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                 global $wgLang, $wgServer;
 165                 $t = new Title();
 166
 167                 # For compatibility with old buggy URLs. "+" is not valid in titles,
 168                 # but some URLs used it as a space replacement and they still come
 169                 # from some external search tools.
 170                 $s = str_replace( '+', ' ', $url );
 171
 172                 $t->mDbkeyform = str_replace( ' ', '_', $s );
 173                 if( $t->secureAndSplit() ) {
 174                         return $t;
 175                 } else {
 176                         return NULL;
 177                 }
 178         }
 179
 180         /**
 181          * Create a new Title from an article ID
 182          *
 183          * @todo This is inefficiently implemented, the page row is requested
 184          *       but not used for anything else
 185          *
 186          * @param int $id the page_id corresponding to the Title to create
 187          * @return Title the new object, or NULL on an error
 188          * @access public
 189          * @static
 190          */
 191         function newFromID( $id ) {
 192                 $fname = 'Title::newFromID';
 193                 $dbr =& wfGetDB( DB_SLAVE );
 194                 $row = $dbr->selectRow( 'page', array( 'page_namespace', 'page_title' ),
 195                         array( 'page_id' => $id ), $fname );
 196                 if ( $row !== false ) {
 197                         $title = Title::makeTitle( $row->page_namespace, $row->page_title );
 198                 } else {
 199                         $title = NULL;
 200                 }
 201                 return $title;
 202         }
 203
 204         /**
 205          * Create a new Title from a namespace index and a DB key.
 206          * It's assumed that $ns and $title are *valid*, for instance when
 207          * they came directly from the database or a special page name.
 208          * For convenience, spaces are converted to underscores so that
 209          * eg user_text fields can be used directly.
 210          *
 211          * @param int $ns the namespace of the article
 212          * @param string $title the unprefixed database key form
 213          * @return Title the new object
 214          * @static
 215          * @access public
 216          */
 217         function &makeTitle( $ns, $title ) {
 218                 $t =& new Title();
 219                 $t->mInterwiki = '';
 220                 $t->mFragment = '';
 221                 $t->mNamespace = intval( $ns );
 222                 $t->mDbkeyform = str_replace( ' ', '_', $title );
 223                 $t->mArticleID = ( $ns >= 0 ) ? -1 : 0;
 224                 $t->mUrlform = wfUrlencode( $t->mDbkeyform );
 225                 $t->mTextform = str_replace( '_', ' ', $title );
 226                 return $t;
 227         }
 228
 229         /**
 230          * Create a new Title frrom a namespace index and a DB key.
 231          * The parameters will be checked for validity, which is a bit slower
 232          * than makeTitle() but safer for user-provided data.
 233          *
 234          * @param int $ns the namespace of the article
 235          * @param string $title the database key form
 236          * @return Title the new object, or NULL on an error
 237          * @static
 238          * @access public
 239          */
 240         function makeTitleSafe( $ns, $title ) {
 241                 $t = new Title();
 242                 $t->mDbkeyform = Title::makeName( $ns, $title );
 243                 if( $t->secureAndSplit() ) {
 244                         return $t;
 245                 } else {
 246                         return NULL;
 247                 }
 248         }
 249
 250         /**
 251          * Create a new Title for the Main Page
 252          *
 253          * @static
 254          * @return Title the new object
 255          * @access public
 256          */
 257         function newMainPage() {
 258                 return Title::newFromText( wfMsgForContent( 'mainpage' ) );
 259         }
 260
 261         /**
 262          * Create a new Title for a redirect
 263          * @param string $text the redirect title text
 264          * @return Title the new object, or NULL if the text is not a
 265          *      valid redirect
 266          * @static
 267          * @access public
 268          */
 269         function newFromRedirect( $text ) {
 270                 global $wgMwRedir;
 271                 $rt = NULL;
 272                 if ( $wgMwRedir->matchStart( $text ) ) {
 273                         if ( preg_match( '/\[{2}(.*?)(?:\||\]{2})/', $text, $m ) ) {
 274                                 # categories are escaped using : for example one can enter:
 275                                 # #REDIRECT [[:Category:Music]]. Need to remove it.
 276                                 if ( substr($m[1],0,1) == ':') {
 277                                         # We don't want to keep the ':'
 278                                         $m[1] = substr( $m[1], 1 );
 279                                 }
 280
 281                                 $rt = Title::newFromText( $m[1] );
 282                                 # Disallow redirects to Special:Userlogout
 283                                 if ( !is_null($rt) && $rt->getNamespace() == NS_SPECIAL && preg_match( '/^Userlogout/i', $rt->getText() ) ) {
 284                                         $rt = NULL;
 285                                 }
 286                         }
 287                 }
 288                 return $rt;
 289         }
 290
 291 #----------------------------------------------------------------------------
 292 #       Static functions
 293 #----------------------------------------------------------------------------
 294
 295         /**
 296          * Get the prefixed DB key associated with an ID
 297          * @param int $id the page_id of the article
 298          * @return Title an object representing the article, or NULL
 299          *      if no such article was found
 300          * @static
 301          * @access public
 302          */
 303         function nameOf( $id ) {
 304                 $fname = 'Title::nameOf';
 305                 $dbr =& wfGetDB( DB_SLAVE );
 306
 307                 $s = $dbr->selectRow( 'page', array( 'page_namespace','page_title' ),  array( 'page_id' => $id ), $fname );
 308                 if ( $s === false ) { return NULL; }
 309
 310                 $n = Title::makeName( $s->page_namespace, $s->page_title );
 311                 return $n;
 312         }
 313
 314         /**
 315          * Get a regex character class describing the legal characters in a link
 316          * @return string the list of characters, not delimited
 317          * @static
 318          * @access public
 319          */
 320         function legalChars() {
 321                 global $wgLegalTitleChars;
 322                 return $wgLegalTitleChars;
 323         }
 324
 325         /**
 326          * Get a string representation of a title suitable for
 327          * including in a search index
 328          *
 329          * @param int $ns a namespace index
 330          * @param string $title text-form main part
 331          * @return string a stripped-down title string ready for the
 332          *      search index
 333          */
 334         /* static */ function indexTitle( $ns, $title ) {
 335                 global $wgDBminWordLen, $wgContLang;
 336                 require_once( 'SearchEngine.php' );
 337
 338                 $lc = SearchEngine::legalSearchChars() . '&#;';
 339                 $t = $wgContLang->stripForSearch( $title );
 340                 $t = preg_replace( "/[^{$lc}]+/", ' ', $t );
 341                 $t = strtolower( $t );
 342
 343                 # Handle 's, s'
 344                 $t = preg_replace( "/([{$lc}]+)'s( |$)/", "\\1 \\1's ", $t );
 345                 $t = preg_replace( "/([{$lc}]+)s'( |$)/", "\\1s ", $t );
 346
 347                 $t = preg_replace( "/\\s+/", ' ', $t );
 348
 349                 if ( $ns == NS_IMAGE ) {
 350                         $t = preg_replace( "/ (png|gif|jpg|jpeg|ogg)$/", "", $t );
 351                 }
 352                 return trim( $t );
 353         }
 354
 355         /*
 356          * Make a prefixed DB key from a DB key and a namespace index
 357          * @param int $ns numerical representation of the namespace
 358          * @param string $title the DB key form the title
 359          * @return string the prefixed form of the title
 360          */
 361         /* static */ function makeName( $ns, $title ) {
 362                 global $wgContLang;
 363
 364                 $n = $wgContLang->getNsText( $ns );
 365                 return $n == '' ? $title : "$n:$title";
 366         }
 367
 368         /**
 369          * Returns the URL associated with an interwiki prefix
 370          * @param string $key the interwiki prefix (e.g. "MeatBall")
 371          * @return the associated URL, containing "$1", which should be
 372          *      replaced by an article title
 373          * @static (arguably)
 374          * @access public
 375          */
 376         function getInterwikiLink( $key, $transludeonly = false ) {
 377                 global $wgMemc, $wgDBname, $wgInterwikiExpiry, $wgTitleInterwikiCache;
 378                 $fname = 'Title::getInterwikiLink';
 379
 380                 wfProfileIn( $fname );
 381
 382                 $key = strtolower( $key );
 383
 384                 $k = $wgDBname.':interwiki:'.$key;
 385                 if( array_key_exists( $k, $wgTitleInterwikiCache ) ) {
 386                         wfProfileOut( $fname );
 387                         return $wgTitleInterwikiCache[$k]->iw_url;
 388                 }
 389
 390                 $s = $wgMemc->get( $k );
 391                 # Ignore old keys with no iw_local
 392                 if( $s && isset( $s->iw_local ) && isset($s->iw_trans)) {
 393                         $wgTitleInterwikiCache[$k] = $s;
 394                         wfProfileOut( $fname );
 395                         return $s->iw_url;
 396                 }
 397
 398                 $dbr =& wfGetDB( DB_SLAVE );
 399                 $res = $dbr->select( 'interwiki',
 400                         array( 'iw_url', 'iw_local', 'iw_trans' ),
 401                         array( 'iw_prefix' => $key ), $fname );
 402                 if( !$res ) {
 403                         wfProfileOut( $fname );
 404                         return '';
 405                 }
 406
 407                 $s = $dbr->fetchObject( $res );
 408                 if( !$s ) {
 409                         # Cache non-existence: create a blank object and save it to memcached
 410                         $s = (object)false;
 411                         $s->iw_url = '';
 412                         $s->iw_local = 0;
 413                         $s->iw_trans = 0;
 414                 }
 415                 $wgMemc->set( $k, $s, $wgInterwikiExpiry );
 416                 $wgTitleInterwikiCache[$k] = $s;
 417
 418                 wfProfileOut( $fname );
 419                 return $s->iw_url;
 420         }
 421
 422         /**
 423          * Determine whether the object refers to a page within
 424          * this project.
