includes/Title.php

   1 <?php
   2 /**
   3  * See title.txt
   4  *
   5  * @package MediaWiki
   6  */
   7
   8 require_once( 'normal/UtfNormal.php' );
   9
  10 $wgTitleInterwikiCache = array();
  11 define ( 'GAID_FOR_UPDATE', 1 );
  12
  13 # Title::newFromTitle maintains a cache to avoid
  14 # expensive re-normalization of commonly used titles.
  15 # On a batch operation this can become a memory leak
  16 # if not bounded. After hitting this many titles,
  17 # reset the cache.
  18 define( 'MW_TITLECACHE_MAX', 1000 );
  19
  20 /**
  21  * Title class
  22  * - Represents a title, which may contain an interwiki designation or namespace
  23  * - Can fetch various kinds of data from the database, albeit inefficiently.
  24  *
  25  * @package MediaWiki
  26  */
  27 class Title {
  28         /**
  29          * All member variables should be considered private
  30          * Please use the accessor functions
  31          */
  32
  33          /**#@+
  34          * @access private
  35          */
  36
  37         var $mTextform;           # Text form (spaces not underscores) of the main part
  38         var $mUrlform;            # URL-encoded form of the main part
  39         var $mDbkeyform;          # Main part with underscores
  40         var $mNamespace;          # Namespace index, i.e. one of the NS_xxxx constants
  41         var $mInterwiki;          # Interwiki prefix (or null string)
  42         var $mFragment;           # Title fragment (i.e. the bit after the #)
  43         var $mArticleID;          # Article ID, fetched from the link cache on demand
  44         var $mRestrictions;       # Array of groups allowed to edit this article
  45                               # Only null or "sysop" are supported
  46         var $mRestrictionsLoaded; # Boolean for initialisation on demand
  47         var $mPrefixedText;       # Text form including namespace/interwiki, initialised on demand
  48         var $mDefaultNamespace;   # Namespace index when there is no namespace
  49                               # Zero except in {{transclusion}} tags
  50         var $mWatched;            # Is $wgUser watching this page? NULL if unfilled, accessed through userIsWatching()
  51         /**#@-*/
  52
  53
  54         /**
  55          * Constructor
  56          * @access private
  57          */
  58         /* private */ function Title() {
  59                 $this->mInterwiki = $this->mUrlform =
  60                 $this->mTextform = $this->mDbkeyform = '';
  61                 $this->mArticleID = -1;
  62                 $this->mNamespace = NS_MAIN;
  63                 $this->mRestrictionsLoaded = false;
  64                 $this->mRestrictions = array();
  65                 # Dont change the following, NS_MAIN is hardcoded in several place
  66                 # See bug #696
  67                 $this->mDefaultNamespace = NS_MAIN;
  68                 $this->mWatched = NULL;
  69         }
  70
  71         /**
  72          * Create a new Title from a prefixed DB key
  73          * @param string $key The database key, which has underscores
  74          *      instead of spaces, possibly including namespace and
  75          *      interwiki prefixes
  76          * @return Title the new object, or NULL on an error
  77          * @static
  78          * @access public
  79          */
  80         /* static */ function newFromDBkey( $key ) {
  81                 $t = new Title();
  82                 $t->mDbkeyform = $key;
  83                 if( $t->secureAndSplit() )
  84                         return $t;
  85                 else
  86                         return NULL;
  87         }
  88
  89         /**
  90          * Create a new Title from text, such as what one would
  91          * find in a link. Decodes any HTML entities in the text.
  92          *
  93          * @param string $text the link text; spaces, prefixes,
  94          *      and an initial ':' indicating the main namespace
  95          *      are accepted
  96          * @param int $defaultNamespace the namespace to use if
  97          *      none is specified by a prefix
  98          * @return Title the new object, or NULL on an error
  99          * @static
 100          * @access public
 101          */
 102         function &newFromText( $text, $defaultNamespace = NS_MAIN ) {
 103                 $fname = 'Title::newFromText';
 104                 wfProfileIn( $fname );
 105
 106                 if( is_object( $text ) ) {
 107                         wfDebugDieBacktrace( 'Title::newFromText given an object' );
 108                 }
 109
 110                 /**
 111                  * Wiki pages often contain multiple links to the same page.
 112                  * Title normalization and parsing can become expensive on
 113                  * pages with many links, so we can save a little time by
 114                  * caching them.
 115                  *
 116                  * In theory these are value objects and won't get changed...
 117                  */
 118                 static $titleCache = array();
 119                 if( $defaultNamespace == NS_MAIN && isset( $titleCache[$text] ) ) {
 120                         wfProfileOut( $fname );
 121                         return $titleCache[$text];
 122                 }
 123
 124                 /**
 125                  * Convert things like &eacute; &#257; or &#x3017; into real text...
 126                  */
 127                 $filteredText = Sanitizer::decodeCharReferences( $text );
 128
 129                 $t =& new Title();
 130                 $t->mDbkeyform = str_replace( ' ', '_', $filteredText );
 131                 $t->mDefaultNamespace = $defaultNamespace;
 132
 133                 if( $t->secureAndSplit() ) {
 134                         if( $defaultNamespace == NS_MAIN ) {
 135                                 if( count( $titleCache ) >= MW_TITLECACHE_MAX ) {
 136                                         # Avoid memory leaks on mass operations...
 137                                         $titleCache = array();
 138                                 }
 139                                 $titleCache[$text] =& $t;
 140                         }
 141                         wfProfileOut( $fname );
 142                         return $t;
 143                 } else {
 144                         wfProfileOut( $fname );
 145                         return NULL;
 146                 }
 147         }
 148
 149         /**
 150          * Create a new Title from URL-encoded text. Ensures that
 151          * the given title's length does not exceed the maximum.
 152          * @param string $url the title, as might be taken from a URL
 153          * @return Title the new object, or NULL on an error
 154          * @static
 155          * @access public
 156          */
 157         function newFromURL( $url ) {
 158                 global $wgLang, $wgServer;
 159                 $t = new Title();
 160
 161                 # For compatibility with old buggy URLs. "+" is not valid in titles,
 162                 # but some URLs used it as a space replacement and they still come
 163                 # from some external search tools.
 164                 $s = str_replace( '+', ' ', $url );
 165
 166                 $t->mDbkeyform = str_replace( ' ', '_', $s );
 167                 if( $t->secureAndSplit() ) {
 168                         return $t;
 169                 } else {
 170                         return NULL;
 171                 }
 172         }
 173
 174         /**
 175          * Create a new Title from an article ID
 176          *
 177          * @todo This is inefficiently implemented, the page row is requested
 178          *       but not used for anything else
 179          *
 180          * @param int $id the page_id corresponding to the Title to create
 181          * @return Title the new object, or NULL on an error
 182          * @access public
 183          * @static
 184          */
 185         function newFromID( $id ) {
 186                 $fname = 'Title::newFromID';
 187                 $dbr =& wfGetDB( DB_SLAVE );
 188                 $row = $dbr->selectRow( 'page', array( 'page_namespace', 'page_title' ),
 189                         array( 'page_id' => $id ), $fname );
 190                 if ( $row !== false ) {
 191                         $title = Title::makeTitle( $row->page_namespace, $row->page_title );
 192                 } else {
 193                         $title = NULL;
 194                 }
 195                 return $title;
 196         }
 197
 198         /**
 199          * Create a new Title from a namespace index and a DB key.
 200          * It's assumed that $ns and $title are *valid*, for instance when
 201          * they came directly from the database or a special page name.
 202          * For convenience, spaces are converted to underscores so that
 203          * eg user_text fields can be used directly.
 204          *
 205          * @param int $ns the namespace of the article
 206          * @param string $title the unprefixed database key form
 207          * @return Title the new object
 208          * @static
 209          * @access public
 210          */
 211         function &makeTitle( $ns, $title ) {
 212                 $t =& new Title();
 213                 $t->mInterwiki = '';
 214                 $t->mFragment = '';
 215                 $t->mNamespace = IntVal( $ns );
 216                 $t->mDbkeyform = str_replace( ' ', '_', $title );
 217                 $t->mArticleID = ( $ns >= 0 ) ? -1 : 0;
 218                 $t->mUrlform = wfUrlencode( $t->mDbkeyform );
 219                 $t->mTextform = str_replace( '_', ' ', $title );
 220                 return $t;
 221         }
 222
 223         /**
 224          * Create a new Title frrom a namespace index and a DB key.
 225          * The parameters will be checked for validity, which is a bit slower
 226          * than makeTitle() but safer for user-provided data.
