $reason );
1561                         $pageCountChange = 0;
1562                 } else { # Target didn't exist, do normal move.
1563                         $this->moveToNewTitle( $nt, $newid, $reason );
1564                         $pageCountChange = 1;
1565                 }
1566                 $redirid = $this->getArticleID();
1567
1568                 # Fixing category links (those without piped 'alternate' names) to be sorted under the new title
1569                 $dbw =& wfGetDB( DB_MASTER );
1570                 $categorylinks = $dbw->tableName( 'categorylinks' );
1571                 $sql = "UPDATE $categorylinks SET cl_sortkey=" . $dbw->addQuotes( $nt->getPrefixedText() ) .
1572                         " WHERE cl_from=" . $dbw->addQuotes( $pageid ) .
1573                         " AND cl_sortkey=" . $dbw->addQuotes( $this->getPrefixedText() );
1574                 $dbw->query( $sql, 'SpecialMovepage::doSubmit' );
1575
1576                 # Update watchlists
1577
1578                 $oldnamespace = $this->getNamespace() & ~1;
1579                 $newnamespace = $nt->getNamespace() & ~1;
1580                 $oldtitle = $this->getDBkey();
1581                 $newtitle = $nt->getDBkey();
1582
1583                 if( $oldnamespace != $newnamespace || $oldtitle != $newtitle ) {
1584                         WatchedItem::duplicateEntries( $this, $nt );
1585                 }
1586
1587                 # Update search engine
1588                 $u = new SearchUpdate( $pageid, $nt->getPrefixedDBkey() );
1589                 $u->doUpdate();
1590                 $u = new SearchUpdate( $redirid, $this->getPrefixedDBkey(), '' );
1591                 $u->doUpdate();
1592
1593                 # Update site_stats
1594                 if ( $this->getNamespace() == NS_MAIN and $nt->getNamespace() != NS_MAIN ) {
1595                         # Moved out of main namespace
1596                         # not viewed, edited, removing
1597                         $u = new SiteStatsUpdate( 0, 1, -1, $pageCountChange);
1598                 } elseif ( $this->getNamespace() != NS_MAIN and $nt->getNamespace() == NS_MAIN ) {
1599                         # Moved into main namespace
1600                         # not viewed, edited, adding
1601                         $u = new SiteStatsUpdate( 0, 1, +1, $pageCountChange );
1602                 } elseif ( $pageCountChange ) {
1603                         # Added redirect
1604                         $u = new SiteStatsUpdate( 0, 0, 0, 1 );
1605                 } else{
1606                         $u = false;
1607                 }
1608                 if ( $u ) {
1609                         $u->doUpdate();
1610                 }
1611
1612                 global $wgUser;
1613                 wfRunHooks( 'TitleMoveComplete', array( &$this, &$nt, &$wgUser, $pageid, $redirid ) );
1614                 return true;
1615         }
1616
1617         /**
1618          * Move page to a title which is at present a redirect to the
1619          * source page
1620          *
1621          * @param Title &$nt the page to move to, which should currently
1622          *      be a redirect
1623          * @access private
1624          */
1625         function moveOverExistingRedirect( &$nt, $reason = '' ) {
1626                 global $wgUser, $wgLinkCache, $wgUseSquid, $wgMwRedir;
1627                 $fname = 'Title::moveOverExistingRedirect';
1628                 $comment = wfMsgForContent( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() );
1629
1630                 if ( $reason ) {
1631                         $comment .= ": $reason";
1632                 }
1633
1634                 $now = wfTimestampNow();
1635                 $rand = wfRandom();
1636                 $newid = $nt->getArticleID();
1637                 $oldid = $this->getArticleID();
1638                 $dbw =& wfGetDB( DB_MASTER );
1639                 $links = $dbw->tableName( 'links' );
1640
1641                 # Delete the old redirect. We don't save it to history since
1642                 # by definition if we've got here it's rather uninteresting.
