MediaWiki 1.7.1 wiederhergestellt

1 files changed, 2307 insertions, 0 deletions

diff --git a/includes/Title.php b/includes/Title.php
new file mode 100644
index 00000000..bc8f69a2
--- /dev/null
+++ b/includes/Title.php
@@ -0,0 +1,2307 @@
+<?php
+/**
+ * See title.txt
+ *
+ * @package MediaWiki
+ */
+
+/** */
+require_once( 'normal/UtfNormal.php' );
+
+define ( 'GAID_FOR_UPDATE', 1 );
+
+# Title::newFromTitle maintains a cache to avoid
+# expensive re-normalization of commonly used titles.
+# On a batch operation this can become a memory leak
+# if not bounded. After hitting this many titles,
+# reset the cache.
+define( 'MW_TITLECACHE_MAX', 1000 );
+
+/**
+ * Title class
+ * - Represents a title, which may contain an interwiki designation or namespace
+ * - Can fetch various kinds of data from the database, albeit inefficiently.
+ *
+ * @package MediaWiki
+ */
+class Title {
+	/**
+	 * Static cache variables
+	 */
+	static private $titleCache=array();
+	static private $interwikiCache=array();
+	
+	
+	/**
+	 * All member variables should be considered private
+	 * Please use the accessor functions
+	 */
+
+	 /**#@+
+	 * @private
+	 */
+
+	var $mTextform;           # Text form (spaces not underscores) of the main part
+	var $mUrlform;            # URL-encoded form of the main part
+	var $mDbkeyform;          # Main part with underscores
+	var $mNamespace;          # Namespace index, i.e. one of the NS_xxxx constants
+	var $mInterwiki;          # Interwiki prefix (or null string)
+	var $mFragment;           # Title fragment (i.e. the bit after the #)
+	var $mArticleID;          # Article ID, fetched from the link cache on demand
+	var $mLatestID;         # ID of most recent revision
+	var $mRestrictions;       # Array of groups allowed to edit this article
+	                        # Only null or "sysop" are supported
+	var $mRestrictionsLoaded; # Boolean for initialisation on demand
+	var $mPrefixedText;       # Text form including namespace/interwiki, initialised on demand
+	var $mDefaultNamespace;   # Namespace index when there is no namespace
+	                    # Zero except in {{transclusion}} tags
+	var $mWatched;      # Is $wgUser watching this page? NULL if unfilled, accessed through userIsWatching()
+	/**#@-*/
+
+
+	/**
+	 * Constructor
+	 * @private
+	 */
+	/* private */ function Title() {
+		$this->mInterwiki = $this->mUrlform =
+		$this->mTextform = $this->mDbkeyform = '';
+		$this->mArticleID = -1;
+		$this->mNamespace = NS_MAIN;
+		$this->mRestrictionsLoaded = false;
+		$this->mRestrictions = array();
+		# Dont change the following, NS_MAIN is hardcoded in several place
+		# See bug #696
+		$this->mDefaultNamespace = NS_MAIN;
+		$this->mWatched = NULL;
+		$this->mLatestID = false;
+	}
+
+	/**
+	 * Create a new Title from a prefixed DB key
+	 * @param string $key The database key, which has underscores
+	 *	instead of spaces, possibly including namespace and
+	 *	interwiki prefixes
+	 * @return Title the new object, or NULL on an error
+	 * @static
+	 * @access public
+	 */
+	/* static */ function newFromDBkey( $key ) {
+		$t = new Title();
+		$t->mDbkeyform = $key;
+		if( $t->secureAndSplit() )
+			return $t;
+		else
+			return NULL;
+	}
+
+	/**
+	 * Create a new Title from text, such as what one would
+	 * find in a link. Decodes any HTML entities in the text.
+	 *
+	 * @param string $text the link text; spaces, prefixes,
+	 *	and an initial ':' indicating the main namespace
+	 *	are accepted
+	 * @param int $defaultNamespace the namespace to use if
+	 * 	none is specified by a prefix
+	 * @return Title the new object, or NULL on an error
+	 * @static
+	 * @access public
+	 */
+	function newFromText( $text, $defaultNamespace = NS_MAIN ) {
+		$fname = 'Title::newFromText';
+
+		if( is_object( $text ) ) {
+			throw new MWException( 'Title::newFromText given an object' );
+		}
+
+		/**
+		 * Wiki pages often contain multiple links to the same page.
+		 * Title normalization and parsing can become expensive on
+		 * pages with many links, so we can save a little time by
+		 * caching them.
+		 *
+		 * In theory these are value objects and won't get changed...
+		 */
+		if( $defaultNamespace == NS_MAIN && isset( Title::$titleCache[$text] ) ) {
+			return Title::$titleCache[$text];
+		}
+
+		/**
+		 * Convert things like &eacute; &#257; or &#x3017; into real text...
+		 */
+		$filteredText = Sanitizer::decodeCharReferences( $text );
+
+		$t =& new Title();
+		$t->mDbkeyform = str_replace( ' ', '_', $filteredText );
+		$t->mDefaultNamespace = $defaultNamespace;
+
+		static $cachedcount = 0 ;
+		if( $t->secureAndSplit() ) {
+			if( $defaultNamespace == NS_MAIN ) {
+				if( $cachedcount >= MW_TITLECACHE_MAX ) {
+					# Avoid memory leaks on mass operations...
+					Title::$titleCache = array();
+					$cachedcount=0;
+				}
+				$cachedcount++;
+				Title::$titleCache[$text] =& $t;
+			}
+			return $t;
+		} else {
+			$ret = NULL;
+			return $ret;
+		}
+	}
+
+	/**
+	 * Create a new Title from URL-encoded text. Ensures that
+	 * the given title's length does not exceed the maximum.
+	 * @param string $url the title, as might be taken from a URL
+	 * @return Title the new object, or NULL on an error
+	 * @static
+	 * @access public
+	 */
+	function newFromURL( $url ) {
+		global $wgLegalTitleChars;
+		$t = new Title();
+
+		# For compatibility with old buggy URLs. "+" is usually not valid in titles,
+		# but some URLs used it as a space replacement and they still come
+		# from some external search tools.
+		if ( strpos( $wgLegalTitleChars, '+' ) === false ) {
+			$url = str_replace( '+', ' ', $url );
+		}
+
+		$t->mDbkeyform = str_replace( ' ', '_', $url );
+		if( $t->secureAndSplit() ) {
+			return $t;
+		} else {
+			return NULL;
+		}
+	}
+
+	/**
+	 * Create a new Title from an article ID
+	 *
+	 * @todo This is inefficiently implemented, the page row is requested
+	 *       but not used for anything else
+	 *
+	 * @param int $id the page_id corresponding to the Title to create
+	 * @return Title the new object, or NULL on an error
+	 * @access public
+	 * @static
+	 */
+	function newFromID( $id ) {
+		$fname = 'Title::newFromID';
+		$dbr =& wfGetDB( DB_SLAVE );
+		$row = $dbr->selectRow( 'page', array( 'page_namespace', 'page_title' ),
+			array( 'page_id' => $id ), $fname );
+		if ( $row !== false ) {
+			$title = Title::makeTitle( $row->page_namespace, $row->page_title );
+		} else {
+			$title = NULL;
+		}
+		return $title;
+	}
+
+	/**
+	 * Make an array of titles from an array of IDs 
+	 */
+	function newFromIDs( $ids ) {
+		$dbr =& wfGetDB( DB_SLAVE );
+		$res = $dbr->select( 'page', array( 'page_namespace', 'page_title' ),
+			'page_id IN (' . $dbr->makeList( $ids ) . ')', __METHOD__ );
+
+		$titles = array();
+		while ( $row = $dbr->fetchObject( $res ) ) {
+			$titles[] = Title::makeTitle( $row->page_namespace, $row->page_title );
+		}
+		return $titles;
+	}
+
+	/**
+	 * Create a new Title from a namespace index and a DB key.