 227          *
 228          * @param int $ns the namespace of the article
 229          * @param string $title the database key form
 230          * @return Title the new object, or NULL on an error
 231          * @static
 232          * @access public
 233          */
 234         function makeTitleSafe( $ns, $title ) {
 235                 $t = new Title();
 236                 $t->mDbkeyform = Title::makeName( $ns, $title );
 237                 if( $t->secureAndSplit() ) {
 238                         return $t;
 239                 } else {
 240                         return NULL;
 241                 }
 242         }
 243
 244         /**
 245          * Create a new Title for the Main Page
 246          *
 247          * @static
 248          * @return Title the new object
 249          * @access public
 250          */
 251         function newMainPage() {
 252                 return Title::newFromText( wfMsgForContent( 'mainpage' ) );
 253         }
 254
 255         /**
 256          * Create a new Title for a redirect
 257          * @param string $text the redirect title text
 258          * @return Title the new object, or NULL if the text is not a
 259          *      valid redirect
 260          * @static
 261          * @access public
 262          */
 263         function newFromRedirect( $text ) {
 264                 global $wgMwRedir;
 265                 $rt = NULL;
 266                 if ( $wgMwRedir->matchStart( $text ) ) {
 267                         if ( preg_match( '/\[{2}(.*?)(?:\||\]{2})/', $text, $m ) ) {
 268                                 # categories are escaped using : for example one can enter:
 269                                 # #REDIRECT [[:Category:Music]]. Need to remove it.
 270                                 if ( substr($m[1],0,1) == ':') {
 271                                         # We don't want to keep the ':'
 272                                         $m[1] = substr( $m[1], 1 );
 273                                 }
 274
 275                                 $rt = Title::newFromText( $m[1] );
 276                                 # Disallow redirects to Special:Userlogout
 277                                 if ( !is_null($rt) && $rt->getNamespace() == NS_SPECIAL && preg_match( '/^Userlogout/i', $rt->getText() ) ) {
 278                                         $rt = NULL;
 279                                 }
 280                         }
 281                 }
 282                 return $rt;
 283         }
 284
 285 #----------------------------------------------------------------------------
 286 #       Static functions
 287 #----------------------------------------------------------------------------
 288
 289         /**
 290          * Get the prefixed DB key associated with an ID
 291          * @param int $id the page_id of the article
 292          * @return Title an object representing the article, or NULL
 293          *      if no such article was found
 294          * @static
 295          * @access public
 296          */
 297         function nameOf( $id ) {
 298                 $fname = 'Title::nameOf';
 299                 $dbr =& wfGetDB( DB_SLAVE );
 300
 301                 $s = $dbr->selectRow( 'page', array( 'page_namespace','page_title' ),  array( 'page_id' => $id ), $fname );
 302                 if ( $s === false ) { return NULL; }
 303
 304                 $n = Title::makeName( $s->page_namespace, $s->page_title );
 305                 return $n;
 306         }
 307
 308         /**
 309          * Get a regex character class describing the legal characters in a link
 310          * @return string the list of characters, not delimited
 311          * @static
 312          * @access public
 313          */
 314         /* static */ function legalChars() {
 315                 # Missing characters:
 316                 #  * []|# Needed for link syntax
 317                 #  * % and + are corrupted by Apache when they appear in the path
 318                 #
 319                 # % seems to work though
 320                 #
 321                 # The problem with % is that URLs are double-unescaped: once by Apache's
 322                 # path conversion code, and again by PHP. So %253F, for example, becomes "?".
 323                 # Our code does not double-escape to compensate for this, indeed double escaping
 324                 # would break if the double-escaped title was passed in the query string
 325                 # rather than the path. This is a minor security issue because articles can be
 326                 # created such that they are hard to view or edit. -- TS
 327                 #
 328                 # Theoretically 0x80-0x9F of ISO 8859-1 should be disallowed, but
 329                 # this breaks interlanguage links
 330
 331                 $set = " %!\"$&'()*,\\-.\\/0-9:;=?@A-Z\\\\^_`a-z~\\x80-\\xFF";
 332                 return $set;
 333         }
 334
 335         /**
 336          * Get a string representation of a title suitable for
 337          * including in a search index
 338          *
 339          * @param int $ns a namespace index
 340          * @param string $title text-form main part
 341          * @return string a stripped-down title string ready for the
 342          *      search index
 343          */
 344         /* static */ function indexTitle( $ns, $title ) {
 345                 global $wgDBminWordLen, $wgContLang;
 346                 require_once( 'SearchEngine.php' );
 347
 348                 $lc = SearchEngine::legalSearchChars() . '&#;';
 349                 $t = $wgContLang->stripForSearch( $title );
 350                 $t = preg_replace( "/[^{$lc}]+/", ' ', $t );
 351                 $t = strtolower( $t );
 352
 353                 # Handle 's, s'
 354                 $t = preg_replace( "/([{$lc}]+)'s( |$)/", "\\1 \\1's ", $t );
 355                 $t = preg_replace( "/([{$lc}]+)s'( |$)/", "\\1s ", $t );
 356
 357                 $t = preg_replace( "/\\s+/", ' ', $t );
 358
 359                 if ( $ns == NS_IMAGE ) {
 360                         $t = preg_replace( "/ (png|gif|jpg|jpeg|ogg)$/", "", $t );
 361                 }
 362                 return trim( $t );
 363         }
 364
 365         /*
 366          * Make a prefixed DB key from a DB key and a namespace index
 367          * @param int $ns numerical representation of the namespace
 368          * @param string $title the DB key form the title
 369          * @return string the prefixed form of the title
 370          */
 371         /* static */ function makeName( $ns, $title ) {
 372                 global $wgContLang;
 373
 374                 $n = $wgContLang->getNsText( $ns );
 375                 return $n == '' ? $title : "$n:$title";
 376         }
 377
 378         /**
 379          * Returns the URL associated with an interwiki prefix
 380          * @param string $key the interwiki prefix (e.g. "MeatBall")
 381          * @return the associated URL, containing "$1", which should be
 382          *      replaced by an article title
 383          * @static (arguably)
 384          * @access public
 385          */
 386         function getInterwikiLink( $key ) {
 387                 global $wgMemc, $wgDBname, $wgInterwikiExpiry, $wgTitleInterwikiCache;
 388                 $fname = 'Title::getInterwikiLink';
 389
 390                 wfProfileIn( $fname );
 391
 392                 $k = $wgDBname.':interwiki:'.$key;
 393                 if( array_key_exists( $k, $wgTitleInterwikiCache ) ) {
 394                         wfProfileOut( $fname );
 395                         return $wgTitleInterwikiCache[$k]->iw_url;
 396                 }
 397
 398                 $s = $wgMemc->get( $k );
 399                 # Ignore old keys with no iw_local
 400                 if( $s && isset( $s->iw_local ) ) {
 401                         $wgTitleInterwikiCache[$k] = $s;
 402                         wfProfileOut( $fname );
 403                         return $s->iw_url;
 404                 }
 405
 406                 $dbr =& wfGetDB( DB_SLAVE );
 407                 $res = $dbr->select( 'interwiki',
 408                         array( 'iw_url', 'iw_local' ),
 409                         array( 'iw_prefix' => $key ), $fname );
 410                 if( !$res ) {
 411                         wfProfileOut( $fname );
 412                         return '';
 413                 }
 414
 415                 $s = $dbr->fetchObject( $res );
 416                 if( !$s ) {
 417                         # Cache non-existence: create a blank object and save it to memcached
 418                         $s = (object)false;
 419                         $s->iw_url = '';
 420                         $s->iw_local = 0;
 421                 }
 422                 $wgMemc->set( $k, $s, $wgInterwikiExpiry );
 423                 $wgTitleInterwikiCache[$k] = $s;
 424
 425                 wfProfileOut( $fname );
 426                 return $s->iw_url;
 427         }
 428
 429         /**
 430          * Determine whether the object refers to a page within
 431          * this project.
 432          *
 433          * @return bool TRUE if this is an in-project interwiki link
 434          *      or a wikilink, FALSE otherwise
 435          * @access public
 436          */
 437         function isLocal() {
 438                 global $wgTitleInterwikiCache, $wgDBname;
 439
 440                 if ( $this->mInterwiki != '' ) {
 441                         # Make sure key is loaded into cache
 442                         $this->getInterwikiLink( $this->mInterwiki );
 443                         $k = $wgDBname.':interwiki:' . $this->mInterwiki;
 444                         return (bool)($wgTitleInterwikiCache[$k]->iw_local);
 445                 } else {
 446                         return true;
 447                 }
 448         }
 449
 450         /**
 451          * Update the page_touched field for an array of title objects
 452          * @todo Inefficient unless the IDs are already loaded into the
 453          *      link cache
 454          * @param array $titles an array of Title objects to be touched
 455          * @param string $timestamp the timestamp to use instead of the
 456          *      default current time
 457          * @static
 458          * @access public
 459          */
 460         function touchArray( $titles, $timestamp = '' ) {
 461                 if ( count( $titles ) == 0 ) {
 462                         return;
 463                 }
 464                 $dbw =& wfGetDB( DB_MASTER );
 465                 if ( $timestamp == '' ) {
 466                         $timestamp = $dbw->timestamp();
 467                 }
 468                 $page = $dbw->tableName( 'page' );
 469                 $sql = "UPDATE $page SET page_touched='{$timestamp}' WHERE page_id IN (";
 470                 $first = true;
 471
 472                 foreach ( $titles as $title ) {
 473                         if ( ! $first ) {
 474                                 $sql .= ',';
 475                         }
 476                         $first = false;
 477                         $sql .= $title->getArticleID();
 478                 }
 479                 $sql .= ')';
 480                 if ( ! $first ) {
 481                         $dbw->query( $sql, 'Title::touchArray' );
 482                 }
 483         }
 484
 485 #----------------------------------------------------------------------------
 486 #       Other stuff
 487 #----------------------------------------------------------------------------
 488
 489         /** Simple accessors */
 490         /**
 491          * Get the text form (spaces not underscores) of the main part
 492          * @return string
 493          * @access public
 494          */
 495         function getText() { return $this->mTextform; }
 496         /**
 497          * Get the URL-encoded form of the main part
 498          * @return string
 499          * @access public
 500          */
 501         function getPartialURL() { return $this->mUrlform; }
 502         /**
 503          * Get the main part with underscores
 504          * @return string
 505          * @access public
 506          */
 507         function getDBkey() { return $this->mDbkeyform; }
 508         /**
 509          * Get the namespace index, i.e. one of the NS_xxxx constants
 510          * @return int
 511          * @access public
 512          */
 513         function getNamespace() { return $this->mNamespace; }
 514         /**
 515          * Get the interwiki prefix (or null string)
 516          * @return string
 517          * @access public
 518          */
 519         function getInterwiki() { return $this->mInterwiki; }
 520         /**
 521          * Get the Title fragment (i.e. the bit after the #)
 522          * @return string
 523          * @access public
 524          */
 525         function getFragment() { return $this->mFragment; }
 526         /**
 527          * Get the default namespace index, for when there is no namespace
 528          * @return int
 529          * @access public
 530          */
 531         function getDefaultNamespace() { return $this->mDefaultNamespace; }
 532
 533         /**
 534          * Get title for search index
 535          * @return string a stripped-down title string ready for the
 536          *      search index
 537          */
 538         function getIndexTitle() {
 539                 return Title::indexTitle( $this->mNamespace, $this->mTextform );
 540         }
 541
 542         /**
 543          * Get the prefixed database key form
 544          * @return string the prefixed title, with underscores and
 545          *      any interwiki and namespace prefixes
 546          * @access public
 547          */
 548         function getPrefixedDBkey() {
 549                 $s = $this->prefix( $this->mDbkeyform );
 550                 $s = str_replace( ' ', '_', $s );
 551                 return $s;
 552         }
 553
 554         /**
 555          * Get the prefixed title with spaces.