 425          *
 426          * @return bool TRUE if this is an in-project interwiki link
 427          *      or a wikilink, FALSE otherwise
 428          * @access public
 429          */
 430         function isLocal() {
 431                 global $wgTitleInterwikiCache, $wgDBname;
 432
 433                 if ( $this->mInterwiki != '' ) {
 434                         # Make sure key is loaded into cache
 435                         $this->getInterwikiLink( $this->mInterwiki );
 436                         $k = $wgDBname.':interwiki:' . $this->mInterwiki;
 437                         return (bool)($wgTitleInterwikiCache[$k]->iw_local);
 438                 } else {
 439                         return true;
 440                 }
 441         }
 442
 443         /**
 444          * Determine whether the object refers to a page within
 445          * this project and is transcludable.
 446          *
 447          * @return bool TRUE if this is transcludable
 448          * @access public
 449          */
 450         function isTrans() {
 451                 global $wgTitleInterwikiCache, $wgDBname;
 452
 453                 if ($this->mInterwiki == '' || !$this->isLocal())
 454                         return false;
 455                 # Make sure key is loaded into cache
 456                 $this->getInterwikiLink( $this->mInterwiki );
 457                 $k = $wgDBname.':interwiki:' . $this->mInterwiki;
 458                 return (bool)($wgTitleInterwikiCache[$k]->iw_trans);
 459         }
 460
 461         /**
 462          * Update the page_touched field for an array of title objects
 463          * @todo Inefficient unless the IDs are already loaded into the
 464          *      link cache
 465          * @param array $titles an array of Title objects to be touched
 466          * @param string $timestamp the timestamp to use instead of the
 467          *      default current time
 468          * @static
 469          * @access public
 470          */
 471         function touchArray( $titles, $timestamp = '' ) {
 472                 global $wgUseFileCache;
 473
 474                 if ( count( $titles ) == 0 ) {
 475                         return;
 476                 }
 477                 $dbw =& wfGetDB( DB_MASTER );
 478                 if ( $timestamp == '' ) {
 479                         $timestamp = $dbw->timestamp();
 480                 }
 481                 $page = $dbw->tableName( 'page' );
 482                 /*
 483                 $sql = "UPDATE $page SET page_touched='{$timestamp}' WHERE page_id IN (";
 484                 $first = true;
 485
 486                 foreach ( $titles as $title ) {
 487                         if ( $wgUseFileCache ) {
 488                                 $cm = new CacheManager($title);
 489                                 @unlink($cm->fileCacheName());
 490                         }
 491
 492                         if ( ! $first ) {
 493                                 $sql .= ',';
 494                         }
 495                         $first = false;
 496                         $sql .= $title->getArticleID();
 497                 }
 498                 $sql .= ')';
 499                 if ( ! $first ) {
 500                         $dbw->query( $sql, 'Title::touchArray' );
 501                 }
 502                 */
 503                 // hack hack hack -- brion 2005-07-11. this was unfriendly to db.
 504                 // do them in small chunks:
 505                 $fname = 'Title::touchArray';
 506                 foreach( $titles as $title ) {
 507                         $dbw->update( 'page',
 508                                 array( 'page_touched' => $timestamp ),
 509                                 array(
 510                                         'page_namespace' => $title->getNamespace(),
 511                                         'page_title'     => $title->getDBkey() ),
 512                                 $fname );
 513                 }
 514         }
 515
 516 #----------------------------------------------------------------------------
 517 #       Other stuff
 518 #----------------------------------------------------------------------------
 519
 520         /** Simple accessors */
 521         /**
 522          * Get the text form (spaces not underscores) of the main part
 523          * @return string
 524          * @access public
 525          */
 526         function getText() { return $this->mTextform; }
 527         /**
 528          * Get the URL-encoded form of the main part
 529          * @return string
 530          * @access public
 531          */
 532         function getPartialURL() { return $this->mUrlform; }
 533         /**
 534          * Get the main part with underscores
 535          * @return string
 536          * @access public
 537          */
 538         function getDBkey() { return $this->mDbkeyform; }
 539         /**
 540          * Get the namespace index, i.e. one of the NS_xxxx constants
 541          * @return int
 542          * @access public
 543          */
 544         function getNamespace() { return $this->mNamespace; }
 545         /**
 546          * Get the namespace text
 547          * @return string
 548          * @access public
 549          */
 550         function getNsText() {
 551                 global $wgContLang;
 552                 return $wgContLang->getNsText( $this->mNamespace );
 553         }
 554         /**
 555          * Get the namespace text of the subject (rather than talk) page
 556          * @return string
 557          * @access public
 558          */
 559         function getSubjectNsText() {
 560                 global $wgContLang;
 561                 return $wgContLang->getNsText( Namespace::getSubject( $this->mNamespace ) );
 562         }
 563
 564         /**
 565          * Get the interwiki prefix (or null string)
 566          * @return string
 567          * @access public
 568          */
 569         function getInterwiki() { return $this->mInterwiki; }
 570         /**
 571          * Get the Title fragment (i.e. the bit after the #)
 572          * @return string
 573          * @access public
 574          */
 575         function getFragment() { return $this->mFragment; }
 576         /**
 577          * Get the default namespace index, for when there is no namespace
 578          * @return int
 579          * @access public
 580          */
 581         function getDefaultNamespace() { return $this->mDefaultNamespace; }
 582
 583         /**
 584          * Get title for search index
 585          * @return string a stripped-down title string ready for the
 586          *      search index
 587          */
 588         function getIndexTitle() {
 589                 return Title::indexTitle( $this->mNamespace, $this->mTextform );
 590         }
 591
 592         /**
 593          * Get the prefixed database key form
 594          * @return string the prefixed title, with underscores and
 595          *      any interwiki and namespace prefixes
 596          * @access public
 597          */
 598         function getPrefixedDBkey() {
 599                 $s = $this->prefix( $this->mDbkeyform );
 600                 $s = str_replace( ' ', '_', $s );
 601                 return $s;
 602         }
 603
 604         /**
 605          * Get the prefixed title with spaces.
 606          * This is the form usually used for display
 607          * @return string the prefixed title, with spaces
 608          * @access public
 609          */
 610         function getPrefixedText() {
 611                 global $wgContLang;
 612                 if ( empty( $this->mPrefixedText ) ) { // FIXME: bad usage of empty() ?
 613                         $s = $this->prefix( $this->mTextform );
 614                         $s = str_replace( '_', ' ', $s );
 615                         $this->mPrefixedText = $s;
 616                 }
 617                 return $this->mPrefixedText;
 618         }
 619
 620         /**
 621          * Get the prefixed title with spaces, plus any fragment
 622          * (part beginning with '#')
 623          * @return string the prefixed title, with spaces and
 624          *      the fragment, including '#'
 625          * @access public
 626          */
 627         function getFullText() {
 628                 global $wgContLang;
 629                 $text = $this->getPrefixedText();
 630                 if( '' != $this->mFragment ) {
 631                         $text .= '#' . $this->mFragment;
 632                 }
 633                 return $text;
 634         }
 635
 636         /**
 637          * Get a URL-encoded title (not an actual URL) including interwiki
 638          * @return string the URL-encoded form
 639          * @access public
 640          */
 641         function getPrefixedURL() {
 642                 $s = $this->prefix( $this->mDbkeyform );
 643                 $s = str_replace( ' ', '_', $s );
 644
 645                 $s = wfUrlencode ( $s ) ;
 646
 647                 # Cleaning up URL to make it look nice -- is this safe?