+	 * It's assumed that $ns and $title are *valid*, for instance when
+	 * they came directly from the database or a special page name.
+	 * For convenience, spaces are converted to underscores so that
+	 * eg user_text fields can be used directly.
+	 *
+	 * @param int $ns the namespace of the article
+	 * @param string $title the unprefixed database key form
+	 * @return Title the new object
+	 * @static
+	 * @access public
+	 */
+	function &makeTitle( $ns, $title ) {
+		$t =& new Title();
+		$t->mInterwiki = '';
+		$t->mFragment = '';
+		$t->mNamespace = intval( $ns );
+		$t->mDbkeyform = str_replace( ' ', '_', $title );
+		$t->mArticleID = ( $ns >= 0 ) ? -1 : 0;
+		$t->mUrlform = wfUrlencode( $t->mDbkeyform );
+		$t->mTextform = str_replace( '_', ' ', $title );
+		return $t;
+	}
+
+	/**
+	 * Create a new Title frrom a namespace index and a DB key.
+	 * The parameters will be checked for validity, which is a bit slower
+	 * than makeTitle() but safer for user-provided data.
+	 *
+	 * @param int $ns the namespace of the article
+	 * @param string $title the database key form
+	 * @return Title the new object, or NULL on an error
+	 * @static
+	 * @access public
+	 */
+	function makeTitleSafe( $ns, $title ) {
+		$t = new Title();
+		$t->mDbkeyform = Title::makeName( $ns, $title );
+		if( $t->secureAndSplit() ) {
+			return $t;
+		} else {
+			return NULL;
+		}
+ 	}
+
+	/**
+	 * Create a new Title for the Main Page
+	 *
+	 * @static
+	 * @return Title the new object
+	 * @access public
+	 */
+	function newMainPage() {
+		return Title::newFromText( wfMsgForContent( 'mainpage' ) );
+	}
+
+	/**
+	 * Create a new Title for a redirect
+	 * @param string $text the redirect title text
+	 * @return Title the new object, or NULL if the text is not a
+	 *	valid redirect
+	 * @static
+	 * @access public
+	 */
+	function newFromRedirect( $text ) {
+		$mwRedir = MagicWord::get( MAG_REDIRECT );
+		$rt = NULL;
+		if ( $mwRedir->matchStart( $text ) ) {
+			if ( preg_match( '/\[{2}(.*?)(?:\||\]{2})/', $text, $m ) ) {
+				# categories are escaped using : for example one can enter:
+				# #REDIRECT [[:Category:Music]]. Need to remove it.
+				if ( substr($m[1],0,1) == ':') {
+					# We don't want to keep the ':'
+					$m[1] = substr( $m[1], 1 );
+				}
+
+				$rt = Title::newFromText( $m[1] );
+				# Disallow redirects to Special:Userlogout
+				if ( !is_null($rt) && $rt->getNamespace() == NS_SPECIAL && preg_match( '/^Userlogout/i', $rt->getText() ) ) {
+					$rt = NULL;
+				}
+			}
+		}
+		return $rt;
+	}
+
+#----------------------------------------------------------------------------
+#	Static functions
+#----------------------------------------------------------------------------
+
+	/**
+	 * Get the prefixed DB key associated with an ID
+	 * @param int $id the page_id of the article
+	 * @return Title an object representing the article, or NULL
+	 * 	if no such article was found
+	 * @static
+	 * @access public
+	 */
+	function nameOf( $id ) {
+		$fname = 'Title::nameOf';
+		$dbr =& wfGetDB( DB_SLAVE );
+
+		$s = $dbr->selectRow( 'page', array( 'page_namespace','page_title' ),  array( 'page_id' => $id ), $fname );
+		if ( $s === false ) { return NULL; }
+
+		$n = Title::makeName( $s->page_namespace, $s->page_title );
+		return $n;
+	}
+
+	/**
+	 * Get a regex character class describing the legal characters in a link
+	 * @return string the list of characters, not delimited
+	 * @static
+	 * @access public
+	 */
+	function legalChars() {
+		global $wgLegalTitleChars;
+		return $wgLegalTitleChars;
+	}
+
+	/**
+	 * Get a string representation of a title suitable for
+	 * including in a search index
+	 *
+	 * @param int $ns a namespace index
+	 * @param string $title text-form main part
+	 * @return string a stripped-down title string ready for the
+	 * 	search index
+	 */
+	/* static */ function indexTitle( $ns, $title ) {
+		global $wgContLang;
+
+		$lc = SearchEngine::legalSearchChars() . '&#;';
+		$t = $wgContLang->stripForSearch( $title );
+		$t = preg_replace( "/[^{$lc}]+/", ' ', $t );
+		$t = strtolower( $t );
+
+		# Handle 's, s'
+		$t = preg_replace( "/([{$lc}]+)'s( |$)/", "\\1 \\1's ", $t );
+		$t = preg_replace( "/([{$lc}]+)s'( |$)/", "\\1s ", $t );
+
+		$t = preg_replace( "/\\s+/", ' ', $t );
+
+		if ( $ns == NS_IMAGE ) {
+			$t = preg_replace( "/ (png|gif|jpg|jpeg|ogg)$/", "", $t );
+		}
+		return trim( $t );
+	}
+
+	/*
+	 * Make a prefixed DB key from a DB key and a namespace index
+	 * @param int $ns numerical representation of the namespace
+	 * @param string $title the DB key form the title
+	 * @return string the prefixed form of the title
+	 */
+	/* static */ function makeName( $ns, $title ) {
+		global $wgContLang;
+
+		$n = $wgContLang->getNsText( $ns );
+		return $n == '' ? $title : "$n:$title";
+	}
+
+	/**
+	 * Returns the URL associated with an interwiki prefix
+	 * @param string $key the interwiki prefix (e.g. "MeatBall")
+	 * @return the associated URL, containing "$1", which should be
+	 * 	replaced by an article title
+	 * @static (arguably)
+	 * @access public
+	 */
+	function getInterwikiLink( $key )  {
+		global $wgMemc, $wgDBname, $wgInterwikiExpiry;
+		global $wgInterwikiCache;
+		$fname = 'Title::getInterwikiLink';
+
+		$key = strtolower( $key );
+
+		$k = $wgDBname.':interwiki:'.$key;
+		if( array_key_exists( $k, Title::$interwikiCache ) ) {
+			return Title::$interwikiCache[$k]->iw_url;
+		}
+
+		if ($wgInterwikiCache) {
+			return Title::getInterwikiCached( $key );
+		}
+
+		$s = $wgMemc->get( $k );
+		# Ignore old keys with no iw_local
+		if( $s && isset( $s->iw_local ) && isset($s->iw_trans)) {
+			Title::$interwikiCache[$k] = $s;
+			return $s->iw_url;
+		}
+
+		$dbr =& wfGetDB( DB_SLAVE );