 556          * This is the form usually used for display
 557          * @return string the prefixed title, with spaces
 558          * @access public
 559          */
 560         function getPrefixedText() {
 561                 global $wgContLang;
 562                 if ( empty( $this->mPrefixedText ) ) {
 563                         $s = $this->prefix( $this->mTextform );
 564                         $s = str_replace( '_', ' ', $s );
 565                         $this->mPrefixedText = $s;
 566                 }
 567                 return $this->mPrefixedText;
 568         }
 569
 570         /**
 571          * Get the prefixed title with spaces, plus any fragment
 572          * (part beginning with '#')
 573          * @return string the prefixed title, with spaces and
 574          *      the fragment, including '#'
 575          * @access public
 576          */
 577         function getFullText() {
 578                 global $wgContLang;
 579                 $text = $this->getPrefixedText();
 580                 if( '' != $this->mFragment ) {
 581                         $text .= '#' . $this->mFragment;
 582                 }
 583                 return $text;
 584         }
 585
 586         /**
 587          * Get a URL-encoded title (not an actual URL) including interwiki
 588          * @return string the URL-encoded form
 589          * @access public
 590          */
 591         function getPrefixedURL() {
 592                 $s = $this->prefix( $this->mDbkeyform );
 593                 $s = str_replace( ' ', '_', $s );
 594
 595                 $s = wfUrlencode ( $s ) ;
 596
 597                 # Cleaning up URL to make it look nice -- is this safe?
 598                 $s = str_replace( '%28', '(', $s );
 599                 $s = str_replace( '%29', ')', $s );
 600
 601                 return $s;
 602         }
 603
 604         /**
 605          * Get a real URL referring to this title, with interwiki link and
 606          * fragment
 607          *
 608          * @param string $query an optional query string, not used
 609          *      for interwiki links
 610          * @return string the URL
 611          * @access public
 612          */
 613         function getFullURL( $query = '' ) {
 614                 global $wgContLang, $wgServer, $wgScript, $wgMakeDumpLinks, $wgArticlePath;
 615
 616                 if ( '' == $this->mInterwiki ) {
 617                         return $wgServer . $this->getLocalUrl( $query );
 618                 } elseif ( $wgMakeDumpLinks && $wgContLang->getLanguageName( $this->mInterwiki ) ) {
 619                         $baseUrl = str_replace( '$1', "../../{$this->mInterwiki}/$1", $wgArticlePath );
 620                         $baseUrl = str_replace( '$1', $this->getHashedDirectory() . '/$1', $baseUrl );
 621                 } else {
 622                         $baseUrl = $this->getInterwikiLink( $this->mInterwiki );
 623                 }
 624
 625                 $namespace = $wgContLang->getNsText( $this->mNamespace );
 626                 if ( '' != $namespace ) {
 627                         # Can this actually happen? Interwikis shouldn't be parsed.
 628                         $namepace .= ':';
 629                 }
 630                 $url = str_replace( '$1', $namespace . $this->mUrlform, $baseUrl );
 631                 if( $query != '' ) {
 632                         if( false === strpos( $url, '?' ) ) {
 633                                 $url .= '?';
 634                         } else {
 635                                 $url .= '&';
 636                         }
 637                         $url .= $query;
 638                 }
 639                 if ( '' != $this->mFragment ) {
 640                         $url .= '#' . $this->mFragment;
 641                 }
 642                 return $url;
 643         }
 644
 645         /**
 646          * Get a relative directory for putting an HTML version of this article into
 647          */
 648         function getHashedDirectory() {
 649                 global $wgMakeDumpLinks, $wgInputEncoding;
 650                 $dbkey = $this->getDBkey();
 651
 652                 # Split into characters
 653                 if ( $wgInputEncoding == 'UTF-8' ) {
 654                         preg_match_all( '/./us', $dbkey, $m );
 655                 } else {
 656                         preg_match_all( '/./s', $dbkey, $m );
 657                 }
 658                 $chars = $m[0];
 659                 $length = count( $chars );
 660                 $dir = '';
 661
 662                 for ( $i = 0; $i < $wgMakeDumpLinks; $i++ ) {
 663                         if ( $i ) {
 664                                 $dir .= '/';
 665                         }
 666                         if ( $i >= $length ) {
 667                                 $dir .= '_';
 668                         } elseif ( ord( $chars[$i] ) > 32 ) {
 669                                 $dir .= strtolower( $chars[$i] );
 670                         } else {
 671                                 $dir .= sprintf( "%02X", ord( $chars[$i] ) );
 672                         }
 673                 }
 674                 return $dir;
 675         }
 676
 677         function getHashedFilename() {
 678                 $dbkey = $this->getPrefixedDBkey();
 679                 $mainPage = Title::newMainPage();
 680                 if ( $mainPage->getPrefixedDBkey() == $dbkey ) {
 681                         return 'index.html';
 682                 }
 683
 684                 $dir = $this->getHashedDirectory();
 685
 686                 # Replace illegal charcters for Windows paths with underscores
 687                 $friendlyName = strtr( $dbkey, '/\\*?"<>|~', '_________' );
 688
 689                 # Work out lower case form. We assume we're on a system with case-insensitive
 690                 # filenames, so unless the case is of a special form, we have to disambiguate
 691                 $lowerCase = $this->prefix( ucfirst( strtolower( $this->getDBkey() ) ) );
 692
 693                 # Make it mostly unique
 694                 if ( $lowerCase != $friendlyName  ) {
 695                         $friendlyName .= '_' . substr(md5( $dbkey ), 0, 4);
 696                 }
 697                 # Handle colon specially by replacing it with tilde
 698                 # Thus we reduce the number of paths with hashes appended
 699                 $friendlyName = str_replace( ':', '~', $friendlyName );
 700                 return "$dir/$friendlyName.html";
 701         }
 702
 703         /**
 704          * Get a URL with no fragment or server name
 705          * @param string $query an optional query string; if not specified,
 706          *      $wgArticlePath will be used.
 707          * @return string the URL
 708          * @access public
 709          */
 710         function getLocalURL( $query = '' ) {
 711                 global $wgLang, $wgArticlePath, $wgScript, $wgMakeDumpLinks;
 712
 713                 if ( $this->isExternal() ) {
 714                         return $this->getFullURL();
 715                 }
 716
 717                 $dbkey = wfUrlencode( $this->getPrefixedDBkey() );
 718                 if ( $wgMakeDumpLinks ) {
 719                         $url = str_replace( '$1', wfUrlencode( $this->getHashedFilename() ), $wgArticlePath );
 720                 } elseif ( $query == '' ) {
 721                         $url = str_replace( '$1', $dbkey, $wgArticlePath );
 722                 } else {
 723                         global $wgActionPaths;
 724                         if( !empty( $wgActionPaths ) &&
 725                                 preg_match( '/^(.*&|)action=([^&]*)(&(.*)|)$/', $query, $matches ) ) {
 726                                 $action = urldecode( $matches[2] );
 727                                 if( isset( $wgActionPaths[$action] ) ) {
 728                                         $query = $matches[1];
 729                                         if( isset( $matches[4] ) ) $query .= $matches[4];
 730                                         $url = str_replace( '$1', $dbkey, $wgActionPaths[$action] );
 731                                         if( $query != '' ) $url .= '?' . $query;
 732                                         return $url;
 733                                 }
 734                         }
 735                         if ( $query == '-' ) {
 736                                 $query = '';
 737                         }
 738                         $url = "{$wgScript}?title={$dbkey}&{$query}";
 739                 }
 740                 return $url;
 741         }
 742
 743         /**
 744          * Get an HTML-escaped version of the URL form, suitable for
 745          * using in a link, without a server name or fragment
 746          * @param string $query an optional query string
 747          * @return string the URL
 748          * @access public
 749          */
 750         function escapeLocalURL( $query = '' ) {
 751                 return htmlspecialchars( $this->getLocalURL( $query ) );
 752         }
 753
 754         /**
 755          * Get an HTML-escaped version of the URL form, suitable for
 756          * using in a link, including the server name and fragment
 757          *
 758          * @return string the URL
 759          * @param string $query an optional query string
 760          * @access public
 761          */
 762         function escapeFullURL( $query = '' ) {
 763                 return htmlspecialchars( $this->getFullURL( $query ) );
 764         }
 765
 766         /**
 767          * Get the URL form for an internal link.