 648                 $s = str_replace( '%28', '(', $s );
 649                 $s = str_replace( '%29', ')', $s );
 650
 651                 return $s;
 652         }
 653
 654         /**
 655          * Get a real URL referring to this title, with interwiki link and
 656          * fragment
 657          *
 658          * @param string $query an optional query string, not used
 659          *      for interwiki links
 660          * @return string the URL
 661          * @access public
 662          */
 663         function getFullURL( $query = '' ) {
 664                 global $wgContLang, $wgServer;
 665
 666                 if ( '' == $this->mInterwiki ) {
 667                         $url = $wgServer . $this->getLocalUrl( $query );
 668                 } else {
 669                         $baseUrl = $this->getInterwikiLink( $this->mInterwiki );
 670
 671                         $namespace = $wgContLang->getNsText( $this->mNamespace );
 672                         if ( '' != $namespace ) {
 673                                 # Can this actually happen? Interwikis shouldn't be parsed.
 674                                 $namespace .= ':';
 675                         }
 676                         $url = str_replace( '$1', $namespace . $this->mUrlform, $baseUrl );
 677                         if( $query != '' ) {
 678                                 if( false === strpos( $url, '?' ) ) {
 679                                         $url .= '?';
 680                                 } else {
 681                                         $url .= '&';
 682                                 }
 683                                 $url .= $query;
 684                         }
 685                         if ( '' != $this->mFragment ) {
 686                                 $url .= '#' . $this->mFragment;
 687                         }
 688                 }
 689                 wfRunHooks( 'GetFullURL', array( &$this, &$url, $query ) );
 690                 return $url;
 691         }
 692
 693         /**
 694          * Get a URL with no fragment or server name.  If this page is generated
 695          * with action=render, $wgServer is prepended.
 696          * @param string $query an optional query string; if not specified,
 697          *      $wgArticlePath will be used.
 698          * @return string the URL
 699          * @access public
 700          */
 701         function getLocalURL( $query = '' ) {
 702                 global $wgArticlePath, $wgScript, $wgServer, $wgRequest;
 703
 704                 if ( $this->isExternal() ) {
 705                         $url = $this->getFullURL();
 706                 } else {
 707                         $dbkey = wfUrlencode( $this->getPrefixedDBkey() );
 708                         if ( $query == '' ) {
 709                                 $url = str_replace( '$1', $dbkey, $wgArticlePath );
 710                         } else {
 711                                 global $wgActionPaths;
 712                                 $url = false;
 713                                 if( !empty( $wgActionPaths ) &&
 714                                         preg_match( '/^(.*&|)action=([^&]*)(&(.*)|)$/', $query, $matches ) )
 715                                 {
 716                                         $action = urldecode( $matches[2] );
 717                                         if( isset( $wgActionPaths[$action] ) ) {
 718                                                 $query = $matches[1];
 719                                                 if( isset( $matches[4] ) ) $query .= $matches[4];
 720                                                 $url = str_replace( '$1', $dbkey, $wgActionPaths[$action] );
 721                                                 if( $query != '' ) $url .= '?' . $query;
 722                                         }
 723                                 }
 724                                 if ( $url === false ) {
 725                                         if ( $query == '-' ) {
 726                                                 $query = '';
 727                                         }
 728                                         $url = "{$wgScript}?title={$dbkey}&{$query}";
 729                                 }
 730                         }
 731
 732                         if ($wgRequest->getText('action') == 'render') {
 733                                 $url = $wgServer . $url;
 734                         }
 735                 }
 736                 wfRunHooks( 'GetLocalURL', array( &$this, &$url, $query ) );
 737                 return $url;
 738         }
 739
 740         /**
 741          * Get an HTML-escaped version of the URL form, suitable for
 742          * using in a link, without a server name or fragment
 743          * @param string $query an optional query string
 744          * @return string the URL
 745          * @access public
 746          */
 747         function escapeLocalURL( $query = '' ) {
 748                 return htmlspecialchars( $this->getLocalURL( $query ) );
 749         }
 750
 751         /**
 752          * Get an HTML-escaped version of the URL form, suitable for
 753          * using in a link, including the server name and fragment
 754          *
 755          * @return string the URL
 756          * @param string $query an optional query string
 757          * @access public
 758          */
 759         function escapeFullURL( $query = '' ) {
 760                 return htmlspecialchars( $this->getFullURL( $query ) );
 761         }
 762
 763         /**
 764          * Get the URL form for an internal link.
 765          * - Used in various Squid-related code, in case we have a different
 766          * internal hostname for the server from the exposed one.
 767          *
 768          * @param string $query an optional query string
 769          * @return string the URL
 770          * @access public
 771          */
 772         function getInternalURL( $query = '' ) {
 773                 global $wgInternalServer;
 774                 return $wgInternalServer . $this->getLocalURL( $query );
 775         }
 776
 777         /**
 778          * Get the edit URL for this Title
 779          * @return string the URL, or a null string if this is an
 780          *      interwiki link
 781          * @access public
 782          */
 783         function getEditURL() {
 784                 global $wgServer, $wgScript;
 785
 786                 if ( '' != $this->mInterwiki ) { return ''; }
 787                 $s = $this->getLocalURL( 'action=edit' );
 788
 789                 return $s;
 790         }
 791
 792         /**
 793          * Get the HTML-escaped displayable text form.
 794          * Used for the title field in <a> tags.
 795          * @return string the text, including any prefixes
 796          * @access public
 797          */
 798         function getEscapedText() {
 799                 return htmlspecialchars( $this->getPrefixedText() );
 800         }
 801
 802         /**
 803          * Is this Title interwiki?
 804          * @return boolean
 805          * @access public
 806          */
 807         function isExternal() { return ( '' != $this->mInterwiki ); }
 808
 809         /**
 810          * Does the title correspond to a protected article?
 811          * @param string $what the action the page is protected from,
 812          *      by default checks move and edit
 813          * @return boolean
 814          * @access public
 815          */
 816         function isProtected($action = '') {
 817                 if ( -1 == $this->mNamespace ) { return true; }
 818                 if($action == 'edit' || $action == '') {
 819                         $a = $this->getRestrictions("edit");
 820                         if ( in_array( 'sysop', $a ) ) { return true; }
 821                 }
 822                 if($action == 'move' || $action == '') {
 823                         $a = $this->getRestrictions("move");
 824                         if ( in_array( 'sysop', $a ) ) { return true; }
 825                 }
 826                 return false;
 827         }
 828
 829         /**
 830          * Is $wgUser is watching this page?
 831          * @return boolean
 832          * @access public
 833          */
 834         function userIsWatching() {
 835                 global $wgUser;
 836
 837                 if ( is_null( $this->mWatched ) ) {
 838                         if ( -1 == $this->mNamespace || 0 == $wgUser->getID()) {
 839                                 $this->mWatched = false;
 840                         } else {
 841                                 $this->mWatched = $wgUser->isWatched( $this );
 842                         }
 843                 }
 844                 return $this->mWatched;
 845         }
 846
 847         /**
 848          * Can $wgUser perform $action this page?
 849          * @param string $action action that permission needs to be checked for
 850          * @return boolean
 851          * @access private
 852          */
 853         function userCan($action) {
 854                 $fname = 'Title::userCan';
 855                 wfProfileIn( $fname );
 856
 857                 global $wgUser;
 858                 if( NS_SPECIAL == $this->mNamespace ) {
 859                         wfProfileOut( $fname );
 860                         return false;
 861                 }
 862                 // XXX: This is the code that prevents unprotecting a page in NS_MEDIAWIKI
 863                 // from taking effect -ævar
 864                 if( NS_MEDIAWIKI == $this->mNamespace &&
 865                     !$wgUser->isAllowed('editinterface') ) {
 866                         wfProfileOut( $fname );
 867                         return false;
 868                 }
 869
 870                 if( $this->mDbkeyform == '_' ) {
 871                         # FIXME: Is this necessary? Shouldn't be allowed anyway...
 872                         wfProfileOut( $fname );
 873                         return false;
 874                 }
 875
 876                 # protect global styles and js
 877                 if ( NS_MEDIAWIKI == $this->mNamespace
 878                  && preg_match("/\\.(css|js)$/", $this->mTextform )
 879                      && !$wgUser->isAllowed('editinterface') ) {
 880                         wfProfileOut( $fname );
 881                         return false;
 882                 }
 883
 884                 # protect css/js subpages of user pages
 885                 # XXX: this might be better using restrictions
 886                 # XXX: Find a way to work around the php bug that prevents using $this->userCanEditCssJsSubpage() from working
 887                 if( NS_USER == $this->mNamespace
 888                         && preg_match("/\\.(css|js)$/", $this->mTextform )
 889                         && !$wgUser->isAllowed('editinterface')
 890                         && !preg_match('/^'.preg_quote($wgUser->getName(), '/').'\//', $this->mTextform) ) {
 891                         wfProfileOut( $fname );
 892                         return false;
 893                 }
 894
 895                 foreach( $this->getRestrictions($action) as $right ) {
 896                         // Backwards compatibility, rewrite sysop -> protect
 897                         if ( $right == 'sysop' ) {
 898                                 $right = 'protect';
 899                         }
 900                         if( '' != $right && !$wgUser->isAllowed( $right ) ) {
 901                                 wfProfileOut( $fname );
 902                                 return false;
 903                         }
 904                 }
 905
 906                 if( $action == 'move' &&
 907                         !( $this->isMovable() && $wgUser->isAllowed( 'move' ) ) ) {
 908                         wfProfileOut( $fname );
 909                         return false;
 910                 }
 911
 912                 wfProfileOut( $fname );
 913                 return true;
 914         }
 915
 916         /**
 917          * Can $wgUser edit this page?