+		$res = $dbr->select( 'interwiki',
+			array( 'iw_url', 'iw_local', 'iw_trans' ),
+			array( 'iw_prefix' => $key ), $fname );
+		if( !$res ) {
+			return '';
+		}
+
+		$s = $dbr->fetchObject( $res );
+		if( !$s ) {
+			# Cache non-existence: create a blank object and save it to memcached
+			$s = (object)false;
+			$s->iw_url = '';
+			$s->iw_local = 0;
+			$s->iw_trans = 0;
+		}
+		$wgMemc->set( $k, $s, $wgInterwikiExpiry );
+		Title::$interwikiCache[$k] = $s;
+
+		return $s->iw_url;
+	}
+	
+	/**
+	 * Fetch interwiki prefix data from local cache in constant database
+	 *
+	 * More logic is explained in DefaultSettings
+	 *
+	 * @return string URL of interwiki site
+	 * @access public
+	 */
+	function getInterwikiCached( $key ) {
+		global $wgDBname, $wgInterwikiCache, $wgInterwikiScopes, $wgInterwikiFallbackSite;
+		static $db, $site;
+
+		if (!$db)
+			$db=dba_open($wgInterwikiCache,'r','cdb');
+		/* Resolve site name */
+		if ($wgInterwikiScopes>=3 and !$site) {
+			$site = dba_fetch("__sites:{$wgDBname}", $db);
+			if ($site=="")
+				$site = $wgInterwikiFallbackSite;
+		}
+		$value = dba_fetch("{$wgDBname}:{$key}", $db);
+		if ($value=='' and $wgInterwikiScopes>=3) {
+			/* try site-level */
+			$value = dba_fetch("_{$site}:{$key}", $db);
+		}
+		if ($value=='' and $wgInterwikiScopes>=2) {
+			/* try globals */
+			$value = dba_fetch("__global:{$key}", $db);
+		}
+		if ($value=='undef')
+			$value='';
+		$s = (object)false;
+		$s->iw_url = '';
+		$s->iw_local = 0;
+		$s->iw_trans = 0;
+		if ($value!='') {
+			list($local,$url)=explode(' ',$value,2);
+			$s->iw_url=$url;
+			$s->iw_local=(int)$local;
+		}
+		Title::$interwikiCache[$wgDBname.':interwiki:'.$key] = $s;
+		return $s->iw_url;
+	}
+	/**
+	 * Determine whether the object refers to a page within
+	 * this project.
+	 *
+	 * @return bool TRUE if this is an in-project interwiki link
+	 *	or a wikilink, FALSE otherwise
+	 * @access public
+	 */
+	function isLocal() {
+		global $wgDBname;
+
+		if ( $this->mInterwiki != '' ) {
+			# Make sure key is loaded into cache
+			$this->getInterwikiLink( $this->mInterwiki );
+			$k = $wgDBname.':interwiki:' . $this->mInterwiki;
+			return (bool)(Title::$interwikiCache[$k]->iw_local);
+		} else {
+			return true;
+		}
+	}
+
+	/**
+	 * Determine whether the object refers to a page within
+	 * this project and is transcludable.
+	 *
+	 * @return bool TRUE if this is transcludable
+	 * @access public
+	 */
+	function isTrans() {
+		global $wgDBname;
+
+		if ($this->mInterwiki == '')
+			return false;
+		# Make sure key is loaded into cache
+		$this->getInterwikiLink( $this->mInterwiki );
+		$k = $wgDBname.':interwiki:' . $this->mInterwiki;
+		return (bool)(Title::$interwikiCache[$k]->iw_trans);
+	}
+
+	/**
+	 * Update the page_touched field for an array of title objects
+	 * @todo Inefficient unless the IDs are already loaded into the
+	 *	link cache
+	 * @param array $titles an array of Title objects to be touched
+	 * @param string $timestamp the timestamp to use instead of the
+	 *	default current time
+	 * @static
+	 * @access public
+	 */
+	function touchArray( $titles, $timestamp = '' ) {
+
+		if ( count( $titles ) == 0 ) {
+			return;
+		}
+		$dbw =& wfGetDB( DB_MASTER );
+		if ( $timestamp == '' ) {
+			$timestamp = $dbw->timestamp();
+		}
+		/*
+		$page = $dbw->tableName( 'page' );
+		$sql = "UPDATE $page SET page_touched='{$timestamp}' WHERE page_id IN (";
+		$first = true;
+
+		foreach ( $titles as $title ) {
+			if ( $wgUseFileCache ) {
+				$cm = new CacheManager($title);
+				@unlink($cm->fileCacheName());
+			}
+
+			if ( ! $first ) {
+				$sql .= ',';
+			}
+			$first = false;
+			$sql .= $title->getArticleID();
+		}
+		$sql .= ')';
+		if ( ! $first ) {
+			$dbw->query( $sql, 'Title::touchArray' );
+		}
+		*/
+		// hack hack hack -- brion 2005-07-11. this was unfriendly to db.
+		// do them in small chunks:
+		$fname = 'Title::touchArray';
+		foreach( $titles as $title ) {
+			$dbw->update( 'page',
+				array( 'page_touched' => $timestamp ),
+				array(
+					'page_namespace' => $title->getNamespace(),
+					'page_title'     => $title->getDBkey() ),
+				$fname );
+		}
+	}
+
+#----------------------------------------------------------------------------
+#	Other stuff
+#----------------------------------------------------------------------------
+
+	/** Simple accessors */
+	/**
+	 * Get the text form (spaces not underscores) of the main part
+	 * @return string
+	 * @access public
+	 */
+	function getText() { return $this->mTextform; }
+	/**
+	 * Get the URL-encoded form of the main part
+	 * @return string
+	 * @access public
+	 */
+	function getPartialURL() { return $this->mUrlform; }
+	/**
+	 * Get the main part with underscores
+	 * @return string
+	 * @access public
+	 */
+	function getDBkey() { return $this->mDbkeyform; }
+	/**
+	 * Get the namespace index, i.e. one of the NS_xxxx constants
+	 * @return int
+	 * @access public
+	 */
+	function getNamespace() { return $this->mNamespace; }
+	/**
+	 * Get the namespace text
+	 * @return string
+	 * @access public
+	 */
+	function getNsText() {
+		global $wgContLang;
+		return $wgContLang->getNsText( $this->mNamespace );
+	}
+	/**
+	 * Get the namespace text of the subject (rather than talk) page
+	 * @return string
+	 * @access public
+	 */
+	function getSubjectNsText() {
+		global $wgContLang;
+		return $wgContLang->getNsText( Namespace::getSubject( $this->mNamespace ) );
+	}
+
+	/**
+	 * Get the namespace text of the talk page
+	 * @return string
+	 */
+	function getTalkNsText() {
+		global $wgContLang;
+		return( $wgContLang->getNsText( Namespace::getTalk( $this->mNamespace ) ) );
+	}
+	
+	/**
+	 * Could this title have a corresponding talk page?