 768          * - Used in various Squid-related code, in case we have a different
 769          * internal hostname for the server from the exposed one.
 770          *
 771          * @param string $query an optional query string
 772          * @return string the URL
 773          * @access public
 774          */
 775         function getInternalURL( $query = '' ) {
 776                 global $wgInternalServer;
 777                 return $wgInternalServer . $this->getLocalURL( $query );
 778         }
 779
 780         /**
 781          * Get the edit URL for this Title
 782          * @return string the URL, or a null string if this is an
 783          *      interwiki link
 784          * @access public
 785          */
 786         function getEditURL() {
 787                 global $wgServer, $wgScript;
 788
 789                 if ( '' != $this->mInterwiki ) { return ''; }
 790                 $s = $this->getLocalURL( 'action=edit' );
 791
 792                 return $s;
 793         }
 794
 795         /**
 796          * Get the HTML-escaped displayable text form.
 797          * Used for the title field in <a> tags.
 798          * @return string the text, including any prefixes
 799          * @access public
 800          */
 801         function getEscapedText() {
 802                 return htmlspecialchars( $this->getPrefixedText() );
 803         }
 804
 805         /**
 806          * Is this Title interwiki?
 807          * @return boolean
 808          * @access public
 809          */
 810         function isExternal() { return ( '' != $this->mInterwiki ); }
 811
 812         /**
 813          * Does the title correspond to a protected article?
 814          * @param string $what the action the page is protected from,
 815          *      by default checks move and edit
 816          * @return boolean
 817          * @access public
 818          */
 819         function isProtected($action = '') {
 820                 if ( -1 == $this->mNamespace ) { return true; }
 821                 if($action == 'edit' || $action == '') {
 822                         $a = $this->getRestrictions("edit");
 823                         if ( in_array( 'sysop', $a ) ) { return true; }
 824                 }
 825                 if($action == 'move' || $action == '') {
 826                         $a = $this->getRestrictions("move");
 827                         if ( in_array( 'sysop', $a ) ) { return true; }
 828                 }
 829                 return false;
 830         }
 831
 832         /**
 833          * Is $wgUser is watching this page?
 834          * @return boolean
 835          * @access public
 836          */
 837         function userIsWatching() {
 838                 global $wgUser;
 839
 840                 if ( is_null( $this->mWatched ) ) {
 841                         if ( -1 == $this->mNamespace || 0 == $wgUser->getID()) {
 842                                 $this->mWatched = false;
 843                         } else {
 844                                 $this->mWatched = $wgUser->isWatched( $this );
 845                         }
 846                 }
 847                 return $this->mWatched;
 848         }
 849
 850         /**
 851          * Is $wgUser perform $action this page?
 852          * @param string $action action that permission needs to be checked for
 853          * @return boolean
 854          * @access private
 855          */
 856         function userCan($action) {
 857                 $fname = 'Title::userCanEdit';
 858                 wfProfileIn( $fname );
 859
 860                 global $wgUser;
 861                 if( NS_SPECIAL == $this->mNamespace ) {
 862                         wfProfileOut( $fname );
 863                         return false;
 864                 }
 865                 if( NS_MEDIAWIKI == $this->mNamespace &&
 866                     !$wgUser->isAllowed('editinterface') ) {
 867                         wfProfileOut( $fname );
 868                         return false;
 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( $action == 'move' && !$this->isMovable() ) {
 907                         wfProfileOut( $fname );
 908                         return false;
 909                 }
 910
 911                 wfProfileOut( $fname );
 912                 return true;
 913         }
 914
 915         /**
 916          * Can $wgUser edit this page?
 917          * @return boolean
 918          * @access public
 919          */
 920         function userCanEdit() {
 921                 return $this->userCan('edit');
 922         }
 923
 924         /**
 925          * Can $wgUser move this page?
 926          * @return boolean
 927          * @access public
 928          */
 929         function userCanMove() {
 930                 return $this->userCan('move');
 931         }
 932
 933         /**
 934          * Would anybody with sufficient privileges be able to move this page?
 935          * Some pages just aren't movable.
 936          *
 937          * @return boolean
 938          * @access public
 939          */
 940         function isMovable() {
 941                 return Namespace::isMovable( $this->getNamespace() )
 942                         && $this->getInterwiki() == '';
 943         }
 944
 945         /**
 946          * Can $wgUser read this page?
 947          * @return boolean
 948          * @access public
 949          */
 950         function userCanRead() {
 951                 global $wgUser;
 952
 953                 if( $wgUser->isAllowed('read') ) {
 954                         return true;
 955                 } else {
 956                         global $wgWhitelistRead;
 957
 958                         /** If anon users can create an account,
 959                             they need to reach the login page first! */
 960                         if( $wgUser->isAllowed( 'createaccount' )
 961                             && $this->getNamespace() == NS_SPECIAL
 962                             && $this->getText() == 'Userlogin' ) {
 963                                 return true;
 964                         }
 965
 966                         /** some pages are explicitly allowed */
 967                         $name = $this->getPrefixedText();
 968                         if( $wgWhitelistRead && in_array( $name, $wgWhitelistRead ) ) {
 969                                 return true;
 970                         }
 971
 972                         # Compatibility with old settings
 973                         if( $wgWhitelistRead && $this->getNamespace() == NS_MAIN ) {
 974                                 if( in_array( ':' . $name, $wgWhitelistRead ) ) {
 975                                         return true;
 976                                 }
 977                         }
 978                 }
 979                 return false;
 980         }
 981
 982         /**
 983          * Is this a talk page of some sort?
 984          * @return bool
 985          * @access public
 986          */
 987         function isTalkPage() {
 988                 return Namespace::isTalk( $this->getNamespace() );
 989         }
 990
 991         /**
 992          * Is this a .css or .js subpage of a user page?
 993          * @return bool
 994          * @access public
 995          */
 996         function isCssJsSubpage() {
 997                 return ( NS_USER == $this->mNamespace and preg_match("/\\.(css|js)$/", $this->mTextform ) );
 998         }
 999         /**
1000          * Is this a .css subpage of a user page?
1001          * @return bool
1002          * @access public
1003          */
1004         function isCssSubpage() {
1005                 return ( NS_USER == $this->mNamespace and preg_match("/\\.css$/", $this->mTextform ) );
1006         }
1007         /**
1008          * Is this a .js subpage of a user page?
1009          * @return bool
1010          * @access public
1011          */
1012         function isJsSubpage() {
1013                 return ( NS_USER == $this->mNamespace and preg_match("/\\.js$/", $this->mTextform ) );
1014         }
1015         /**
1016          * Protect css/js subpages of user pages: can $wgUser edit
1017          * this page?
1018          *
1019          * @return boolean
1020          * @todo XXX: this might be better using restrictions
1021          * @access public
1022          */
1023         function userCanEditCssJsSubpage() {
1024                 global $wgUser;
1025                 return ( $wgUser->isAllowed('editinterface') or preg_match('/^'.preg_quote($wgUser->getName(), '/').'\//', $this->mTextform) );
1026         }
1027
1028         /**
1029          * Loads a string into mRestrictions array
1030          * @param string $res restrictions in string format
1031          * @access public
1032          */
1033         function loadRestrictions( $res ) {
1034                 foreach( explode( ':', trim( $res ) ) as $restrict ) {
1035                         $temp = explode( '=', trim( $restrict ) );
1036                         if(count($temp) == 1) {
1037                                 // old format should be treated as edit/move restriction
1038                                 $this->mRestrictions["edit"] = explode( ',', trim( $temp[0] ) );
1039                                 $this->mRestrictions["move"] = explode( ',', trim( $temp[0] ) );
1040                         } else {
1041                                 $this->mRestrictions[$temp[0]] = explode( ',', trim( $temp[1] ) );
1042                         }
1043                 }
1044                 $this->mRestrictionsLoaded = true;
1045         }
1046
1047         /**
1048          * Accessor/initialisation for mRestrictions
1049          * @param string $action action that permission needs to be checked for
1050          * @return array the array of groups allowed to edit this article
1051          * @access public
1052          */
1053         function getRestrictions($action) {
1054                 $id = $this->getArticleID();
1055                 if ( 0 == $id ) { return array(); }
1056
1057                 if ( ! $this->mRestrictionsLoaded ) {
1058                         $dbr =& wfGetDB( DB_SLAVE );
1059                         $res = $dbr->selectField( 'page', 'page_restrictions', 'page_id='.$id );
1060                         $this->loadRestrictions( $res );
1061                 }
1062                 if( isset( $this->mRestrictions[$action] ) ) {
1063                         return $this->mRestrictions[$action];
1064                 }
1065                 return array();
1066         }
1067
1068         /**
1069          * Is there a version of this page in the deletion archive?