1643                 # We have to remove it so that the next step doesn't trigger
1644                 # a conflict on the unique namespace+title index...
1645                 $dbw->delete( 'page', array( 'page_id' => $newid ), $fname );
1646
1647                 # Save a null revision in the page's history notifying of the move
1648                 $nullRevision = Revision::newNullRevision( $dbw, $oldid,
1649                         wfMsgForContent( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() ),
1650                         true );
1651                 $nullRevId = $nullRevision->insertOn( $dbw );
1652
1653                 # Change the name of the target page:
1654                 $dbw->update( 'page',
1655                         /* SET */ array(
1656                                 'page_touched'   => $dbw->timestamp($now),
1657                                 'page_namespace' => $nt->getNamespace(),
1658                                 'page_title'     => $nt->getDBkey(),
1659                                 'page_latest'    => $nullRevId,
1660                         ),
1661                         /* WHERE */ array( 'page_id' => $oldid ),
1662                         $fname
1663                 );
1664                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
1665
1666                 # Recreate the redirect, this time in the other direction.
1667                 $redirectText = $wgMwRedir->getSynonym( 0 ) . ' [[' . $nt->getPrefixedText() . "]]\n";
1668                 $redirectArticle = new Article( $this );
1669                 $newid = $redirectArticle->insertOn( $dbw );
1670                 $redirectRevision = new Revision( array(
1671                         'page'    => $newid,
1672                         'comment' => $comment,
1673                         'text'    => $redirectText ) );
1674                 $revid = $redirectRevision->insertOn( $dbw );
1675                 $redirectArticle->updateRevisionOn( $dbw, $redirectRevision, 0 );
1676                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
1677
1678                 # Log the move
1679                 $log = new LogPage( 'move' );
1680                 $log->addEntry( 'move_redir', $this, $reason, array( 1 => $nt->getPrefixedText() ) );
1681
1682                 # Now, we record the link from the redirect to the new title.
1683                 # It should have no other outgoing links...
1684                 $dbw->delete( 'pagelinks', array( 'pl_from' => $newid ), $fname );
1685                 $dbw->insert( 'pagelinks',
1686                         array(
1687                                 'pl_from'      => $newid,
1688                                 'pl_namespace' => $nt->getNamespace(),
1689                                 'pl_title'     => $nt->getDbKey() ),
1690                         $fname );
1691
1692                 # Purge squid
1693                 if ( $wgUseSquid ) {
1694                         $urls = array_merge( $nt->getSquidURLs(), $this->getSquidURLs() );
1695                         $u = new SquidUpdate( $urls );
1696                         $u->doUpdate();
1697                 }
1698         }
1699
1700         /**
1701          * Move page to non-existing title.
1702          * @param Title &$nt the new Title
1703          * @param int &$newid set to be the new article ID
1704          * @access private
1705          */
1706         function moveToNewTitle( &$nt, &$newid, $reason = '' ) {
1707                 global $wgUser, $wgLinkCache, $wgUseSquid;
1708                 global $wgMwRedir;
1709                 $fname = 'MovePageForm::moveToNewTitle';
1710                 $comment = wfMsgForContent( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() );
1711                 if ( $reason ) {
1712                         $comment .= ": $reason";
1713                 }
1714
1715                 $newid = $nt->getArticleID();
1716                 $oldid = $this->getArticleID();
1717                 $dbw =& wfGetDB( DB_MASTER );
1718                 $now = $dbw->timestamp();
1719                 wfSeedRandom();
1720                 $rand = wfRandom();
1721
1722                 # Save a null revision in the page's history notifying of the move
1723                 $nullRevision = Revision::newNullRevision( $dbw, $oldid,
1724                         wfMsgForContent( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() ),
1725                         true );
1726                 $nullRevId = $nullRevision->insertOn( $dbw );
1727
1728                 # Rename cur entry
1729                 $dbw->update( 'page',