+	 * @return bool
+	 */
+	function canTalk() {
+		return( Namespace::canTalk( $this->mNamespace ) );
+	}
+	
+	/**
+	 * Get the interwiki prefix (or null string)
+	 * @return string
+	 * @access public
+	 */
+	function getInterwiki() { return $this->mInterwiki; }
+	/**
+	 * Get the Title fragment (i.e. the bit after the #)
+	 * @return string
+	 * @access public
+	 */
+	function getFragment() { return $this->mFragment; }
+	/**
+	 * Get the default namespace index, for when there is no namespace
+	 * @return int
+	 * @access public
+	 */
+	function getDefaultNamespace() { return $this->mDefaultNamespace; }
+
+	/**
+	 * Get title for search index
+	 * @return string a stripped-down title string ready for the
+	 * 	search index
+	 */
+	function getIndexTitle() {
+		return Title::indexTitle( $this->mNamespace, $this->mTextform );
+	}
+
+	/**
+	 * Get the prefixed database key form
+	 * @return string the prefixed title, with underscores and
+	 * 	any interwiki and namespace prefixes
+	 * @access public
+	 */
+	function getPrefixedDBkey() {
+		$s = $this->prefix( $this->mDbkeyform );
+		$s = str_replace( ' ', '_', $s );
+		return $s;
+	}
+
+	/**
+	 * Get the prefixed title with spaces.
+	 * This is the form usually used for display
+	 * @return string the prefixed title, with spaces
+	 * @access public
+	 */
+	function getPrefixedText() {
+		if ( empty( $this->mPrefixedText ) ) { // FIXME: bad usage of empty() ?
+			$s = $this->prefix( $this->mTextform );
+			$s = str_replace( '_', ' ', $s );
+			$this->mPrefixedText = $s;
+		}
+		return $this->mPrefixedText;
+	}
+
+	/**
+	 * Get the prefixed title with spaces, plus any fragment
+	 * (part beginning with '#')
+	 * @return string the prefixed title, with spaces and
+	 * 	the fragment, including '#'
+	 * @access public
+	 */
+	function getFullText() {
+		$text = $this->getPrefixedText();
+		if( '' != $this->mFragment ) {
+			$text .= '#' . $this->mFragment;
+		}
+		return $text;
+	}
+
+	/**
+	 * Get the base name, i.e. the leftmost parts before the /
+	 * @return string Base name
+	 */
+	function getBaseText() {
+		global $wgNamespacesWithSubpages;
+		if( isset( $wgNamespacesWithSubpages[ $this->mNamespace ] ) && $wgNamespacesWithSubpages[ $this->mNamespace ] ) {
+			$parts = explode( '/', $this->getText() );
+			# Don't discard the real title if there's no subpage involved
+			if( count( $parts ) > 1 )
+				unset( $parts[ count( $parts ) - 1 ] );
+			return implode( '/', $parts );
+		} else {
+			return $this->getText();
+		}
+	}
+
+	/**
+	 * Get the lowest-level subpage name, i.e. the rightmost part after /
+	 * @return string Subpage name
+	 */
+	function getSubpageText() {
+		global $wgNamespacesWithSubpages;
+		if( isset( $wgNamespacesWithSubpages[ $this->mNamespace ] ) && $wgNamespacesWithSubpages[ $this->mNamespace ] ) {
+			$parts = explode( '/', $this->mTextform );
+			return( $parts[ count( $parts ) - 1 ] );
+		} else {
+			return( $this->mTextform );
+		}
+	}
+	
+	/**
+	 * Get a URL-encoded form of the subpage text
+	 * @return string URL-encoded subpage name
+	 */
+	function getSubpageUrlForm() {
+		$text = $this->getSubpageText();
+		$text = wfUrlencode( str_replace( ' ', '_', $text ) );
+		$text = str_replace( '%28', '(', str_replace( '%29', ')', $text ) ); # Clean up the URL; per below, this might not be safe
+		return( $text );
+	}
+
+	/**
+	 * Get a URL-encoded title (not an actual URL) including interwiki
+	 * @return string the URL-encoded form
+	 * @access public
+	 */
+	function getPrefixedURL() {
+		$s = $this->prefix( $this->mDbkeyform );
+		$s = str_replace( ' ', '_', $s );
+
+		$s = wfUrlencode ( $s ) ;
+
+		# Cleaning up URL to make it look nice -- is this safe?
+		$s = str_replace( '%28', '(', $s );
+		$s = str_replace( '%29', ')', $s );
+
+		return $s;
+	}
+
+	/**
+	 * Get a real URL referring to this title, with interwiki link and
+	 * fragment
+	 *
+	 * @param string $query an optional query string, not used
+	 * 	for interwiki links
+	 * @return string the URL
+	 * @access public
+	 */
+	function getFullURL( $query = '' ) {
+		global $wgContLang, $wgServer, $wgRequest;
+
+		if ( '' == $this->mInterwiki ) {
+			$url = $this->getLocalUrl( $query );
+
+			// Ugly quick hack to avoid duplicate prefixes (bug 4571 etc)
+			// Correct fix would be to move the prepending elsewhere.
+			if ($wgRequest->getVal('action') != 'render') {
+				$url = $wgServer . $url;
+			}
+		} else {
+			$baseUrl = $this->getInterwikiLink( $this->mInterwiki );
+
+			$namespace = $wgContLang->getNsText( $this->mNamespace );
+			if ( '' != $namespace ) {
+				# Can this actually happen? Interwikis shouldn't be parsed.
+				$namespace .= ':';
+			}
+			$url = str_replace( '$1', $namespace . $this->mUrlform, $baseUrl );
+			if( $query != '' ) {
+				if( false === strpos( $url, '?' ) ) {
+					$url .= '?';
+				} else {
+					$url .= '&';
+				}
+				$url .= $query;
+			}
+		}
+
+		# Finally, add the fragment.
+		if ( '' != $this->mFragment ) {
+			$url .= '#' . $this->mFragment;
+		}
+
+		wfRunHooks( 'GetFullURL', array( &$this, &$url, $query ) );
+		return $url;
+	}
+
+	/**
+	 * Get a URL with no fragment or server name.  If this page is generated
+	 * with action=render, $wgServer is prepended.
+	 * @param string $query an optional query string; if not specified,
+	 * 	$wgArticlePath will be used.
+	 * @return string the URL
+	 * @access public
+	 */
+	function getLocalURL( $query = '' ) {
+		global $wgArticlePath, $wgScript, $wgServer, $wgRequest;
+
+		if ( $this->isExternal() ) {
+			$url = $this->getFullURL();
+			if ( $query ) {
+				// This is currently only used for edit section links in the
+				// context of interwiki transclusion. In theory we should
+				// append the query to the end of any existing query string,
+				// but interwiki transclusion is already broken in that case.