 918          * @return boolean
 919          * @access public
 920          */
 921         function userCanEdit() {
 922                 return $this->userCan('edit');
 923         }
 924
 925         /**
 926          * Can $wgUser move this page?
 927          * @return boolean
 928          * @access public
 929          */
 930         function userCanMove() {
 931                 return $this->userCan('move');
 932         }
 933
 934         /**
 935          * Would anybody with sufficient privileges be able to move this page?
 936          * Some pages just aren't movable.
 937          *
 938          * @return boolean
 939          * @access public
 940          */
 941         function isMovable() {
 942                 return Namespace::isMovable( $this->getNamespace() )
 943                         && $this->getInterwiki() == '';
 944         }
 945
 946         /**
 947          * Can $wgUser read this page?
 948          * @return boolean
 949          * @access public
 950          */
 951         function userCanRead() {
 952                 global $wgUser;
 953
 954                 if( $wgUser->isAllowed('read') ) {
 955                         return true;
 956                 } else {
 957                         global $wgWhitelistRead;
 958
 959                         /** If anon users can create an account,
 960                             they need to reach the login page first! */
 961                         if( $wgUser->isAllowed( 'createaccount' )
 962                             && $this->getNamespace() == NS_SPECIAL
 963                             && $this->getText() == 'Userlogin' ) {
 964                                 return true;
 965                         }
 966
 967                         /** some pages are explicitly allowed */
 968                         $name = $this->getPrefixedText();
 969                         if( $wgWhitelistRead && in_array( $name, $wgWhitelistRead ) ) {
 970                                 return true;
 971                         }
 972
 973                         # Compatibility with old settings
 974                         if( $wgWhitelistRead && $this->getNamespace() == NS_MAIN ) {
 975                                 if( in_array( ':' . $name, $wgWhitelistRead ) ) {
 976                                         return true;
 977                                 }
 978                         }
 979                 }
 980                 return false;
 981         }
 982
 983         /**
 984          * Is this a talk page of some sort?
 985          * @return bool
 986          * @access public
 987          */
 988         function isTalkPage() {
 989                 return Namespace::isTalk( $this->getNamespace() );
 990         }
 991
 992         /**
 993          * Is this a .css or .js subpage of a user page?
 994          * @return bool
 995          * @access public
 996          */
 997         function isCssJsSubpage() {
 998                 return ( NS_USER == $this->mNamespace and preg_match("/\\.(css|js)$/", $this->mTextform ) );
 999         }
1000         /**
1001          * Is this a .css subpage of a user page?
1002          * @return bool
1003          * @access public
1004          */
1005         function isCssSubpage() {
1006                 return ( NS_USER == $this->mNamespace and preg_match("/\\.css$/", $this->mTextform ) );
1007         }
1008         /**
1009          * Is this a .js subpage of a user page?
1010          * @return bool
1011          * @access public
1012          */
1013         function isJsSubpage() {
1014                 return ( NS_USER == $this->mNamespace and preg_match("/\\.js$/", $this->mTextform ) );
1015         }
1016         /**
1017          * Protect css/js subpages of user pages: can $wgUser edit
1018          * this page?
1019          *
1020          * @return boolean
1021          * @todo XXX: this might be better using restrictions
1022          * @access public
1023          */
1024         function userCanEditCssJsSubpage() {
1025                 global $wgUser;
1026                 return ( $wgUser->isAllowed('editinterface') or preg_match('/^'.preg_quote($wgUser->getName(), '/').'\//', $this->mTextform) );
1027         }
1028
1029         /**
1030          * Loads a string into mRestrictions array
1031          * @param string $res restrictions in string format
1032          * @access public
1033          */
1034         function loadRestrictions( $res ) {
1035                 foreach( explode( ':', trim( $res ) ) as $restrict ) {
1036                         $temp = explode( '=', trim( $restrict ) );
1037                         if(count($temp) == 1) {
1038                                 // old format should be treated as edit/move restriction
1039                                 $this->mRestrictions["edit"] = explode( ',', trim( $temp[0] ) );
1040                                 $this->mRestrictions["move"] = explode( ',', trim( $temp[0] ) );
1041                         } else {
1042                                 $this->mRestrictions[$temp[0]] = explode( ',', trim( $temp[1] ) );
1043                         }
1044                 }
1045                 $this->mRestrictionsLoaded = true;
1046         }
1047
1048         /**
1049          * Accessor/initialisation for mRestrictions
1050          * @param string $action action that permission needs to be checked for
1051          * @return array the array of groups allowed to edit this article
1052          * @access public
1053          */
1054         function getRestrictions($action) {
1055                 $id = $this->getArticleID();
1056                 if ( 0 == $id ) { return array(); }
1057
1058                 if ( ! $this->mRestrictionsLoaded ) {
1059                         $dbr =& wfGetDB( DB_SLAVE );
1060                         $res = $dbr->selectField( 'page', 'page_restrictions', 'page_id='.$id );
1061                         $this->loadRestrictions( $res );
1062                 }
1063                 if( isset( $this->mRestrictions[$action] ) ) {
1064                         return $this->mRestrictions[$action];
1065                 }
1066                 return array();
1067         }
1068
1069         /**
1070          * Is there a version of this page in the deletion archive?
1071          * @return int the number of archived revisions
1072          * @access public
1073          */
1074         function isDeleted() {
1075                 $fname = 'Title::isDeleted';
1076                 if ( $this->getNamespace() < 0 ) {
1077                         $n = 0;
1078                 } else {
1079                         $dbr =& wfGetDB( DB_SLAVE );
1080                         $n = $dbr->selectField( 'archive', 'COUNT(*)', array( 'ar_namespace' => $this->getNamespace(),
1081                                 'ar_title' => $this->getDBkey() ), $fname );
1082                 }
1083                 return (int)$n;
1084         }
1085
1086         /**
1087          * Get the article ID for this Title from the link cache,
1088          * adding it if necessary
1089          * @param int $flags a bit field; may be GAID_FOR_UPDATE to select
1090          *      for update
1091          * @return int the ID
1092          * @access public
1093          */
1094         function getArticleID( $flags = 0 ) {
1095                 global $wgLinkCache;
1096                 if ( $flags & GAID_FOR_UPDATE ) {
1097                         $oldUpdate = $wgLinkCache->forUpdate( true );
1098                         $this->mArticleID = $wgLinkCache->addLinkObj( $this );
1099                         $wgLinkCache->forUpdate( $oldUpdate );
1100                 } else {
1101                         if ( -1 == $this->mArticleID ) {
1102                                 $this->mArticleID = $wgLinkCache->addLinkObj( $this );
1103                         }
1104                 }
1105                 return $this->mArticleID;
1106         }
1107
1108         function getLatestRevID() {
1109                 if ($this->mLatestID !== false)
1110                         return $this->mLatestID;
1111
1112                 $db =& wfGetDB(DB_SLAVE);
1113                 return $this->mLatestID = $db->selectField( 'revision',
1114                         "max(rev_id)",
1115                         array('rev_page' => $this->getArticleID()),
1116                         'Title::getLatestRevID' );
1117         }
1118
1119         /**
1120          * This clears some fields in this object, and clears any associated
1121          * keys in the "bad links" section of $wgLinkCache.