1730                         /* SET */ array(
1731                                 'page_touched'   => $now,
1732                                 'page_namespace' => $nt->getNamespace(),
1733                                 'page_title'     => $nt->getDBkey(),
1734                                 'page_latest'    => $nullRevId,
1735                         ),
1736                         /* WHERE */ array( 'page_id' => $oldid ),
1737                         $fname
1738                 );
1739
1740                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
1741
1742                 # Insert redirect
1743                 $redirectText = $wgMwRedir->getSynonym( 0 ) . ' [[' . $nt->getPrefixedText() . "]]\n";
1744                 $redirectArticle = new Article( $this );
1745                 $newid = $redirectArticle->insertOn( $dbw );
1746                 $redirectRevision = new Revision( array(
1747                         'page'    => $newid,
1748                         'comment' => $comment,
1749                         'text'    => $redirectText ) );
1750                 $revid = $redirectRevision->insertOn( $dbw );
1751                 $redirectArticle->updateRevisionOn( $dbw, $redirectRevision, 0 );
1752                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
1753
1754                 # Log the move
1755                 $log = new LogPage( 'move' );
1756                 $log->addEntry( 'move', $this, $reason, array( 1 => $nt->getPrefixedText()) );
1757
1758                 # Purge caches as per article creation
1759                 Article::onArticleCreate( $nt );
1760
1761                 # Record the just-created redirect's linking to the page
1762                 $dbw->insert( 'pagelinks',
1763                         array(
1764                                 'pl_from'      => $newid,
1765                                 'pl_namespace' => $nt->getNamespace(),
1766                                 'pl_title'     => $nt->getDBkey() ),
1767                         $fname );
1768
1769                 # Non-existent target may have had broken links to it; these must
1770                 # now be touched to update link coloring.
1771                 $nt->touchLinks();
1772
1773                 # Purge old title from squid
1774                 # The new title, and links to the new title, are purged in Article::onArticleCreate()
1775                 $titles = $nt->getLinksTo();
1776                 if ( $wgUseSquid ) {
1777                         $urls = $this->getSquidURLs();
1778                         foreach ( $titles as $linkTitle ) {
1779                                 $urls[] = $linkTitle->getInternalURL();
1780                         }
1781                         $u = new SquidUpdate( $urls );
1782                         $u->doUpdate();
1783                 }
1784         }
1785
1786         /**
1787          * Checks if $this can be moved to a given Title
1788          * - Selects for update, so don't call it unless you mean business
1789          *
1790          * @param Title &$nt the new title to check
1791          * @access public
1792          */
1793         function isValidMoveTarget( $nt ) {
1794
1795                 $fname = 'Title::isValidMoveTarget';
1796                 $dbw =& wfGetDB( DB_MASTER );
1797
1798                 # Is it a redirect?
1799                 $id  = $nt->getArticleID();
1800                 $obj = $dbw->selectRow( array( 'page', 'revision', 'text'),
1801                         array( 'page_is_redirect','old_text','old_flags' ),
1802                         array( 'page_id' => $id, 'page_latest=rev_id', 'rev_text_id=old_id' ),
1803                         $fname, 'FOR UPDATE' );
1804
1805                 if ( !$obj || 0 == $obj->page_is_redirect ) {
1806                         # Not a redirect
1807                         return false;
1808                 }
1809                 $text = Revision::getRevisionText( $obj );
1810
1811                 # Does the redirect point to the source?
1812                 if ( preg_match( "/\\[\\[\\s*([^\\]\\|]*)]]/", $text, $m ) ) {
1813                         $redirTitle = Title::newFromText( $m[1] );
1814                         if( !is_object( $redirTitle ) ||
1815                                 $redirTitle->getPrefixedDBkey() != $this->getPrefixedDBkey() ) {
1816                                 return false;
1817                         }
1818                 } else {
1819                         # Fail safe
1820                         return false;
1821                 }
1822
1823                 # Does the article have a history?