+				$url .= "?$query";
+			}
+		} else {
+			$dbkey = wfUrlencode( $this->getPrefixedDBkey() );
+			if ( $query == '' ) {
+				$url = str_replace( '$1', $dbkey, $wgArticlePath );
+			} else {
+				global $wgActionPaths;
+				$url = false;
+				if( !empty( $wgActionPaths ) &&
+					preg_match( '/^(.*&|)action=([^&]*)(&(.*)|)$/', $query, $matches ) )
+				{
+					$action = urldecode( $matches[2] );
+					if( isset( $wgActionPaths[$action] ) ) {
+						$query = $matches[1];
+						if( isset( $matches[4] ) ) $query .= $matches[4];
+						$url = str_replace( '$1', $dbkey, $wgActionPaths[$action] );
+						if( $query != '' ) $url .= '?' . $query;
+					}
+				}
+				if ( $url === false ) {
+					if ( $query == '-' ) {
+						$query = '';
+					}
+					$url = "{$wgScript}?title={$dbkey}&{$query}";
+				}
+			}
+			
+			// FIXME: this causes breakage in various places when we
+			// actually expected a local URL and end up with dupe prefixes.
+			if ($wgRequest->getVal('action') == 'render') {
+				$url = $wgServer . $url;
+			}
+		}
+		wfRunHooks( 'GetLocalURL', array( &$this, &$url, $query ) );
+		return $url;
+	}
+
+	/**
+	 * Get an HTML-escaped version of the URL form, suitable for
+	 * using in a link, without a server name or fragment
+	 * @param string $query an optional query string
+	 * @return string the URL
+	 * @access public
+	 */
+	function escapeLocalURL( $query = '' ) {
+		return htmlspecialchars( $this->getLocalURL( $query ) );
+	}
+
+	/**
+	 * Get an HTML-escaped version of the URL form, suitable for
+	 * using in a link, including the server name and fragment
+	 *
+	 * @return string the URL
+	 * @param string $query an optional query string
+	 * @access public
+	 */
+	function escapeFullURL( $query = '' ) {
+		return htmlspecialchars( $this->getFullURL( $query ) );
+	}
+
+	/**
+	 * Get the URL form for an internal link.
+	 * - Used in various Squid-related code, in case we have a different
+	 * internal hostname for the server from the exposed one.
+	 *
+	 * @param string $query an optional query string
+	 * @return string the URL
+	 * @access public
+	 */
+	function getInternalURL( $query = '' ) {
+		global $wgInternalServer;
+		$url = $wgInternalServer . $this->getLocalURL( $query );
+		wfRunHooks( 'GetInternalURL', array( &$this, &$url, $query ) );
+		return $url;
+	}
+
+	/**
+	 * Get the edit URL for this Title
+	 * @return string the URL, or a null string if this is an
+	 * 	interwiki link
+	 * @access public
+	 */
+	function getEditURL() {
+		if ( '' != $this->mInterwiki ) { return ''; }
+		$s = $this->getLocalURL( 'action=edit' );
+
+		return $s;
+	}
+
+	/**
+	 * Get the HTML-escaped displayable text form.
+	 * Used for the title field in <a> tags.
+	 * @return string the text, including any prefixes
+	 * @access public
+	 */
+	function getEscapedText() {
+		return htmlspecialchars( $this->getPrefixedText() );
+	}
+
+	/**
+	 * Is this Title interwiki?
+	 * @return boolean
+	 * @access public
+	 */
+	function isExternal() { return ( '' != $this->mInterwiki ); }
+
+	/**
+	 * Is this page "semi-protected" - the *only* protection is autoconfirm?
+	 *
+	 * @param string Action to check (default: edit)
+	 * @return bool
+	 */
+	function isSemiProtected( $action = 'edit' ) {
+		$restrictions = $this->getRestrictions( $action );
+		# We do a full compare because this could be an array
+		foreach( $restrictions as $restriction ) {
+			if( strtolower( $restriction ) != 'autoconfirmed' ) {
+				return( false );
+			}
+		}
+		return( true );
+	}
+
+	/**
+	 * Does the title correspond to a protected article?
+	 * @param string $what the action the page is protected from,
+	 *	by default checks move and edit
+	 * @return boolean
+	 * @access public
+	 */
+	function isProtected( $action = '' ) {
+		global $wgRestrictionLevels;
+		if ( -1 == $this->mNamespace ) { return true; }
+				
+		if( $action == 'edit' || $action == '' ) {
+			$r = $this->getRestrictions( 'edit' );
+			foreach( $wgRestrictionLevels as $level ) {
+				if( in_array( $level, $r ) && $level != '' ) {
+					return( true );
+				}
+			}
+		}
+		
+		if( $action == 'move' || $action == '' ) {
+			$r = $this->getRestrictions( 'move' );
+			foreach( $wgRestrictionLevels as $level ) {
+				if( in_array( $level, $r ) && $level != '' ) {
+					return( true );
+				}
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	 * Is $wgUser is watching this page?
+	 * @return boolean
+	 * @access public
+	 */
+	function userIsWatching() {
+		global $wgUser;
+
+		if ( is_null( $this->mWatched ) ) {
+			if ( -1 == $this->mNamespace || 0 == $wgUser->getID()) {
+				$this->mWatched = false;
+			} else {
+				$this->mWatched = $wgUser->isWatched( $this );
+			}
+		}
+		return $this->mWatched;
+	}
+
+ 	/**
+	 * Can $wgUser perform $action this page?
+	 * @param string $action action that permission needs to be checked for
+	 * @return boolean
+	 * @private
+ 	 */
+	function userCan($action) {
+		$fname = 'Title::userCan';
+		wfProfileIn( $fname );
+
+		global $wgUser;
+
+		$result = null;
+		wfRunHooks( 'userCan', array( &$this, &$wgUser, $action, &$result ) );
+		if ( $result !== null ) {
+			wfProfileOut( $fname );
+			return $result;
+		}
+
+		if( NS_SPECIAL == $this->mNamespace ) {
+			wfProfileOut( $fname );
+			return false;
+		}
+		// XXX: This is the code that prevents unprotecting a page in NS_MEDIAWIKI
+		// from taking effect -ævar
+		if( NS_MEDIAWIKI == $this->mNamespace &&
+		    !$wgUser->isAllowed('editinterface') ) {
+			wfProfileOut( $fname );
+			return false;
+		}
+
+		if( $this->mDbkeyform == '_' ) {
+			# FIXME: Is this necessary? Shouldn't be allowed anyway...