1122          *
1123          * - This is called from Article::insertNewArticle() to allow
1124          * loading of the new page_id. It's also called from
1125          * Article::doDeleteArticle()
1126          *
1127          * @param int $newid the new Article ID
1128          * @access public
1129          */
1130         function resetArticleID( $newid ) {
1131                 global $wgLinkCache;
1132                 $wgLinkCache->clearBadLink( $this->getPrefixedDBkey() );
1133
1134                 if ( 0 == $newid ) { $this->mArticleID = -1; }
1135                 else { $this->mArticleID = $newid; }
1136                 $this->mRestrictionsLoaded = false;
1137                 $this->mRestrictions = array();
1138         }
1139
1140         /**
1141          * Updates page_touched for this page; called from LinksUpdate.php
1142          * @return bool true if the update succeded
1143          * @access public
1144          */
1145         function invalidateCache() {
1146                 global $wgUseFileCache;
1147
1148                 if ( wfReadOnly() ) {
1149                         return;
1150                 }
1151
1152                 $now = wfTimestampNow();
1153                 $dbw =& wfGetDB( DB_MASTER );
1154                 $success = $dbw->update( 'page',
1155                         array( /* SET */
1156                                 'page_touched' => $dbw->timestamp()
1157                         ), array( /* WHERE */
1158                                 'page_namespace' => $this->getNamespace() ,
1159                                 'page_title' => $this->getDBkey()
1160                         ), 'Title::invalidateCache'
1161                 );
1162
1163                 if ($wgUseFileCache) {
1164                         $cache = new CacheManager($this);
1165                         @unlink($cache->fileCacheName());
1166                 }
1167
1168                 return $success;
1169         }
1170
1171         /**
1172          * Prefix some arbitrary text with the namespace or interwiki prefix
1173          * of this object
1174          *
1175          * @param string $name the text
1176          * @return string the prefixed text
1177          * @access private
1178          */
1179         /* private */ function prefix( $name ) {
1180                 global $wgContLang;
1181
1182                 $p = '';
1183                 if ( '' != $this->mInterwiki ) {
1184                         $p = $this->mInterwiki . ':';
1185                 }
1186                 if ( 0 != $this->mNamespace ) {
1187                         $p .= $wgContLang->getNsText( $this->mNamespace ) . ':';
1188                 }
1189                 return $p . $name;
1190         }
1191
1192         /**
1193          * Secure and split - main initialisation function for this object
1194          *
1195          * Assumes that mDbkeyform has been set, and is urldecoded
1196          * and uses underscores, but not otherwise munged.  This function
1197          * removes illegal characters, splits off the interwiki and
1198          * namespace prefixes, sets the other forms, and canonicalizes
1199          * everything.
1200          * @return bool true on success
1201          * @access private
1202          */
1203         /* private */ function secureAndSplit() {
1204                 global $wgContLang, $wgLocalInterwiki, $wgCapitalLinks;
1205                 $fname = 'Title::secureAndSplit';
1206                 wfProfileIn( $fname );
1207
1208                 # Initialisation
1209                 static $rxTc = false;
1210                 if( !$rxTc ) {
1211                         # % is needed as well
1212                         $rxTc = '/[^' . Title::legalChars() . ']|%[0-9A-Fa-f]{2}/S';
1213                 }
1214
1215                 $this->mInterwiki = $this->mFragment = '';
1216                 $this->mNamespace = $this->mDefaultNamespace; # Usually NS_MAIN
1217
1218                 # Clean up whitespace
1219                 #
1220                 $t = preg_replace( '/[ _]+/', '_', $this->mDbkeyform );
1221                 $t = trim( $t, '_' );
1222
1223                 if ( '' == $t ) {
1224                         wfProfileOut( $fname );
1225                         return false;
1226                 }
1227
1228                 if( false !== strpos( $t, UTF8_REPLACEMENT ) ) {
1229                         # Contained illegal UTF-8 sequences or forbidden Unicode chars.
1230                         wfProfileOut( $fname );
1231                         return false;
1232                 }
1233
1234                 $this->mDbkeyform = $t;
1235
1236                 # Initial colon indicates main namespace rather than specified default
1237                 # but should not create invalid {ns,title} pairs such as {0,Project:Foo}
1238                 if ( ':' == $t{0} ) {
1239                         $this->mNamespace = NS_MAIN;
1240                         $t = substr( $t, 1 ); # remove the colon but continue processing
1241                 }
1242
1243                 # Namespace or interwiki prefix
1244                 $firstPass = true;
1245                 do {
1246                         if ( preg_match( "/^(.+?)_*:_*(.*)$/S", $t, $m ) ) {
1247                                 $p = $m[1];
1248                                 $lowerNs = strtolower( $p );
1249                                 if ( $ns = Namespace::getCanonicalIndex( $lowerNs ) ) {
1250                                         # Canonical namespace
1251                                         $t = $m[2];
1252                                         $this->mNamespace = $ns;
1253                                 } elseif ( $ns = $wgContLang->getNsIndex( $lowerNs )) {
1254                                         # Ordinary namespace
1255                                         $t = $m[2];
1256                                         $this->mNamespace = $ns;
1257                                 } elseif( $this->getInterwikiLink( $p ) ) {
1258                                         if( !$firstPass ) {
1259                                                 # Can't make a local interwiki link to an interwiki link.
1260                                                 # That's just crazy!
1261                                                 wfProfileOut( $fname );
1262                                                 return false;
1263                                         }
1264
1265                                         # Interwiki link
1266                                         $t = $m[2];
1267                                         $this->mInterwiki = strtolower( $p );
1268
1269                                         # Redundant interwiki prefix to the local wiki
1270                                         if ( 0 == strcasecmp( $this->mInterwiki, $wgLocalInterwiki ) ) {
1271                                                 if( $t == '' ) {
1272                                                         # Can't have an empty self-link
1273                                                         wfProfileOut( $fname );
1274                                                         return false;
1275                                                 }
1276                                                 $this->mInterwiki = '';
1277                                                 $firstPass = false;
1278                                                 # Do another namespace split...
1279                                                 continue;
1280                                         }
1281                                 }
1282                                 # If there's no recognized interwiki or namespace,
1283                                 # then let the colon expression be part of the title.
1284                         }
1285                         break;
1286                 } while( true );
1287                 $r = $t;
1288
1289                 # We already know that some pages won't be in the database!
1290                 #
1291                 if ( '' != $this->mInterwiki || -1 == $this->mNamespace ) {
1292                         $this->mArticleID = 0;
1293                 }
1294                 $f = strstr( $r, '#' );
1295                 if ( false !== $f ) {
1296                         $this->mFragment = substr( $f, 1 );
1297                         $r = substr( $r, 0, strlen( $r ) - strlen( $f ) );
1298                         # remove whitespace again: prevents "Foo_bar_#"
1299                         # becoming "Foo_bar_"
1300                         $r = preg_replace( '/_*$/', '', $r );
1301                 }
1302
1303                 # Reject illegal characters.
1304                 #
1305                 if( preg_match( $rxTc, $r ) ) {
1306                         wfProfileOut( $fname );
1307                         return false;
1308                 }
1309
1310                 /**
1311                  * Pages with "/./" or "/../" appearing in the URLs will
1312                  * often be unreachable due to the way web browsers deal
1313                  * with 'relative' URLs. Forbid them explicitly.
1314                  */
1315                 if ( strpos( $r, '.' ) !== false &&
1316                      ( $r === '.' || $r === '..' ||
1317                        strpos( $r, './' ) === 0  ||
1318                        strpos( $r, '../' ) === 0 ||
1319                        strpos( $r, '/./' ) !== false ||
1320                        strpos( $r, '/../' ) !== false ) )
1321                 {
1322                         wfProfileOut( $fname );
1323                         return false;
1324                 }
1325
1326                 # We shouldn't need to query the DB for the size.
1327                 #$maxSize = $dbr->textFieldSize( 'page', 'page_title' );
1328                 if ( strlen( $r ) > 255 ) {
1329                         wfProfileOut( $fname );
1330                         return false;
1331                 }
1332
1333                 /**
1334                  * Normally, all wiki links are forced to have
1335                  * an initial capital letter so [[foo]] and [[Foo]]
1336                  * point to the same place.
1337                  *
1338                  * Don't force it for interwikis, since the other
1339                  * site might be case-sensitive.
1340                  */
1341                 if( $wgCapitalLinks && $this->mInterwiki == '') {
1342                         $t = $wgContLang->ucfirst( $r );
1343                 } else {
1344                         $t = $r;
1345                 }
1346
1347                 /**
1348                  * Can't make a link to a namespace alone...
1349                  * "empty" local links can only be self-links
1350                  * with a fragment identifier.
1351                  */
1352                 if( $t == '' &&
1353                         $this->mInterwiki == '' &&
1354                         $this->mNamespace != NS_MAIN ) {
1355                         wfProfileOut( $fname );
1356                         return false;
1357                 }
1358
1359                 # Fill fields
1360                 $this->mDbkeyform = $t;
1361                 $this->mUrlform = wfUrlencode( $t );
1362
1363                 $this->mTextform = str_replace( '_', ' ', $t );
1364
1365                 wfProfileOut( $fname );
1366                 return true;
1367         }
1368
1369         /**
1370          * Get a Title object associated with the talk page of this article
1371          * @return Title the object for the talk page
1372          * @access public
1373          */
1374         function getTalkPage() {
1375                 return Title::makeTitle( Namespace::getTalk( $this->getNamespace() ), $this->getDBkey() );
1376         }
1377
1378         /**
1379          * Get a title object associated with the subject page of this
1380          * talk page
1381          *
1382          * @return Title the object for the subject page
1383          * @access public
1384          */
1385         function getSubjectPage() {
1386                 return Title::makeTitle( Namespace::getSubject( $this->getNamespace() ), $this->getDBkey() );
1387         }
1388
1389         /**
1390          * Get an array of Title objects linking to this Title
1391          * Also stores the IDs in the link cache.