1824                 $row = $dbw->selectRow( array( 'page', 'revision'),
1825                         array( 'rev_id' ),
1826                         array( 'page_namespace' => $nt->getNamespace(),
1827                                 'page_title' => $nt->getDBkey(),
1828                                 'page_id=rev_page AND page_latest != rev_id'
1829                         ), $fname, 'FOR UPDATE'
1830                 );
1831
1832                 # Return true if there was no history
1833                 return $row === false;
1834         }
1835
1836         /**
1837          * Create a redirect; fails if the title already exists; does
1838          * not notify RC
1839          *
1840          * @param Title $dest the destination of the redirect
1841          * @param string $comment the comment string describing the move
1842          * @return bool true on success
1843          * @access public
1844          */
1845         function createRedirect( $dest, $comment ) {
1846                 global $wgUser;
1847                 if ( $this->getArticleID() ) {
1848                         return false;
1849                 }
1850
1851                 $fname = 'Title::createRedirect';
1852                 $dbw =& wfGetDB( DB_MASTER );
1853
1854                 $article = new Article( $this );
1855                 $newid = $article->insertOn( $dbw );
1856                 $revision = new Revision( array(
1857                         'page'      => $newid,
1858                         'comment'   => $comment,
1859                         'text'      => "#REDIRECT [[" . $dest->getPrefixedText() . "]]\n",
1860                         ) );
1861                 $revisionId = $revision->insertOn( $dbw );
1862                 $article->updateRevisionOn( $dbw, $revision, 0 );
1863
1864                 # Link table
1865                 $dbw->insert( 'pagelinks',
1866                         array(
1867                                 'pl_from'      => $newid,
1868                                 'pl_namespace' => $dest->getNamespace(),
1869                                 'pl_title'     => $dest->getDbKey()
1870                         ), $fname
1871                 );
1872
1873                 Article::onArticleCreate( $this );
1874                 return true;
1875         }
1876
1877         /**
1878          * Get categories to which this Title belongs and return an array of
1879          * categories' names.
1880          *
1881          * @return array an array of parents in the form:
1882          *      $parent => $currentarticle
1883          * @access public
1884          */
1885         function getParentCategories() {
1886                 global $wgContLang,$wgUser;
1887
1888                 $titlekey = $this->getArticleId();
1889                 $sk =& $wgUser->getSkin();
1890                 $parents = array();
1891                 $dbr =& wfGetDB( DB_SLAVE );
1892                 $categorylinks = $dbr->tableName( 'categorylinks' );
1893
1894                 # NEW SQL
1895                 $sql = "SELECT * FROM $categorylinks"
1896                      ." WHERE cl_from='$titlekey'"
1897                          ." AND cl_from <> '0'"
1898                          ." ORDER BY cl_sortkey";
1899
1900                 $res = $dbr->query ( $sql ) ;
1901
1902                 if($dbr->numRows($res) > 0) {
1903                         while ( $x = $dbr->fetchObject ( $res ) )
1904                                 //$data[] = Title::newFromText($wgContLang->getNSText ( NS_CATEGORY ).':'.$x->cl_to);
1905                                 $data[$wgContLang->getNSText ( NS_CATEGORY ).':'.$x->cl_to] = $this->getFullText();
1906                         $dbr->freeResult ( $res ) ;
1907                 } else {
1908                         $data = '';
1909                 }
1910                 return $data;
1911         }
1912
1913         /**
1914          * Get a tree of parent categories
1915          * @param array $children an array with the children in the keys, to check for circular refs
1916          * @return array
1917          * @access public
1918          */
1919         function getParentCategoryTree( $children = array() ) {
1920                 $parents = $this->getParentCategories();
1921
1922                 if($parents != '') {
1923                         foreach($parents as $parent => $current)
1924                         {
1925                                 if ( array_key_exists( $parent, $children ) ) {
1926                                         # Circular reference
1927                                         $stack[$parent] = array();
1928                                 } else {
1929                                         $nt = Title::newFromText($parent);
1930                                         $stack[$parent] = $nt->getParentCategoryTree( $children + array($parent => 1) );
1931                                 }
1932                         }
1933                         return $stack;
1934                 } else {
1935                         return array();
1936                 }
1937         }
1938
1939
1940         /**
1941          * Get an associative array for selecting this title from
1942          * the "cur" table
1943          *
1944          * @return array
1945          * @access public
1946          */
1947         function curCond() {
1948                 wfDebugDieBacktrace( 'curCond called' );
1949                 return array( 'cur_namespace' => $this->mNamespace, 'cur_title' => $this->mDbkeyform );
1950         }
1951
1952         /**
1953          * Get an associative array for selecting this title from the
1954          * "old" table
1955          *
1956          * @return array
1957          * @access public
1958          */
1959         function oldCond() {
1960                 wfDebugDieBacktrace( 'oldCond called' );
1961                 return array( 'old_namespace' => $this->mNamespace, 'old_title' => $this->mDbkeyform );
1962         }
1963
1964         /**
1965          * Get the revision ID of the previous revision
1966          *
1967          * @param integer $revision  Revision ID. Get the revision that was before this one.