+			wfProfileOut( $fname );
+			return false;
+		}
+
+		# protect css/js subpages of user pages
+		# XXX: this might be better using restrictions
+		# XXX: Find a way to work around the php bug that prevents using $this->userCanEditCssJsSubpage() from working
+		if( NS_USER == $this->mNamespace
+			&& preg_match("/\\.(css|js)$/", $this->mTextform )
+			&& !$wgUser->isAllowed('editinterface')
+			&& !preg_match('/^'.preg_quote($wgUser->getName(), '/').'\//', $this->mTextform) ) {
+			wfProfileOut( $fname );
+			return false;
+		}
+
+		foreach( $this->getRestrictions($action) as $right ) {
+			// Backwards compatibility, rewrite sysop -> protect
+			if ( $right == 'sysop' ) {
+				$right = 'protect';
+			}
+			if( '' != $right && !$wgUser->isAllowed( $right ) ) {
+				wfProfileOut( $fname );
+				return false;
+			}
+		}
+
+		if( $action == 'move' &&
+			!( $this->isMovable() && $wgUser->isAllowed( 'move' ) ) ) {
+			wfProfileOut( $fname );
+			return false;
+		}
+
+		if( $action == 'create' ) {
+			if( (  $this->isTalkPage() && !$wgUser->isAllowed( 'createtalk' ) ) ||
+				( !$this->isTalkPage() && !$wgUser->isAllowed( 'createpage' ) ) ) {
+				return false;
+			}
+		}
+
+		wfProfileOut( $fname );
+		return true;
+	}
+
+	/**
+	 * Can $wgUser edit this page?
+	 * @return boolean
+	 * @access public
+	 */
+	function userCanEdit() {
+		return $this->userCan('edit');
+	}
+
+	/**
+	 * Can $wgUser create this page?
+	 * @return boolean
+	 * @access public
+	 */
+	function userCanCreate() {
+		return $this->userCan('create');
+	}
+
+	/**
+	 * Can $wgUser move this page?
+	 * @return boolean
+	 * @access public
+	 */
+	function userCanMove() {
+		return $this->userCan('move');
+	}
+
+	/**
+	 * Would anybody with sufficient privileges be able to move this page?
+	 * Some pages just aren't movable.
+	 *
+	 * @return boolean
+	 * @access public
+	 */
+	function isMovable() {
+		return Namespace::isMovable( $this->getNamespace() )
+			&& $this->getInterwiki() == '';
+	}
+
+	/**
+	 * Can $wgUser read this page?
+	 * @return boolean
+	 * @access public
+	 */
+	function userCanRead() {
+		global $wgUser;
+
+		$result = null;
+		wfRunHooks( 'userCan', array( &$this, &$wgUser, 'read', &$result ) );
+		if ( $result !== null ) {
+			return $result;
+		}
+
+		if( $wgUser->isAllowed('read') ) {
+			return true;
+		} else {
+			global $wgWhitelistRead;
+
+			/** If anon users can create an account,
+			    they need to reach the login page first! */
+			if( $wgUser->isAllowed( 'createaccount' )
+			    && $this->getNamespace() == NS_SPECIAL
+			    && $this->getText() == 'Userlogin' ) {
+				return true;
+			}
+
+			/** some pages are explicitly allowed */
+			$name = $this->getPrefixedText();
+			if( $wgWhitelistRead && in_array( $name, $wgWhitelistRead ) ) {
+				return true;
+			}
+
+			# Compatibility with old settings
+			if( $wgWhitelistRead && $this->getNamespace() == NS_MAIN ) {
+				if( in_array( ':' . $name, $wgWhitelistRead ) ) {
+					return true;
+				}
+			}
+		}
+		return false;
+	}
+
+	/**
+	 * Is this a talk page of some sort?
+	 * @return bool
+	 * @access public
+	 */
+	function isTalkPage() {
+		return Namespace::isTalk( $this->getNamespace() );
+	}
+
+	/**
+	 * Is this a .css or .js subpage of a user page?
+	 * @return bool
+	 * @access public
+	 */
+	function isCssJsSubpage() {
+		return ( NS_USER == $this->mNamespace and preg_match("/\\.(css|js)$/", $this->mTextform ) );
+	}
+	/**
+	 * Is this a *valid* .css or .js subpage of a user page?
+	 * Check that the corresponding skin exists
+	 */
+	function isValidCssJsSubpage() {
+		if ( $this->isCssJsSubpage() ) {
+			$skinNames = Skin::getSkinNames();
+			return array_key_exists( $this->getSkinFromCssJsSubpage(), $skinNames );
+		} else {
+			return false;
+		}
+	}
+	/**
+	 * Trim down a .css or .js subpage title to get the corresponding skin name
+	 */
+	function getSkinFromCssJsSubpage() {
+		$subpage = explode( '/', $this->mTextform );
+		$subpage = $subpage[ count( $subpage ) - 1 ];
+		return( str_replace( array( '.css', '.js' ), array( '', '' ), $subpage ) );
+	}
+	/**
+	 * Is this a .css subpage of a user page?
+	 * @return bool
+	 * @access public
+	 */
+	function isCssSubpage() {
+		return ( NS_USER == $this->mNamespace and preg_match("/\\.css$/", $this->mTextform ) );
+	}
+	/**
+	 * Is this a .js subpage of a user page?
+	 * @return bool
+	 * @access public
+	 */
+	function isJsSubpage() {
+		return ( NS_USER == $this->mNamespace and preg_match("/\\.js$/", $this->mTextform ) );
+	}
+	/**
+	 * Protect css/js subpages of user pages: can $wgUser edit
+	 * this page?
+	 *
+	 * @return boolean
+	 * @todo XXX: this might be better using restrictions
+	 * @access public
+	 */
+	function userCanEditCssJsSubpage() {
+		global $wgUser;
+		return ( $wgUser->isAllowed('editinterface') or preg_match('/^'.preg_quote($wgUser->getName(), '/').'\//', $this->mTextform) );
+	}
+
+	/**
+	 * Loads a string into mRestrictions array
+	 * @param string $res restrictions in string format
+	 * @access public
+	 */
+	function loadRestrictions( $res ) {
+		foreach( explode( ':', trim( $res ) ) as $restrict ) {
+			$temp = explode( '=', trim( $restrict ) );
+			if(count($temp) == 1) {
+				// old format should be treated as edit/move restriction
+				$this->mRestrictions["edit"] = explode( ',', trim( $temp[0] ) );
+				$this->mRestrictions["move"] = explode( ',', trim( $temp[0] ) );
+			} else {
+				$this->mRestrictions[$temp[0]] = explode( ',', trim( $temp[1] ) );
+			}
+		}
+		$this->mRestrictionsLoaded = true;
+	}
+
+	/**
+	 * Accessor/initialisation for mRestrictions
+	 * @param string $action action that permission needs to be checked for
+	 * @return array the array of groups allowed to edit this article
+	 * @access public
+	 */
+	function getRestrictions($action) {
+		$id = $this->getArticleID();
+		if ( 0 == $id ) { return array(); }
+
+		if ( ! $this->mRestrictionsLoaded ) {
+			$dbr =& wfGetDB( DB_SLAVE );
+			$res = $dbr->selectField( 'page', 'page_restrictions', 'page_id='.$id );
+			$this->loadRestrictions( $res );
+		}
+		if( isset( $this->mRestrictions[$action] ) ) {
+			return $this->mRestrictions[$action];
+		}
+		return array();
+	}
+
+	/**
+	 * Is there a version of this page in the deletion archive?