1070          * @return int the number of archived revisions
1071          * @access public
1072          */
1073         function isDeleted() {
1074                 $fname = 'Title::isDeleted';
1075                 if ( $this->getNamespace() < 0 ) {
1076                         $n = 0;
1077                 } else {
1078                         $dbr =& wfGetDB( DB_SLAVE );
1079                         $n = $dbr->selectField( 'archive', 'COUNT(*)', array( 'ar_namespace' => $this->getNamespace(),
1080                                 'ar_title' => $this->getDBkey() ), $fname );
1081                 }
1082                 return (int)$n;
1083         }
1084
1085         /**
1086          * Get the article ID for this Title from the link cache,
1087          * adding it if necessary
1088          * @param int $flags a bit field; may be GAID_FOR_UPDATE to select
1089          *      for update
1090          * @return int the ID
1091          * @access public
1092          */
1093         function getArticleID( $flags = 0 ) {
1094                 global $wgLinkCache;
1095
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         /**
1109          * This clears some fields in this object, and clears any associated
1110          * keys in the "bad links" section of $wgLinkCache.
1111          *
1112          * - This is called from Article::insertNewArticle() to allow
1113          * loading of the new page_id. It's also called from
1114          * Article::doDeleteArticle()
1115          *
1116          * @param int $newid the new Article ID
1117          * @access public
1118          */
1119         function resetArticleID( $newid ) {
1120                 global $wgLinkCache;
1121                 $wgLinkCache->clearBadLink( $this->getPrefixedDBkey() );
1122
1123                 if ( 0 == $newid ) { $this->mArticleID = -1; }
1124                 else { $this->mArticleID = $newid; }
1125                 $this->mRestrictionsLoaded = false;
1126                 $this->mRestrictions = array();
1127         }
1128
1129         /**
1130          * Updates page_touched for this page; called from LinksUpdate.php
1131          * @return bool true if the update succeded
1132          * @access public
1133          */
1134         function invalidateCache() {
1135                 if ( wfReadOnly() ) {
1136                         return;
1137                 }
1138
1139                 $now = wfTimestampNow();
1140                 $dbw =& wfGetDB( DB_MASTER );
1141                 $success = $dbw->update( 'page',
1142                         array( /* SET */
1143                                 'page_touched' => $dbw->timestamp()
1144                         ), array( /* WHERE */
1145                                 'page_namespace' => $this->getNamespace() ,
1146                                 'page_title' => $this->getDBkey()
1147                         ), 'Title::invalidateCache'
1148                 );
1149                 return $success;
1150         }
1151
1152         /**
1153          * Prefix some arbitrary text with the namespace or interwiki prefix
1154          * of this object
1155          *
1156          * @param string $name the text
1157          * @return string the prefixed text
1158          * @access private
1159          */
1160         /* private */ function prefix( $name ) {
1161                 global $wgContLang;
1162
1163                 $p = '';
1164                 if ( '' != $this->mInterwiki ) {
1165                         $p = $this->mInterwiki . ':';
1166                 }
1167                 if ( 0 != $this->mNamespace ) {
1168                         $p .= $wgContLang->getNsText( $this->mNamespace ) . ':';
1169                 }
1170                 return $p . $name;
1171         }
1172
1173         /**
1174          * Secure and split - main initialisation function for this object
1175          *
1176          * Assumes that mDbkeyform has been set, and is urldecoded
1177          * and uses underscores, but not otherwise munged.  This function
1178          * removes illegal characters, splits off the interwiki and
1179          * namespace prefixes, sets the other forms, and canonicalizes
1180          * everything.
1181          * @return bool true on success
1182          * @access private
1183          */
1184         /* private */ function secureAndSplit() {
1185                 global $wgContLang, $wgLocalInterwiki, $wgCapitalLinks;
1186                 $fname = 'Title::secureAndSplit';
1187                 wfProfileIn( $fname );
1188
1189                 # Initialisation
1190                 static $rxTc = false;
1191                 if( !$rxTc ) {
1192                         # % is needed as well
1193                         $rxTc = '/[^' . Title::legalChars() . ']|%[0-9A-Fa-f]{2}/S';
1194                 }
1195
1196                 $this->mInterwiki = $this->mFragment = '';
1197                 $this->mNamespace = $this->mDefaultNamespace; # Usually NS_MAIN
1198
1199                 # Clean up whitespace
1200                 #
1201                 $t = preg_replace( '/[ _]+/', '_', $this->mDbkeyform );
1202                 $t = trim( $t, '_' );
1203
1204                 if ( '' == $t ) {
1205                         wfProfileOut( $fname );
1206                         return false;
1207                 }
1208
1209                 if( false !== strpos( $t, UTF8_REPLACEMENT ) ) {
1210                         # Contained illegal UTF-8 sequences or forbidden Unicode chars.
1211                         wfProfileOut( $fname );
1212                         return false;
1213                 }
1214
1215                 $this->mDbkeyform = $t;
1216
1217                 # Initial colon indicating main namespace
1218                 if ( ':' == $t{0} ) {
1219                         $r = substr( $t, 1 );
1220                         $this->mNamespace = NS_MAIN;
1221                 } else {
1222                         # Namespace or interwiki prefix
1223                         $firstPass = true;
1224                         do {
1225                                 if ( preg_match( "/^(.+?)_*:_*(.*)$/S", $t, $m ) ) {
1226                                         $p = $m[1];
1227                                         $lowerNs = strtolower( $p );
1228                                         if ( $ns = Namespace::getCanonicalIndex( $lowerNs ) ) {
1229                                                 # Canonical namespace
1230                                                 $t = $m[2];
1231                                                 $this->mNamespace = $ns;
1232                                         } elseif ( $ns = $wgContLang->getNsIndex( $lowerNs )) {
1233                                                 # Ordinary namespace
1234                                                 $t = $m[2];
1235                                                 $this->mNamespace = $ns;
1236                                         } elseif( $this->getInterwikiLink( $p ) ) {
1237                                                 if( !$firstPass ) {
1238                                                         # Can't make a local interwiki link to an interwiki link.
1239                                                         # That's just crazy!
1240                                                         wfProfileOut( $fname );
1241                                                         return false;
1242                                                 }
1243
1244                                                 # Interwiki link
1245                                                 $t = $m[2];
1246                                                 $this->mInterwiki = $p;
1247
1248                                                 # Redundant interwiki prefix to the local wiki
1249                                                 if ( 0 == strcasecmp( $this->mInterwiki, $wgLocalInterwiki ) ) {
1250                                                         if( $t == '' ) {
1251                                                                 # Can't have an empty self-link
1252                                                                 wfProfileOut( $fname );
1253                                                                 return false;
1254                                                         }
1255                                                         $this->mInterwiki = '';
1256                                                         $firstPass = false;
1257                                                         # Do another namespace split...
1258                                                         continue;
1259                                                 }
1260                                         }
1261                                         # If there's no recognized interwiki or namespace,
1262                                         # then let the colon expression be part of the title.
1263                                 }
1264                                 break;
1265                         } while( true );
1266                         $r = $t;
1267                 }
1268
1269                 # We already know that some pages won't be in the database!
1270                 #
1271                 if ( '' != $this->mInterwiki || -1 == $this->mNamespace ) {
1272                         $this->mArticleID = 0;
1273                 }
1274                 $f = strstr( $r, '#' );
1275                 if ( false !== $f ) {
1276                         $this->mFragment = substr( $f, 1 );
1277                         $r = substr( $r, 0, strlen( $r ) - strlen( $f ) );
1278                         # remove whitespace again: prevents "Foo_bar_#"
1279                         # becoming "Foo_bar_"
1280                         $r = preg_replace( '/_*$/', '', $r );
1281                 }
1282
1283                 # Reject illegal characters.
1284                 #
1285                 if( preg_match( $rxTc, $r ) ) {
1286                         wfProfileOut( $fname );
1287                         return false;
1288                 }
1289
1290                 /**
1291                  * Pages with "/./" or "/../" appearing in the URLs will
1292                  * often be unreachable due to the way web browsers deal
1293                  * with 'relative' URLs. Forbid them explicitly.
1294                  */
1295                 if ( strpos( $r, '.' ) !== false &&
1296                      ( $r === '.' || $r === '..' ||
1297                        strpos( $r, './' ) === 0  ||
1298                        strpos( $r, '../' ) === 0 ||
1299                        strpos( $r, '/./' ) !== false ||
1300                        strpos( $r, '/../' ) !== false ) )
1301                 {
1302                         wfProfileOut( $fname );
1303                         return false;
1304                 }
1305
1306                 # We shouldn't need to query the DB for the size.