1968          * @return interger $oldrevision|false
1969          */
1970         function getPreviousRevisionID( $revision ) {
1971                 $dbr =& wfGetDB( DB_SLAVE );
1972                 return $dbr->selectField( 'revision', 'rev_id',
1973                         'rev_page=' . intval( $this->getArticleId() ) .
1974                         ' AND rev_id<' . intval( $revision ) . ' ORDER BY rev_id DESC' );
1975         }
1976
1977         /**
1978          * Get the revision ID of the next revision
1979          *
1980          * @param integer $revision  Revision ID. Get the revision that was after this one.
1981          * @return interger $oldrevision|false
1982          */
1983         function getNextRevisionID( $revision ) {
1984                 $dbr =& wfGetDB( DB_SLAVE );
1985                 return $dbr->selectField( 'revision', 'rev_id',
1986                         'rev_page=' . intval( $this->getArticleId() ) .
1987                         ' AND rev_id>' . intval( $revision ) . ' ORDER BY rev_id' );
1988         }
1989
1990         /**
1991          * Compare with another title.
1992          *
1993          * @param Title $title
1994          * @return bool
1995          */
1996         function equals( $title ) {
1997                 return $this->getInterwiki() == $title->getInterwiki()
1998                         && $this->getNamespace() == $title->getNamespace()
1999                         && $this->getDbkey() == $title->getDbkey();
2000         }
2001
2002         /**
2003          * Check if page exists
2004          * @return bool
2005          */
2006         function exists() {
2007                 return $this->getArticleId() != 0;
2008         }
2009
2010         /**
2011          * Should a link should be displayed as a known link, just based on its title?
2012          *
2013          * Currently, a self-link with a fragment and special pages are in
2014          * this category. Special pages never exist in the database.
2015          */
2016         function isAlwaysKnown() {
2017                 return  $this->isExternal() || ( 0 == $this->mNamespace && "" == $this->mDbkeyform )
2018                   || NS_SPECIAL == $this->mNamespace;
2019         }
2020
2021         /**
2022          * Update page_touched timestamps on pages linking to this title.
2023          * In principal, this could be backgrounded and could also do squid
2024          * purging.
2025          */
2026         function touchLinks() {
2027                 $fname = 'Title::touchLinks';
2028
2029                 $dbw =& wfGetDB( DB_MASTER );
2030
2031                 $res = $dbw->select( 'pagelinks',
2032                         array( 'pl_from' ),
2033                         array(
2034                                 'pl_namespace' => $this->getNamespace(),
2035                                 'pl_title'     => $this->getDbKey() ),
2036                         $fname );
2037                 if ( 0 == $dbw->numRows( $res ) ) {
2038                         return;
2039                 }
2040
2041                 $arr = array();
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 ?>