1392          *
1393          * @param string $options may be FOR UPDATE
1394          * @return array the Title objects linking here
1395          * @access public
1396          */
1397         function getLinksTo( $options = '' ) {
1398                 global $wgLinkCache;
1399                 $id = $this->getArticleID();
1400
1401                 if ( $options ) {
1402                         $db =& wfGetDB( DB_MASTER );
1403                 } else {
1404                         $db =& wfGetDB( DB_SLAVE );
1405                 }
1406
1407                 $res = $db->select( array( 'page', 'pagelinks' ),
1408                         array( 'page_namespace', 'page_title', 'page_id' ),
1409                         array(
1410                                 'pl_from=page_id',
1411                                 'pl_namespace' => $this->getNamespace(),
1412                                 'pl_title'     => $this->getDbKey() ),
1413                         'Title::getLinksTo',
1414                         $options );
1415
1416                 $retVal = array();
1417                 if ( $db->numRows( $res ) ) {
1418                         while ( $row = $db->fetchObject( $res ) ) {
1419                                 if ( $titleObj = Title::makeTitle( $row->page_namespace, $row->page_title ) ) {
1420                                         $wgLinkCache->addGoodLinkObj( $row->page_id, $titleObj );
1421                                         $retVal[] = $titleObj;
1422                                 }
1423                         }
1424                 }
1425                 $db->freeResult( $res );
1426                 return $retVal;
1427         }
1428
1429         /**
1430          * Get an array of Title objects referring to non-existent articles linked from this page
1431          *
1432          * @param string $options may be FOR UPDATE
1433          * @return array the Title objects
1434          * @access public
1435          */
1436         function getBrokenLinksFrom( $options = '' ) {
1437                 global $wgLinkCache;
1438
1439                 if ( $options ) {
1440                         $db =& wfGetDB( DB_MASTER );
1441                 } else {
1442                         $db =& wfGetDB( DB_SLAVE );
1443                 }
1444
1445                 $res = $db->safeQuery(
1446                           "SELECT pl_namespace, pl_title
1447                              FROM !
1448                         LEFT JOIN !
1449                                ON pl_namespace=page_namespace
1450                               AND pl_title=page_title
1451                             WHERE pl_from=?
1452                               AND page_namespace IS NULL
1453                                   !",
1454                         $db->tableName( 'pagelinks' ),
1455                         $db->tableName( 'page' ),
1456                         $this->getArticleId(),
1457                         $options );
1458
1459                 $retVal = array();
1460                 if ( $db->numRows( $res ) ) {
1461                         while ( $row = $db->fetchObject( $res ) ) {
1462                                 $retVal[] = Title::makeTitle( $row->pl_namespace, $row->pl_title );
1463                         }
1464                 }
1465                 $db->freeResult( $res );
1466                 return $retVal;
1467         }
1468
1469
1470         /**
1471          * Get a list of URLs to purge from the Squid cache when this
1472          * page changes
1473          *
1474          * @return array the URLs
1475          * @access public
1476          */
1477         function getSquidURLs() {
1478                 return array(
1479                         $this->getInternalURL(),
1480                         $this->getInternalURL( 'action=history' )
1481                 );
1482         }
1483
1484         /**
1485          * Move this page without authentication
1486          * @param Title &$nt the new page Title
1487          * @access public
1488          */
1489         function moveNoAuth( &$nt ) {
1490                 return $this->moveTo( $nt, false );
1491         }
1492
1493         /**
1494          * Check whether a given move operation would be valid.
1495          * Returns true if ok, or a message key string for an error message
1496          * if invalid. (Scarrrrry ugly interface this.)
1497          * @param Title &$nt the new title
1498          * @param bool $auth indicates whether $wgUser's permissions
1499          *      should be checked
1500          * @return mixed true on success, message name on failure
1501          * @access public
1502          */
1503         function isValidMoveOperation( &$nt, $auth = true, $reason = '' ) {
1504                 global $wgUser;
1505                 if( !$this or !$nt ) {
1506                         return 'badtitletext';
1507                 }
1508                 if( $this->equals( $nt ) ) {
1509                         return 'selfmove';
1510                 }
1511                 if( !$this->isMovable() || !$nt->isMovable() ) {
1512                         return 'immobile_namespace';
1513                 }
1514
1515                 $fname = 'Title::move';
1516                 $oldid = $this->getArticleID();
1517                 $newid = $nt->getArticleID();
1518
1519                 if ( strlen( $nt->getDBkey() ) < 1 ) {
1520                         return 'articleexists';
1521                 }
1522                 if ( ( '' == $this->getDBkey() ) ||
1523                          ( !$oldid ) ||
1524                      ( '' == $nt->getDBkey() ) ) {
1525                         return 'badarticleerror';
1526                 }
1527
1528                 if ( $auth && (
1529                                 !$this->userCanEdit() || !$nt->userCanEdit() ||
1530                                 !$this->userCanMove() || !$nt->userCanMove() ) ) {
1531                         return 'protectedpage';
1532                 }
1533
1534                 # The move is allowed only if (1) the target doesn't exist, or
1535                 # (2) the target is a redirect to the source, and has no history
1536                 # (so we can undo bad moves right after they're done).
1537
1538                 if ( 0 != $newid ) { # Target exists; check for validity
1539                         if ( ! $this->isValidMoveTarget( $nt ) ) {
1540                                 return 'articleexists';
1541                         }
1542                 }
1543                 return true;
1544         }
1545
1546         /**
1547          * Move a title to a new location
1548          * @param Title &$nt the new title
1549          * @param bool $auth indicates whether $wgUser's permissions
1550          *      should be checked
1551          * @return mixed true on success, message name on failure
1552          * @access public
1553          */
1554         function moveTo( &$nt, $auth = true, $reason = '' ) {
1555                 $err = $this->isValidMoveOperation( $nt, $auth, $reason );
1556                 if( is_string( $err ) ) {
1557                         return $err;
1558                 }
1559
1560                 $pageid = $this->getArticleID();
1561                 if( $nt->exists() ) {
1562                         $this->moveOverExistingRedirect( $nt, $reason );
1563                         $pageCountChange = 0;
1564                 } else { # Target didn't exist, do normal move.
1565                         $this->moveToNewTitle( $nt, $newid, $reason );
1566                         $pageCountChange = 1;
1567                 }
1568                 $redirid = $this->getArticleID();
1569
1570                 # Fixing category links (those without piped 'alternate' names) to be sorted under the new title
1571                 $dbw =& wfGetDB( DB_MASTER );
1572                 $categorylinks = $dbw->tableName( 'categorylinks' );
1573                 $sql = "UPDATE $categorylinks SET cl_sortkey=" . $dbw->addQuotes( $nt->getPrefixedText() ) .
1574                         " WHERE cl_from=" . $dbw->addQuotes( $pageid ) .
1575                         " AND cl_sortkey=" . $dbw->addQuotes( $this->getPrefixedText() );
1576                 $dbw->query( $sql, 'SpecialMovepage::doSubmit' );
1577
1578                 # Update watchlists
1579
1580                 $oldnamespace = $this->getNamespace() & ~1;
1581                 $newnamespace = $nt->getNamespace() & ~1;
1582                 $oldtitle = $this->getDBkey();
1583                 $newtitle = $nt->getDBkey();
1584
1585                 if( $oldnamespace != $newnamespace || $oldtitle != $newtitle ) {
1586                         WatchedItem::duplicateEntries( $this, $nt );
1587                 }
1588
1589                 # Update search engine
1590                 $u = new SearchUpdate( $pageid, $nt->getPrefixedDBkey() );
1591                 $u->doUpdate();
1592                 $u = new SearchUpdate( $redirid, $this->getPrefixedDBkey(), '' );
1593                 $u->doUpdate();
1594
1595                 # Update site_stats
1596                 if ( $this->getNamespace() == NS_MAIN and $nt->getNamespace() != NS_MAIN ) {
1597                         # Moved out of main namespace
1598                         # not viewed, edited, removing
1599                         $u = new SiteStatsUpdate( 0, 1, -1, $pageCountChange);
1600                 } elseif ( $this->getNamespace() != NS_MAIN and $nt->getNamespace() == NS_MAIN ) {
1601                         # Moved into main namespace
1602                         # not viewed, edited, adding
1603                         $u = new SiteStatsUpdate( 0, 1, +1, $pageCountChange );
1604                 } elseif ( $pageCountChange ) {
1605                         # Added redirect
1606                         $u = new SiteStatsUpdate( 0, 0, 0, 1 );
1607                 } else{
1608                         $u = false;
1609                 }
1610                 if ( $u ) {
1611                         $u->doUpdate();
1612                 }
1613
1614                 global $wgUser;
1615                 wfRunHooks( 'TitleMoveComplete', array( &$this, &$nt, &$wgUser, $pageid, $redirid ) );
1616                 return true;
1617         }
1618
1619         /**
1620          * Move page to a title which is at present a redirect to the
1621          * source page
1622          *
1623          * @param Title &$nt the page to move to, which should currently
1624          *      be a redirect
1625          * @access private
1626          */
1627         function moveOverExistingRedirect( &$nt, $reason = '' ) {
1628                 global $wgUser, $wgLinkCache, $wgUseSquid, $wgMwRedir;
1629                 $fname = 'Title::moveOverExistingRedirect';
1630                 $comment = wfMsgForContent( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() );
1631
1632                 if ( $reason ) {
1633                         $comment .= ": $reason";
1634                 }
1635
1636                 $now = wfTimestampNow();
1637                 $rand = wfRandom();
1638                 $newid = $nt->getArticleID();
1639                 $oldid = $this->getArticleID();
1640                 $dbw =& wfGetDB( DB_MASTER );
1641                 $links = $dbw->tableName( 'links' );
1642
1643                 # Delete the old redirect. We don't save it to history since
1644                 # by definition if we've got here it's rather uninteresting.