1307                 #$maxSize = $dbr->textFieldSize( 'page', 'page_title' );
1308                 if ( strlen( $r ) > 255 ) {
1309                         wfProfileOut( $fname );
1310                         return false;
1311                 }
1312
1313                 /**
1314                  * Normally, all wiki links are forced to have
1315                  * an initial capital letter so [[foo]] and [[Foo]]
1316                  * point to the same place.
1317                  *
1318                  * Don't force it for interwikis, since the other
1319                  * site might be case-sensitive.
1320                  */
1321                 if( $wgCapitalLinks && $this->mInterwiki == '') {
1322                         $t = $wgContLang->ucfirst( $r );
1323                 } else {
1324                         $t = $r;
1325                 }
1326
1327                 /**
1328                  * Can't make a link to a namespace alone...
1329                  * "empty" local links can only be self-links
1330                  * with a fragment identifier.
1331                  */
1332                 if( $t == '' &&
1333                         $this->mInterwiki == '' &&
1334                         $this->mNamespace != NS_MAIN ) {
1335                         wfProfileOut( $fname );
1336                         return false;
1337                 }
1338
1339                 # Fill fields
1340                 $this->mDbkeyform = $t;
1341                 $this->mUrlform = wfUrlencode( $t );
1342
1343                 $this->mTextform = str_replace( '_', ' ', $t );
1344
1345                 wfProfileOut( $fname );
1346                 return true;
1347         }
1348
1349         /**
1350          * Get a Title object associated with the talk page of this article
1351          * @return Title the object for the talk page
1352          * @access public
1353          */
1354         function getTalkPage() {
1355                 return Title::makeTitle( Namespace::getTalk( $this->getNamespace() ), $this->getDBkey() );
1356         }
1357
1358         /**
1359          * Get a title object associated with the subject page of this
1360          * talk page
1361          *
1362          * @return Title the object for the subject page
1363          * @access public
1364          */
1365         function getSubjectPage() {
1366                 return Title::makeTitle( Namespace::getSubject( $this->getNamespace() ), $this->getDBkey() );
1367         }
1368
1369         /**
1370          * Get an array of Title objects linking to this Title
1371          * Also stores the IDs in the link cache.
1372          *
1373          * @param string $options may be FOR UPDATE
1374          * @return array the Title objects linking here
1375          * @access public
1376          */
1377         function getLinksTo( $options = '' ) {
1378                 global $wgLinkCache;
1379                 $id = $this->getArticleID();
1380
1381                 if ( $options ) {
1382                         $db =& wfGetDB( DB_MASTER );
1383                 } else {
1384                         $db =& wfGetDB( DB_SLAVE );
1385                 }
1386
1387                 $res = $db->select( array( 'page', 'pagelinks' ),
1388                         array( 'page_namespace', 'page_title', 'page_id' ),
1389                         array(
1390                                 'pl_from=page_id',
1391                                 'pl_namespace' => $this->getNamespace(),
1392                                 'pl_title'     => $this->getDbKey() ),
1393                         'Title::getLinksTo',
1394                         $options );
1395
1396                 $retVal = array();
1397                 if ( $db->numRows( $res ) ) {
1398                         while ( $row = $db->fetchObject( $res ) ) {
1399                                 if ( $titleObj = Title::makeTitle( $row->page_namespace, $row->page_title ) ) {
1400                                         $wgLinkCache->addGoodLinkObj( $row->page_id, $titleObj );
1401                                         $retVal[] = $titleObj;
1402                                 }
1403                         }
1404                 }
1405                 $db->freeResult( $res );
1406                 return $retVal;
1407         }
1408
1409         /**
1410          * Get an array of Title objects referring to non-existent articles linked from this page
1411          *
1412          * @param string $options may be FOR UPDATE
1413          * @return array the Title objects
1414          * @access public
1415          */
1416         function getBrokenLinksFrom( $options = '' ) {
1417                 global $wgLinkCache;
1418
1419                 if ( $options ) {
1420                         $db =& wfGetDB( DB_MASTER );
1421                 } else {
1422                         $db =& wfGetDB( DB_SLAVE );
1423                 }
1424
1425                 $res = $db->safeQuery(
1426                           "SELECT pl_namespace, pl_title
1427                              FROM !
1428                         LEFT JOIN !
1429                                ON pl_namespace=page_namespace
1430                               AND pl_title=page_title
1431                             WHERE pl_from=?
1432                               AND page_namespace IS NULL
1433                                   !",
1434                         $db->tableName( 'pagelinks' ),
1435                         $db->tableName( 'page' ),
1436                         $this->getArticleId(),
1437                         $options );
1438
1439                 $retVal = array();
1440                 if ( $db->numRows( $res ) ) {
1441                         while ( $row = $db->fetchObject( $res ) ) {
1442                                 $retVal[] = Title::makeTitle( $row->pl_namespace, $row->pl_title );
1443                         }
1444                 }
1445                 $db->freeResult( $res );
1446                 return $retVal;
1447         }
1448
1449
1450         /**
1451          * Get a list of URLs to purge from the Squid cache when this
1452          * page changes
1453          *
1454          * @return array the URLs
1455          * @access public
1456          */
1457         function getSquidURLs() {
1458                 return array(
1459                         $this->getInternalURL(),
1460                         $this->getInternalURL( 'action=history' )
1461                 );
1462         }
1463
1464         /**
1465          * Move this page without authentication
1466          * @param Title &$nt the new page Title
1467          * @access public
1468          */
1469         function moveNoAuth( &$nt ) {
1470                 return $this->moveTo( $nt, false );
1471         }
1472
1473         /**
1474          * Check whether a given move operation would be valid.
1475          * Returns true if ok, or a message key string for an error message
1476          * if invalid. (Scarrrrry ugly interface this.)
1477          * @param Title &$nt the new title
1478          * @param bool $auth indicates whether $wgUser's permissions
1479          *      should be checked
1480          * @return mixed true on success, message name on failure
1481          * @access public
1482          */
1483         function isValidMoveOperation( &$nt, $auth = true, $reason = '' ) {
1484                 global $wgUser;
1485                 if( !$this or !$nt ) {
1486                         return 'badtitletext';
1487                 }
1488                 if( $this->equals( $nt ) ) {
1489                         return 'selfmove';
1490                 }
1491                 if( !$this->isMovable() || !$nt->isMovable() ) {
1492                         return 'immobile_namespace';
1493                 }
1494
1495                 $fname = 'Title::move';
1496                 $oldid = $this->getArticleID();
1497                 $newid = $nt->getArticleID();
1498
1499                 if ( strlen( $nt->getDBkey() ) < 1 ) {
1500                         return 'articleexists';
1501                 }
1502                 if ( ( '' == $this->getDBkey() ) ||
1503                          ( !$oldid ) ||
1504                      ( '' == $nt->getDBkey() ) ) {
1505                         return 'badarticleerror';
1506                 }
1507
1508                 if ( $auth && (
1509                                 !$this->userCanEdit() || !$nt->userCanEdit() ||
1510                                 !$this->userCanMove() || !$nt->userCanMove() ) ) {
1511                         return 'protectedpage';
1512                 }
1513
1514                 # The move is allowed only if (1) the target doesn't exist, or
1515                 # (2) the target is a redirect to the source, and has no history
1516                 # (so we can undo bad moves right after they're done).
1517
1518                 if ( 0 != $newid ) { # Target exists; check for validity
1519                         if ( ! $this->isValidMoveTarget( $nt ) ) {
1520                                 return 'articleexists';
1521                         }
1522                 }
1523                 return true;
1524         }
1525
1526         /**
1527          * Move a title to a new location
1528          * @param Title &$nt the new title
1529          * @param bool $auth indicates whether $wgUser's permissions
1530          *      should be checked
1531          * @return mixed true on success, message name on failure
1532          * @access public
1533          */
1534         function moveTo( &$nt, $auth = true, $reason = '' ) {
1535                 $err = $this->isValidMoveOperation( $nt, $auth, $reason );
1536                 if( is_string( $err ) ) {
1537                         return $err;
1538                 }
1539
1540                 $pageid = $this->getArticleID();
1541                 if( $nt->exists() ) {
1542                         $this->moveOverExistingRedirect( $nt, $reason );
1543                         $pageCountChange = 0;
1544                 } else { # Target didn't exist, do normal move.
1545                         $this->moveToNewTitle( $nt, $newid, $reason );
1546                         $pageCountChange = 1;
1547                 }
1548                 $redirid = $this->getArticleID();
1549
1550                 # Fixing category links (those without piped 'alternate' names) to be sorted under the new title
1551                 $dbw =& wfGetDB( DB_MASTER );
1552                 $categorylinks = $dbw->tableName( 'categorylinks' );
1553                 $sql = "UPDATE $categorylinks SET cl_sortkey=" . $dbw->addQuotes( $nt->getPrefixedText() ) .
1554                         " WHERE cl_from=" . $dbw->addQuotes( $pageid ) .