+	 * @return int the number of archived revisions
+	 * @access public
+	 */
+	function isDeleted() {
+		$fname = 'Title::isDeleted';
+		if ( $this->getNamespace() < 0 ) {
+			$n = 0;
+		} else {
+			$dbr =& wfGetDB( DB_SLAVE );
+			$n = $dbr->selectField( 'archive', 'COUNT(*)', array( 'ar_namespace' => $this->getNamespace(),
+				'ar_title' => $this->getDBkey() ), $fname );
+			if( $this->getNamespace() == NS_IMAGE ) {
+				$n += $dbr->selectField( 'filearchive', 'COUNT(*)',
+					array( 'fa_name' => $this->getDBkey() ), $fname );
+			}
+		}
+		return (int)$n;
+	}
+
+	/**
+	 * Get the article ID for this Title from the link cache,
+	 * adding it if necessary
+	 * @param int $flags a bit field; may be GAID_FOR_UPDATE to select
+	 * 	for update
+	 * @return int the ID
+	 * @access public
+	 */
+	function getArticleID( $flags = 0 ) {
+		$linkCache =& LinkCache::singleton();
+		if ( $flags & GAID_FOR_UPDATE ) {
+			$oldUpdate = $linkCache->forUpdate( true );
+			$this->mArticleID = $linkCache->addLinkObj( $this );
+			$linkCache->forUpdate( $oldUpdate );
+		} else {
+			if ( -1 == $this->mArticleID ) {
+				$this->mArticleID = $linkCache->addLinkObj( $this );
+			}
+		}
+		return $this->mArticleID;
+	}
+
+	function getLatestRevID() {
+		if ($this->mLatestID !== false)
+			return $this->mLatestID;
+
+		$db =& wfGetDB(DB_SLAVE);
+		return $this->mLatestID = $db->selectField( 'revision',
+			"max(rev_id)",
+			array('rev_page' => $this->getArticleID()),
+			'Title::getLatestRevID' );
+	}
+
+	/**
+	 * This clears some fields in this object, and clears any associated
+	 * keys in the "bad links" section of the link cache.
+	 *
+	 * - This is called from Article::insertNewArticle() to allow
+	 * loading of the new page_id. It's also called from
+	 * Article::doDeleteArticle()
+	 *
+	 * @param int $newid the new Article ID
+	 * @access public
+	 */
+	function resetArticleID( $newid ) {
+		$linkCache =& LinkCache::singleton();
+		$linkCache->clearBadLink( $this->getPrefixedDBkey() );
+
+		if ( 0 == $newid ) { $this->mArticleID = -1; }
+		else { $this->mArticleID = $newid; }
+		$this->mRestrictionsLoaded = false;
+		$this->mRestrictions = array();
+	}
+
+	/**
+	 * Updates page_touched for this page; called from LinksUpdate.php
+	 * @return bool true if the update succeded
+	 * @access public
+	 */
+	function invalidateCache() {
+		global $wgUseFileCache;
+
+		if ( wfReadOnly() ) {
+			return;
+		}
+
+		$dbw =& wfGetDB( DB_MASTER );
+		$success = $dbw->update( 'page',
+			array( /* SET */
+				'page_touched' => $dbw->timestamp()
+			), array( /* WHERE */
+				'page_namespace' => $this->getNamespace() ,
+				'page_title' => $this->getDBkey()
+			), 'Title::invalidateCache'
+		);
+
+		if ($wgUseFileCache) {
+			$cache = new CacheManager($this);
+			@unlink($cache->fileCacheName());
+		}
+
+		return $success;
+	}
+
+	/**
+	 * Prefix some arbitrary text with the namespace or interwiki prefix
+	 * of this object
+	 *
+	 * @param string $name the text
+	 * @return string the prefixed text
+	 * @private
+	 */
+	/* private */ function prefix( $name ) {
+		global $wgContLang;
+
+		$p = '';
+		if ( '' != $this->mInterwiki ) {
+			$p = $this->mInterwiki . ':';
+		}
+		if ( 0 != $this->mNamespace ) {
+			$p .= $wgContLang->getNsText( $this->mNamespace ) . ':';
+		}
+		return $p . $name;
+	}
+
+	/**
+	 * Secure and split - main initialisation function for this object
+	 *
+	 * Assumes that mDbkeyform has been set, and is urldecoded
+	 * and uses underscores, but not otherwise munged.  This function
+	 * removes illegal characters, splits off the interwiki and
+	 * namespace prefixes, sets the other forms, and canonicalizes
+	 * everything.
+	 * @return bool true on success
+	 * @private
+	 */
+	/* private */ function secureAndSplit() {
+		global $wgContLang, $wgLocalInterwiki, $wgCapitalLinks;
+		$fname = 'Title::secureAndSplit';
+
+		# Initialisation
+		static $rxTc = false;
+		if( !$rxTc ) {
+			# % is needed as well
+			$rxTc = '/[^' . Title::legalChars() . ']|%[0-9A-Fa-f]{2}/S';
+		}
+
+		$this->mInterwiki = $this->mFragment = '';
+		$this->mNamespace = $this->mDefaultNamespace; # Usually NS_MAIN
+
+		# Clean up whitespace
+		#
+		$t = preg_replace( '/[ _]+/', '_', $this->mDbkeyform );
+		$t = trim( $t, '_' );
+
+		if ( '' == $t ) {
+			return false;
+		}
+
+		if( false !== strpos( $t, UTF8_REPLACEMENT ) ) {
+			# Contained illegal UTF-8 sequences or forbidden Unicode chars.
+			return false;
+		}
+
+		$this->mDbkeyform = $t;
+
+		# Initial colon indicates main namespace rather than specified default
+		# but should not create invalid {ns,title} pairs such as {0,Project:Foo}
+		if ( ':' == $t{0} ) {
+			$this->mNamespace = NS_MAIN;
+			$t = substr( $t, 1 ); # remove the colon but continue processing
+		}
+
+		# Namespace or interwiki prefix
+		$firstPass = true;
+		do {
+			if ( preg_match( "/^(.+?)_*:_*(.*)$/S", $t, $m ) ) {
+				$p = $m[1];
+				$lowerNs = strtolower( $p );
+				if ( $ns = Namespace::getCanonicalIndex( $lowerNs ) ) {
+					# Canonical namespace
+					$t = $m[2];
+					$this->mNamespace = $ns;
+				} elseif ( $ns = $wgContLang->getNsIndex( $lowerNs )) {
+					# Ordinary namespace
+					$t = $m[2];
+					$this->mNamespace = $ns;
+				} elseif( $this->getInterwikiLink( $p ) ) {
+					if( !$firstPass ) {
+						# Can't make a local interwiki link to an interwiki link.
+						# That's just crazy!
+						return false;
+					}
+
+					# Interwiki link
+					$t = $m[2];
+					$this->mInterwiki = strtolower( $p );
+
+					# Redundant interwiki prefix to the local wiki
+					if ( 0 == strcasecmp( $this->mInterwiki, $wgLocalInterwiki ) ) {
+						if( $t == '' ) {
+							# Can't have an empty self-link
+							return false;
+						}
+						$this->mInterwiki = '';
+						$firstPass = false;
+						# Do another namespace split...