1645                 # We have to remove it so that the next step doesn't trigger
1646                 # a conflict on the unique namespace+title index...
1647                 $dbw->delete( 'page', array( 'page_id' => $newid ), $fname );
1648
1649                 # Save a null revision in the page's history notifying of the move
1650                 $nullRevision = Revision::newNullRevision( $dbw, $oldid,
1651                         wfMsgForContent( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() ),
1652                         true );
1653                 $nullRevId = $nullRevision->insertOn( $dbw );
1654
1655                 # Change the name of the target page:
1656                 $dbw->update( 'page',
1657                         /* SET */ array(
1658                                 'page_touched'   => $dbw->timestamp($now),
1659                                 'page_namespace' => $nt->getNamespace(),
1660                                 'page_title'     => $nt->getDBkey(),
1661                                 'page_latest'    => $nullRevId,
1662                         ),
1663                         /* WHERE */ array( 'page_id' => $oldid ),
1664                         $fname
1665                 );
1666                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
1667
1668                 # Recreate the redirect, this time in the other direction.
1669                 $redirectText = $wgMwRedir->getSynonym( 0 ) . ' [[' . $nt->getPrefixedText() . "]]\n";
1670                 $redirectArticle = new Article( $this );
1671                 $newid = $redirectArticle->insertOn( $dbw );
1672                 $redirectRevision = new Revision( array(
1673                         'page'    => $newid,
1674                         'comment' => $comment,
1675                         'text'    => $redirectText ) );
1676                 $revid = $redirectRevision->insertOn( $dbw );
1677                 $redirectArticle->updateRevisionOn( $dbw, $redirectRevision, 0 );
1678                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
1679
1680                 # Log the move
1681                 $log = new LogPage( 'move' );
1682                 $log->addEntry( 'move_redir', $this, $reason, array( 1 => $nt->getPrefixedText() ) );
1683
1684                 # Now, we record the link from the redirect to the new title.
1685                 # It should have no other outgoing links...
1686                 $dbw->delete( 'pagelinks', array( 'pl_from' => $newid ), $fname );
1687                 $dbw->insert( 'pagelinks',
1688                         array(
1689                                 'pl_from'      => $newid,
1690                                 'pl_namespace' => $nt->getNamespace(),
1691                                 'pl_title'     => $nt->getDbKey() ),
1692                         $fname );
1693
1694                 # Purge squid
1695                 if ( $wgUseSquid ) {
1696                         $urls = array_merge( $nt->getSquidURLs(), $this->getSquidURLs() );
1697                         $u = new SquidUpdate( $urls );
1698                         $u->doUpdate();
1699                 }
1700         }
1701
1702         /**
1703          * Move page to non-existing title.
1704          * @param Title &$nt the new Title
1705          * @param int &$newid set to be the new article ID
1706          * @access private
1707          */
1708         function moveToNewTitle( &$nt, &$newid, $reason = '' ) {
1709                 global $wgUser, $wgLinkCache, $wgUseSquid;
1710                 global $wgMwRedir;
1711                 $fname = 'MovePageForm::moveToNewTitle';
1712                 $comment = wfMsgForContent( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() );
1713                 if ( $reason ) {
1714                         $comment .= ": $reason";
1715                 }
1716
1717                 $newid = $nt->getArticleID();
1718                 $oldid = $this->getArticleID();
1719                 $dbw =& wfGetDB( DB_MASTER );
1720                 $now = $dbw->timestamp();
1721                 wfSeedRandom();
1722                 $rand = wfRandom();
1723
1724                 # Save a null revision in the page's history notifying of the move
1725                 $nullRevision = Revision::newNullRevision( $dbw, $oldid,
1726                         wfMsgForContent( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() ),
1727                         true );
1728                 $nullRevId = $nullRevision->insertOn( $dbw );
1729
1730                 # Rename cur entry
1731                 $dbw->update( 'page',
1732                         /* SET */ array(
1733                                 'page_touched'   => $now,
1734                                 'page_namespace' => $nt->getNamespace(),
1735                                 'page_title'     => $nt->getDBkey(),
1736                                 'page_latest'    => $nullRevId,
1737                         ),
1738                         /* WHERE */ array( 'page_id' => $oldid ),
1739                         $fname
1740                 );
1741
1742                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
1743
1744                 # Insert redirect
1745                 $redirectText = $wgMwRedir->getSynonym( 0 ) . ' [[' . $nt->getPrefixedText() . "]]\n";
1746                 $redirectArticle = new Article( $this );
1747                 $newid = $redirectArticle->insertOn( $dbw );
1748                 $redirectRevision = new Revision( array(
1749                         'page'    => $newid,
1750                         'comment' => $comment,
1751                         'text'    => $redirectText ) );
1752                 $revid = $redirectRevision->insertOn( $dbw );
1753                 $redirectArticle->updateRevisionOn( $dbw, $redirectRevision, 0 );
1754                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
1755
1756                 # Log the move
1757                 $log = new LogPage( 'move' );
1758                 $log->addEntry( 'move', $this, $reason, array( 1 => $nt->getPrefixedText()) );
1759
1760                 # Purge caches as per article creation
1761                 Article::onArticleCreate( $nt );
1762
1763                 # Record the just-created redirect's linking to the page
1764                 $dbw->insert( 'pagelinks',
1765                         array(
1766                                 'pl_from'      => $newid,
1767                                 'pl_namespace' => $nt->getNamespace(),
1768                                 'pl_title'     => $nt->getDBkey() ),
1769                         $fname );
1770
1771                 # Non-existent target may have had broken links to it; these must
1772                 # now be touched to update link coloring.
1773                 $nt->touchLinks();
1774
1775                 # Purge old title from squid
1776                 # The new title, and links to the new title, are purged in Article::onArticleCreate()
1777                 $titles = $nt->getLinksTo();
1778                 if ( $wgUseSquid ) {
1779                         $urls = $this->getSquidURLs();
1780                         foreach ( $titles as $linkTitle ) {
1781                                 $urls[] = $linkTitle->getInternalURL();
1782                         }
1783                         $u = new SquidUpdate( $urls );
1784                         $u->doUpdate();
1785                 }
1786         }
1787
1788         /**
1789          * Checks if $this can be moved to a given Title
1790          * - Selects for update, so don't call it unless you mean business
1791          *
1792          * @param Title &$nt the new title to check
1793          * @access public
1794          */
1795         function isValidMoveTarget( $nt ) {
1796
1797                 $fname = 'Title::isValidMoveTarget';
1798                 $dbw =& wfGetDB( DB_MASTER );
1799
1800                 # Is it a redirect?
1801                 $id  = $nt->getArticleID();
1802                 $obj = $dbw->selectRow( array( 'page', 'revision', 'text'),
1803                         array( 'page_is_redirect','old_text','old_flags' ),
1804                         array( 'page_id' => $id, 'page_latest=rev_id', 'rev_text_id=old_id' ),
1805                         $fname, 'FOR UPDATE' );
1806
1807                 if ( !$obj || 0 == $obj->page_is_redirect ) {
1808                         # Not a redirect
1809                         return false;
1810                 }
1811                 $text = Revision::getRevisionText( $obj );
1812
1813                 # Does the redirect point to the source?
1814                 if ( preg_match( "/\\[\\[\\s*([^\\]\\|]*)]]/", $text, $m ) ) {
1815                         $redirTitle = Title::newFromText( $m[1] );
1816                         if( !is_object( $redirTitle ) ||
1817                                 $redirTitle->getPrefixedDBkey() != $this->getPrefixedDBkey() ) {
1818                                 return false;
1819                         }
1820                 } else {
1821                         # Fail safe
1822                         return false;
1823                 }
1824
1825                 # Does the article have a history?