1555                         " AND cl_sortkey=" . $dbw->addQuotes( $this->getPrefixedText() );
1556                 $dbw->query( $sql, 'SpecialMovepage::doSubmit' );
1557
1558                 # Update watchlists
1559
1560                 $oldnamespace = $this->getNamespace() & ~1;
1561                 $newnamespace = $nt->getNamespace() & ~1;
1562                 $oldtitle = $this->getDBkey();
1563                 $newtitle = $nt->getDBkey();
1564
1565                 if( $oldnamespace != $newnamespace || $oldtitle != $newtitle ) {
1566                         WatchedItem::duplicateEntries( $this, $nt );
1567                 }
1568
1569                 # Update search engine
1570                 $u = new SearchUpdate( $pageid, $nt->getPrefixedDBkey() );
1571                 $u->doUpdate();
1572                 $u = new SearchUpdate( $redirid, $this->getPrefixedDBkey(), '' );
1573                 $u->doUpdate();
1574
1575                 # Update site_stats
1576                 if ( $this->getNamespace() == NS_MAIN and $nt->getNamespace() != NS_MAIN ) {
1577                         # Moved out of main namespace
1578                         # not viewed, edited, removing
1579                         $u = new SiteStatsUpdate( 0, 1, -1, $pageCountChange);
1580                 } elseif ( $this->getNamespace() != NS_MAIN and $nt->getNamespace() == NS_MAIN ) {
1581                         # Moved into main namespace
1582                         # not viewed, edited, adding
1583                         $u = new SiteStatsUpdate( 0, 1, +1, $pageCountChange );
1584                 } elseif ( $pageCountChange ) {
1585                         # Added redirect
1586                         $u = new SiteStatsUpdate( 0, 0, 0, 1 );
1587                 } else{
1588                         $u = false;
1589                 }
1590                 if ( $u ) {
1591                         $u->doUpdate();
1592                 }
1593
1594                 wfRunHooks( 'TitleMoveComplete', array( &$this, &$nt, &$wgUser, $pageid, $redirid ) );
1595                 return true;
1596         }
1597
1598         /**
1599          * Move page to a title which is at present a redirect to the
1600          * source page
1601          *
1602          * @param Title &$nt the page to move to, which should currently
1603          *      be a redirect
1604          * @access private
1605          */
1606         function moveOverExistingRedirect( &$nt, $reason = '' ) {
1607                 global $wgUser, $wgLinkCache, $wgUseSquid, $wgMwRedir;
1608                 $fname = 'Title::moveOverExistingRedirect';
1609                 $comment = wfMsgForContent( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() );
1610
1611                 if ( $reason ) {
1612                         $comment .= ": $reason";
1613                 }
1614
1615                 $now = wfTimestampNow();
1616                 $rand = wfRandom();
1617                 $newid = $nt->getArticleID();
1618                 $oldid = $this->getArticleID();
1619                 $dbw =& wfGetDB( DB_MASTER );
1620                 $links = $dbw->tableName( 'links' );
1621
1622                 # Delete the old redirect. We don't save it to history since
1623                 # by definition if we've got here it's rather uninteresting.
1624                 # We have to remove it so that the next step doesn't trigger
1625                 # a conflict on the unique namespace+title index...
1626                 $dbw->delete( 'page', array( 'page_id' => $newid ), $fname );
1627
1628                 # Save a null revision in the page's history notifying of the move
1629                 $nullRevision = Revision::newNullRevision( $dbw, $oldid,
1630                         wfMsg( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() ),
1631                         true );
1632                 $nullRevId = $nullRevision->insertOn( $dbw );
1633
1634                 # Change the name of the target page:
1635                 $dbw->update( 'page',
1636                         /* SET */ array(
1637                                 'page_touched'   => $dbw->timestamp($now),
1638                                 'page_namespace' => $nt->getNamespace(),
1639                                 'page_title'     => $nt->getDBkey(),
1640                                 'page_latest'    => $nullRevId,
1641                         ),
1642                         /* WHERE */ array( 'page_id' => $oldid ),
1643                         $fname
1644                 );
1645                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
1646
1647                 # Recreate the redirect, this time in the other direction.
1648                 $redirectText = $wgMwRedir->getSynonym( 0 ) . ' [[' . $nt->getPrefixedText() . "]]\n";
1649                 $redirectArticle = new Article( $this );
1650                 $newid = $redirectArticle->insertOn( $dbw );
1651                 $redirectRevision = new Revision( array(
1652                         'page'    => $newid,
1653                         'comment' => $comment,
1654                         'text'    => $redirectText ) );
1655                 $revid = $redirectRevision->insertOn( $dbw );
1656                 $redirectArticle->updateRevisionOn( $dbw, $redirectRevision, 0 );
1657                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
1658
1659                 # Log the move
1660                 $log = new LogPage( 'move' );
1661                 $log->addEntry( 'move_redir', $this, $reason, array( 1 => $nt->getPrefixedText() ) );
1662
1663                 # Now, we record the link from the redirect to the new title.
1664                 # It should have no other outgoing links...
1665                 $dbw->delete( 'pagelinks', array( 'pl_from' => $newid ), $fname );
1666                 $dbw->insert( 'pagelinks',
1667                         array(
1668                                 'pl_from'      => $newid,
1669                                 'pl_namespace' => $nt->getNamespace(),
1670                                 'pl_title'     => $nt->getDbKey() ),
1671                         $fname );
1672
1673                 # Purge squid
1674                 if ( $wgUseSquid ) {
1675                         $urls = array_merge( $nt->getSquidURLs(), $this->getSquidURLs() );
1676                         $u = new SquidUpdate( $urls );
1677                         $u->doUpdate();
1678                 }
1679         }
1680
1681         /**
1682          * Move page to non-existing title.
1683          * @param Title &$nt the new Title
1684          * @param int &$newid set to be the new article ID
1685          * @access private
1686          */
1687         function moveToNewTitle( &$nt, &$newid, $reason = '' ) {
1688                 global $wgUser, $wgLinkCache, $wgUseSquid;
1689                 global $wgMwRedir;
1690                 $fname = 'MovePageForm::moveToNewTitle';
1691                 $comment = wfMsgForContent( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() );
1692                 if ( $reason ) {
1693                         $comment .= ": $reason";
1694                 }
1695
1696                 $newid = $nt->getArticleID();
1697                 $oldid = $this->getArticleID();
1698                 $dbw =& wfGetDB( DB_MASTER );
1699                 $now = $dbw->timestamp();
1700                 wfSeedRandom();
1701                 $rand = wfRandom();
1702
1703                 # Save a null revision in the page's history notifying of the move
1704                 $nullRevision = Revision::newNullRevision( $dbw, $oldid,
1705                         wfMsg( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() ),
1706                         true );
1707                 $nullRevId = $nullRevision->insertOn( $dbw );
1708
1709                 # Rename cur entry
1710                 $dbw->update( 'page',
1711                         /* SET */ array(
1712                                 'page_touched'   => $now,
1713                                 'page_namespace' => $nt->getNamespace(),
1714                                 'page_title'     => $nt->getDBkey(),
1715                                 'page_latest'    => $nullRevId,
1716                         ),
1717                         /* WHERE */ array( 'page_id' => $oldid ),
1718                         $fname
1719                 );
1720
1721                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
1722
1723                 # Insert redirect
1724                 $redirectText = $wgMwRedir->getSynonym( 0 ) . ' [[' . $nt->getPrefixedText() . "]]\n";
1725                 $redirectArticle = new Article( $this );
1726                 $newid = $redirectArticle->insertOn( $dbw );
1727                 $redirectRevision = new Revision( array(
1728                         'page'    => $newid,
1729                         'comment' => $comment,
1730                         'text'    => $redirectText ) );
1731                 $revid = $redirectRevision->insertOn( $dbw );
1732                 $redirectArticle->updateRevisionOn( $dbw, $redirectRevision, 0 );
1733                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
1734
1735                 # Log the move
1736                 $log = new LogPage( 'move' );
1737                 $log->addEntry( 'move', $this, $reason, array( 1 => $nt->getPrefixedText()) );
1738
1739                 # Purge caches as per article creation
1740                 Article::onArticleCreate( $nt );
1741
1742                 # Record the just-created redirect's linking to the page
1743                 $dbw->insert( 'pagelinks',
1744                         array(
1745                                 'pl_from'      => $newid,
1746                                 'pl_namespace' => $nt->getNamespace(),
1747                                 'pl_title'     => $nt->getDBkey() ),
1748                         $fname );
1749
1750                 # Non-existent target may have had broken links to it; these must
1751                 # now be touched to update link coloring.
1752                 $nt->touchLinks();
1753
1754                 # Purge old title from squid
1755                 # The new title, and links to the new title, are purged in Article::onArticleCreate()
1756                 $titles = $nt->getLinksTo();
1757                 if ( $wgUseSquid ) {
1758                         $urls = $this->getSquidURLs();
1759                         foreach ( $titles as $linkTitle ) {
1760                                 $urls[] = $linkTitle->getInternalURL();
1761                         }
1762                         $u = new SquidUpdate( $urls );
1763                         $u->doUpdate();
1764                 }
1765         }
1766
1767         /**
1768          * Checks if $this can be moved to a given Title
1769          * - Selects for update, so don't call it unless you mean business
1770          *
1771          * @param Title &$nt the new title to check
1772          * @access public
1773          */
1774         function isValidMoveTarget( $nt ) {
1775
1776                 $fname = 'Title::isValidMoveTarget';
1777                 $dbw =& wfGetDB( DB_MASTER );
1778
1779                 # Is it a redirect?
1780                 $id  = $nt->getArticleID();
1781                 $obj = $dbw->selectRow( array( 'page', 'revision', 'text'),
1782                         array( 'page_is_redirect','old_text' ),
1783                         array( 'page_id' => $id, 'page_latest=rev_id', 'rev_text_id=old_id' ),
1784                         $fname, 'FOR UPDATE' );
1785
1786                 if ( !$obj || 0 == $obj->page_is_redirect ) {
1787                         # Not a redirect
1788                         return false;
1789                 }
1790
1791                 # Does the redirect point to the source?
1792                 if ( preg_match( "/\\[\\[\\s*([^\\]\\|]*)]]/", $obj->old_text, $m ) ) {
1793                         $redirTitle = Title::newFromText( $m[1] );
1794                         if( !is_object( $redirTitle ) ||
1795                                 $redirTitle->getPrefixedDBkey() != $this->getPrefixedDBkey() ) {
1796                                 return false;
1797                         }
1798                 }
1799
1800                 # Does the article have a history?
1801                 $row = $dbw->selectRow( array( 'page', 'revision'),
1802                         array( 'rev_id' ),
1803                         array( 'page_namespace' => $nt->getNamespace(),
1804                                 'page_title' => $nt->getDBkey(),
1805                                 'page_id=rev_page AND page_latest != rev_id'
1806                         ), $fname, 'FOR UPDATE'
1807                 );
1808
1809                 # Return true if there was no history
1810                 return $row === false;
1811         }
1812
1813         /**
1814          * Create a redirect; fails if the title already exists; does
1815          * not notify RC
1816          *
1817          * @param Title $dest the destination of the redirect
1818          * @param string $comment the comment string describing the move
1819          * @return bool true on success
1820          * @access public
1821          */
1822         function createRedirect( $dest, $comment ) {
1823                 global $wgUser;
1824                 if ( $this->getArticleID() ) {
1825                         return false;
1826                 }
1827
1828                 $fname = 'Title::createRedirect';
1829                 $dbw =& wfGetDB( DB_MASTER );
1830
1831                 $article = new Article( $this );
1832                 $newid = $article->insertOn( $dbw );
1833                 $revision = new Revision( array(
1834                         'page'      => $newid,
1835                         'comment'   => $comment,
1836                         'text'      => "#REDIRECT [[" . $dest->getPrefixedText() . "]]\n",
1837                         ) );
1838                 $revisionId = $revision->insertOn( $dbw );
1839                 $article->updateRevisionOn( $dbw, $revision, 0 );
1840
1841                 # Link table
1842                 $dbw->insert( 'pagelinks',
1843                         array(
1844                                 'pl_from'      => $newid,
1845                                 'pl_namespace' => $dest->getNamespace(),
1846                                 'pl_title'     => $dest->getDbKey()
1847                         ), $fname
1848                 );
1849
1850                 Article::onArticleCreate( $this );
1851                 return true;
1852         }
1853
1854         /**
1855          * Get categories to which this Title belongs and return an array of
1856          * categories' names.
1857          *
1858          * @return array an array of parents in the form:
1859          *      $parent => $currentarticle
1860          * @access public
1861          */
1862         function getParentCategories() {
1863                 global $wgContLang,$wgUser;
1864
1865                 $titlekey = $this->getArticleId();
1866                 $sk =& $wgUser->getSkin();
1867                 $parents = array();
1868                 $dbr =& wfGetDB( DB_SLAVE );
1869                 $categorylinks = $dbr->tableName( 'categorylinks' );
1870
1871                 # NEW SQL
1872                 $sql = "SELECT * FROM $categorylinks"
1873                      ." WHERE cl_from='$titlekey'"
1874                          ." AND cl_from <> '0'"
1875                          ." ORDER BY cl_sortkey";
1876
1877                 $res = $dbr->query ( $sql ) ;
1878
1879                 if($dbr->numRows($res) > 0) {
1880                         while ( $x = $dbr->fetchObject ( $res ) )
1881                                 //$data[] = Title::newFromText($wgContLang->getNSText ( NS_CATEGORY ).':'.$x->cl_to);
1882                                 $data[$wgContLang->getNSText ( NS_CATEGORY ).':'.$x->cl_to] = $this->getFullText();
1883                         $dbr->freeResult ( $res ) ;
1884                 } else {
1885                         $data = '';
1886                 }
1887                 return $data;
1888         }
1889
1890         /**
1891          * Get a tree of parent categories
1892          * @param array $children an array with the children in the keys, to check for circular refs
1893          * @return array
1894          * @access public
1895          */
1896         function getParentCategoryTree( $children = array() ) {
1897                 $parents = $this->getParentCategories();
1898
1899                 if($parents != '') {
1900                         foreach($parents as $parent => $current)
1901                         {
1902                                 if ( array_key_exists( $parent, $children ) ) {
1903                                         # Circular reference
1904                                         $stack[$parent] = array();
1905                                 } else {
1906                                         $nt = Title::newFromText($parent);
1907                                         $stack[$parent] = $nt->getParentCategoryTree( $children + array($parent => 1) );
1908                                 }
1909                         }
1910                         return $stack;
1911                 } else {
1912                         return array();
1913                 }
1914         }
1915
1916
1917         /**
1918          * Get an associative array for selecting this title from
1919          * the "cur" table
1920          *
1921          * @return array
1922          * @access public
1923          */
1924         function curCond() {
1925                 wfDebugDieBacktrace( 'curCond called' );
1926                 return array( 'cur_namespace' => $this->mNamespace, 'cur_title' => $this->mDbkeyform );
1927         }
1928
1929         /**
1930          * Get an associative array for selecting this title from the
1931          * "old" table
1932          *
1933          * @return array
1934          * @access public
1935          */
1936         function oldCond() {
1937                 wfDebugDieBacktrace( 'oldCond called' );
1938                 return array( 'old_namespace' => $this->mNamespace, 'old_title' => $this->mDbkeyform );
1939         }
1940
1941         /**
1942          * Get the revision ID of the previous revision
1943          *
1944          * @param integer $revision  Revision ID. Get the revision that was before this one.
1945          * @return interger $oldrevision|false
1946          */
1947         function getPreviousRevisionID( $revision ) {
1948                 $dbr =& wfGetDB( DB_SLAVE );
1949                 return $dbr->selectField( 'revision', 'rev_id',
1950                         'rev_page=' . IntVal( $this->getArticleId() ) .
1951                         ' AND rev_id<' . IntVal( $revision ) . ' ORDER BY rev_id DESC' );
1952         }
1953
1954         /**
1955          * Get the revision ID of the next revision
1956          *
1957          * @param integer $revision  Revision ID. Get the revision that was after this one.
1958          * @return interger $oldrevision|false
1959          */
1960         function getNextRevisionID( $revision ) {
1961                 $dbr =& wfGetDB( DB_SLAVE );
1962                 return $dbr->selectField( 'revision', 'rev_id',
1963                         'rev_page=' . IntVal( $this->getArticleId() ) .
1964                         ' AND rev_id>' . IntVal( $revision ) . ' ORDER BY rev_id' );
1965         }
1966
1967         /**
1968          * Compare with another title.
1969          *
1970          * @param Title $title
1971          * @return bool
1972          */
1973         function equals( &$title ) {
1974                 return $this->getInterwiki() == $title->getInterwiki()
1975                         && $this->getNamespace() == $title->getNamespace()
1976                         && $this->getDbkey() == $title->getDbkey();
1977         }
1978
1979         /**
1980          * Check if page exists
1981          * @return bool
1982          */
1983         function exists() {
1984                 return $this->getArticleId() != 0;
1985         }
1986
1987         /**
1988          * Should a link should be displayed as a known link, just based on its title?
1989          *
1990          * Currently, a self-link with a fragment, special pages and image pages are in
1991          * this category. Special pages never exist in the database. Some images do not
1992          * have description pages in the database, but the description page contains
1993          * useful history information that the user may want to link to.
1994          *
1995          */
1996         function isAlwaysKnown() {
1997                 return $this->isExternal() || ( 0 == $this->mNamespace && "" == $this->mDbkeyform )
1998                   || NS_SPECIAL == $this->mNamespace || NS_IMAGE == $this->mNamespace;
1999         }
2000
2001         /**
2002          * Update page_touched timestamps on pages linking to this title.
2003          * In principal, this could be backgrounded and could also do squid
2004          * purging.
2005          */
2006         function touchLinks() {
2007                 $fname = 'Title::touchLinks';
2008
2009                 $dbw =& wfGetDB( DB_MASTER );
2010
2011                 $res = $dbw->select( 'pagelinks',
2012                         array( 'pl_from' ),
2013                         array(
2014                                 'pl_namespace' => $this->getNamespace(),
2015                                 'pl_title'     => $this->getDbKey() ),
2016                         $fname );
2017                 if ( 0 == $dbw->numRows( $res ) ) {
2018                         return;
2019                 }
2020
2021                 $arr = array();
2022                 $toucharr = array();
2023                 while( $row = $dbw->fetchObject( $res ) ) {
2024                         $toucharr[] = $row->pl_from;
2025                 }
2026
2027                 $dbw->update( 'page', /* SET */ array( 'page_touched' => $dbw->timestamp() ),
2028                                                         /* WHERE */ array( 'page_id' => $toucharr ),$fname);
2029         }
2030 }
2031 ?>