1826                 $row = $dbw->selectRow( array( 'page', 'revision'),
1827                         array( 'rev_id' ),
1828                         array( 'page_namespace' => $nt->getNamespace(),
1829                                 'page_title' => $nt->getDBkey(),
1830                                 'page_id=rev_page AND page_latest != rev_id'
1831                         ), $fname, 'FOR UPDATE'
1832                 );
1833
1834                 # Return true if there was no history
1835                 return $row === false;
1836         }
1837
1838         /**
1839          * Create a redirect; fails if the title already exists; does
1840          * not notify RC
1841          *
1842          * @param Title $dest the destination of the redirect
1843          * @param string $comment the comment string describing the move
1844          * @return bool true on success
1845          * @access public
1846          */
1847         function createRedirect( $dest, $comment ) {
1848                 global $wgUser;
1849                 if ( $this->getArticleID() ) {
1850                         return false;
1851                 }
1852
1853                 $fname = 'Title::createRedirect';
1854                 $dbw =& wfGetDB( DB_MASTER );
1855
1856                 $article = new Article( $this );
1857                 $newid = $article->insertOn( $dbw );
1858                 $revision = new Revision( array(
1859                         'page'      => $newid,
1860                         'comment'   => $comment,
1861                         'text'      => "#REDIRECT [[" . $dest->getPrefixedText() . "]]\n",
1862                         ) );
1863                 $revisionId = $revision->insertOn( $dbw );
1864                 $article->updateRevisionOn( $dbw, $revision, 0 );
1865
1866                 # Link table
1867                 $dbw->insert( 'pagelinks',
1868                         array(
1869                                 'pl_from'      => $newid,
1870                                 'pl_namespace' => $dest->getNamespace(),
1871                                 'pl_title'     => $dest->getDbKey()
1872                         ), $fname
1873                 );
1874
1875                 Article::onArticleCreate( $this );
1876                 return true;
1877         }
1878
1879         /**
1880          * Get categories to which this Title belongs and return an array of
1881          * categories' names.
1882          *
1883          * @return array an array of parents in the form:
1884          *      $parent => $currentarticle
1885          * @access public
1886          */
1887         function getParentCategories() {
1888                 global $wgContLang,$wgUser;
1889
1890                 $titlekey = $this->getArticleId();
1891                 $sk =& $wgUser->getSkin();
1892                 $parents = array();
1893                 $dbr =& wfGetDB( DB_SLAVE );
1894                 $categorylinks = $dbr->tableName( 'categorylinks' );
1895
1896                 # NEW SQL
1897                 $sql = "SELECT * FROM $categorylinks"
1898                      ." WHERE cl_from='$titlekey'"
1899                          ." AND cl_from <> '0'"
1900                          ." ORDER BY cl_sortkey";
1901
1902                 $res = $dbr->query ( $sql ) ;
1903
1904                 if($dbr->numRows($res) > 0) {
1905                         while ( $x = $dbr->fetchObject ( $res ) )
1906                                 //$data[] = Title::newFromText($wgContLang->getNSText ( NS_CATEGORY ).':'.$x->cl_to);
1907                                 $data[$wgContLang->getNSText ( NS_CATEGORY ).':'.$x->cl_to] = $this->getFullText();
1908                         $dbr->freeResult ( $res ) ;
1909                 } else {
1910                         $data = '';
1911                 }
1912                 return $data;
1913         }
1914
1915         /**
1916          * Get a tree of parent categories
1917          * @param array $children an array with the children in the keys, to check for circular refs
1918          * @return array
1919          * @access public
1920          */
1921         function getParentCategoryTree( $children = array() ) {
1922                 $parents = $this->getParentCategories();
1923
1924                 if($parents != '') {
1925                         foreach($parents as $parent => $current)
1926                         {
1927                                 if ( array_key_exists( $parent, $children ) ) {
1928                                         # Circular reference
1929                                         $stack[$parent] = array();
1930                                 } else {
1931                                         $nt = Title::newFromText($parent);
1932                                         $stack[$parent] = $nt->getParentCategoryTree( $children + array($parent => 1) );
1933                                 }
1934                         }
1935                         return $stack;
1936                 } else {
1937                         return array();
1938                 }
1939         }
1940
1941
1942         /**
1943          * Get an associative array for selecting this title from
1944          * the "cur" table
1945          *
1946          * @return array
1947          * @access public
1948          */
1949         function curCond() {
1950                 wfDebugDieBacktrace( 'curCond called' );
1951                 return array( 'cur_namespace' => $this->mNamespace, 'cur_title' => $this->mDbkeyform );
1952         }
1953
1954         /**
1955          * Get an associative array for selecting this title from the
1956          * "old" table
1957          *
1958          * @return array
1959          * @access public
1960          */
1961         function oldCond() {
1962                 wfDebugDieBacktrace( 'oldCond called' );
1963                 return array( 'old_namespace' => $this->mNamespace, 'old_title' => $this->mDbkeyform );
1964         }
1965
1966         /**
1967          * Get the revision ID of the previous revision
1968          *
1969          * @param integer $revision  Revision ID. Get the revision that was before this one.
1970          * @return interger $oldrevision|false
1971          */
1972         function getPreviousRevisionID( $revision ) {
1973                 $dbr =& wfGetDB( DB_SLAVE );
1974                 return $dbr->selectField( 'revision', 'rev_id',
1975                         'rev_page=' . intval( $this->getArticleId() ) .
1976                         ' AND rev_id<' . intval( $revision ) . ' ORDER BY rev_id DESC' );
1977         }
1978
1979         /**
1980          * Get the revision ID of the next revision
1981          *
1982          * @param integer $revision  Revision ID. Get the revision that was after this one.
1983          * @return interger $oldrevision|false
1984          */
1985         function getNextRevisionID( $revision ) {
1986                 $dbr =& wfGetDB( DB_SLAVE );
1987                 return $dbr->selectField( 'revision', 'rev_id',
1988                         'rev_page=' . intval( $this->getArticleId() ) .
1989                         ' AND rev_id>' . intval( $revision ) . ' ORDER BY rev_id' );
1990         }
1991
1992         /**
1993          * Compare with another title.
1994          *
1995          * @param Title $title
1996          * @return bool
1997          */
1998         function equals( $title ) {
1999                 return $this->getInterwiki() == $title->getInterwiki()
2000                         && $this->getNamespace() == $title->getNamespace()
2001                         && $this->getDbkey() == $title->getDbkey();
2002         }
2003
2004         /**
2005          * Check if page exists
2006          * @return bool
2007          */
2008         function exists() {
2009                 return $this->getArticleId() != 0;
2010         }
2011
2012         /**
2013          * Should a link should be displayed as a known link, just based on its title?
2014          *
2015          * Currently, a self-link with a fragment and special pages are in
2016          * this category. Special pages never exist in the database.
2017          */
2018         function isAlwaysKnown() {
2019                 return  $this->isExternal() || ( 0 == $this->mNamespace && "" == $this->mDbkeyform )
2020                   || NS_SPECIAL == $this->mNamespace;
2021         }
2022
2023         /**
2024          * Update page_touched timestamps on pages linking to this title.
2025          * In principal, this could be backgrounded and could also do squid
2026          * purging.
2027          */
2028         function touchLinks() {
2029                 $fname = 'Title::touchLinks';
2030
2031                 $dbw =& wfGetDB( DB_MASTER );
2032
2033                 $res = $dbw->select( 'pagelinks',
2034                         array( 'pl_from' ),
2035                         array(
2036                                 'pl_namespace' => $this->getNamespace(),
2037                                 'pl_title'     => $this->getDbKey() ),
2038                         $fname );
2039                 if ( 0 == $dbw->numRows( $res ) ) {
2040                         return;
2041                 }
2042
2043                 $arr = array();
2044                 $toucharr = array();
2045                 while( $row = $dbw->fetchObject( $res ) ) {
2046                         $toucharr[] = $row->pl_from;
2047                 }
2048                 if (!count($toucharr))
2049                         return;
2050                 $dbw->update( 'page', /* SET */ array( 'page_touched' => $dbw->timestamp() ),
2051                                                         /* WHERE */ array( 'page_id' => $toucharr ),$fname);
2052         }
2053
2054         function trackbackURL() {
2055                 global $wgTitle, $wgScriptPath, $wgServer;
2056
2057                 return "$wgServer$wgScriptPath/trackback.php?article="
2058                         . htmlspecialchars(urlencode($wgTitle->getPrefixedDBkey()));
2059         }
2060
2061         function trackbackRDF() {
2062                 $url = htmlspecialchars($this->getFullURL());
2063                 $title = htmlspecialchars($this->getText());
2064                 $tburl = $this->trackbackURL();
2065
2066                 return "
2067 <rdf:RDF xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\"
2068          xmlns:dc=\"http://purl.org/dc/elements/1.1/\"
2069          xmlns:trackback=\"http://madskills.com/public/xml/rss/module/trackback/\">
2070 <rdf:Description
2071    rdf:about=\"$url\"
2072    dc:identifier=\"$url\"
2073    dc:title=\"$title\"
2074    trackback:ping=\"$tburl\" />
2075 </rdf:RDF>";
2076         }
2077 }
2078 ?>