+						continue;
+					}
+
+					# If there's an initial colon after the interwiki, that also
+					# resets the default namespace
+					if ( $t !== '' && $t[0] == ':' ) {
+						$this->mNamespace = NS_MAIN;
+						$t = substr( $t, 1 );
+					}
+				}
+				# If there's no recognized interwiki or namespace,
+				# then let the colon expression be part of the title.
+			}
+			break;
+		} while( true );
+		$r = $t;
+
+		# We already know that some pages won't be in the database!
+		#
+		if ( '' != $this->mInterwiki || -1 == $this->mNamespace ) {
+			$this->mArticleID = 0;
+		}
+		$f = strstr( $r, '#' );
+		if ( false !== $f ) {
+			$this->mFragment = substr( $f, 1 );
+			$r = substr( $r, 0, strlen( $r ) - strlen( $f ) );
+			# remove whitespace again: prevents "Foo_bar_#"
+			# becoming "Foo_bar_"
+			$r = preg_replace( '/_*$/', '', $r );
+		}
+
+		# Reject illegal characters.
+		#
+		if( preg_match( $rxTc, $r ) ) {
+			return false;
+		}
+
+		/**
+		 * Pages with "/./" or "/../" appearing in the URLs will
+		 * often be unreachable due to the way web browsers deal
+		 * with 'relative' URLs. Forbid them explicitly.
+		 */
+		if ( strpos( $r, '.' ) !== false &&
+		     ( $r === '.' || $r === '..' ||
+		       strpos( $r, './' ) === 0  ||
+		       strpos( $r, '../' ) === 0 ||
+		       strpos( $r, '/./' ) !== false ||
+		       strpos( $r, '/../' ) !== false ) )
+		{
+			return false;
+		}
+
+		# We shouldn't need to query the DB for the size.
+		#$maxSize = $dbr->textFieldSize( 'page', 'page_title' );
+		if ( strlen( $r ) > 255 ) {
+			return false;
+		}
+
+		/**
+		 * Normally, all wiki links are forced to have
+		 * an initial capital letter so [[foo]] and [[Foo]]
+		 * point to the same place.
+		 *
+		 * Don't force it for interwikis, since the other
+		 * site might be case-sensitive.
+		 */
+		if( $wgCapitalLinks && $this->mInterwiki == '') {
+			$t = $wgContLang->ucfirst( $r );
+		} else {
+			$t = $r;
+		}
+
+		/**
+		 * Can't make a link to a namespace alone...
+		 * "empty" local links can only be self-links
+		 * with a fragment identifier.
+		 */
+		if( $t == '' &&
+			$this->mInterwiki == '' &&
+			$this->mNamespace != NS_MAIN ) {
+			return false;
+		}
+
+		// Any remaining initial :s are illegal.
+		if ( $t !== '' && ':' == $t{0} ) {
+			return false;
+		}
+		
+		# Fill fields
+		$this->mDbkeyform = $t;
+		$this->mUrlform = wfUrlencode( $t );
+
+		$this->mTextform = str_replace( '_', ' ', $t );
+
+		return true;
+	}
+
+	/**
+	 * Get a Title object associated with the talk page of this article
+	 * @return Title the object for the talk page
+	 * @access public
+	 */
+	function getTalkPage() {
+		return Title::makeTitle( Namespace::getTalk( $this->getNamespace() ), $this->getDBkey() );
+	}
+
+	/**
+	 * Get a title object associated with the subject page of this
+	 * talk page
+	 *
+	 * @return Title the object for the subject page
+	 * @access public
+	 */
+	function getSubjectPage() {
+		return Title::makeTitle( Namespace::getSubject( $this->getNamespace() ), $this->getDBkey() );
+	}
+
+	/**
+	 * Get an array of Title objects linking to this Title
+	 * Also stores the IDs in the link cache.
+	 *
+	 * WARNING: do not use this function on arbitrary user-supplied titles!
+	 * On heavily-used templates it will max out the memory.
+	 *
+	 * @param string $options may be FOR UPDATE
+	 * @return array the Title objects linking here
+	 * @access public
+	 */
+	function getLinksTo( $options = '', $table = 'pagelinks', $prefix = 'pl' ) {
+		$linkCache =& LinkCache::singleton();
+		$id = $this->getArticleID();
+
+		if ( $options ) {
+			$db =& wfGetDB( DB_MASTER );
+		} else {
+			$db =& wfGetDB( DB_SLAVE );
+		}
+
+		$res = $db->select( array( 'page', $table ),
+			array( 'page_namespace', 'page_title', 'page_id' ),
+			array(
+				"{$prefix}_from=page_id",
+				"{$prefix}_namespace" => $this->getNamespace(),
+				"{$prefix}_title"     => $this->getDbKey() ),
+			'Title::getLinksTo',
+			$options );
+
+		$retVal = array();
+		if ( $db->numRows( $res ) ) {
+			while ( $row = $db->fetchObject( $res ) ) {
+				if ( $titleObj = Title::makeTitle( $row->page_namespace, $row->page_title ) ) {
+					$linkCache->addGoodLinkObj( $row->page_id, $titleObj );
+					$retVal[] = $titleObj;
+				}
+			}
+		}
+		$db->freeResult( $res );
+		return $retVal;
+	}
+
+	/**
+	 * Get an array of Title objects using this Title as a template
+	 * Also stores the IDs in the link cache.
+	 *
+	 * WARNING: do not use this function on arbitrary user-supplied titles!
+	 * On heavily-used templates it will max out the memory.
+	 *
+	 * @param string $options may be FOR UPDATE
+	 * @return array the Title objects linking here
+	 * @access public
+	 */
+	function getTemplateLinksTo( $options = '' ) {
+		return $this->getLinksTo( $options, 'templatelinks', 'tl' );
+	}
+
+	/**
+	 * Get an array of Title objects referring to non-existent articles linked from this page
+	 *
+	 * @param string $options may be FOR UPDATE
+	 * @return array the Title objects
+	 * @access public
+	 */
+	function getBrokenLinksFrom( $options = '' ) {
+		if ( $options ) {
+			$db =& wfGetDB( DB_MASTER );
+		} else {
+			$db =& wfGetDB( DB_SLAVE );
+		}
+
+		$res = $db->safeQuery(
+			  "SELECT pl_namespace, pl_title
+			     FROM !
+			LEFT JOIN !
+			       ON pl_namespace=page_namespace
+			      AND pl_title=page_title
+			    WHERE pl_from=?
+			      AND page_namespace IS NULL
+				  !",
+			$db->tableName( 'pagelinks' ),
+			$db->tableName( 'page' ),
+			$this->getArticleId(),
+			$options );
+
+		$retVal = array();
+		if ( $db->numRows( $res ) ) {
+			while ( $row = $db->fetchObject( $res ) ) {
+				$retVal[] = Title::makeTitle( $row->pl_namespace, $row->pl_title );
+			}
+		}
+		$db->freeResult( $res );
+		return $retVal;
+	}
+
+
+	/**
+	 * Get a list of URLs to purge from the Squid cache when this
+	 * page changes
+	 *
+	 * @return array the URLs
+	 * @access public
+	 */
+	function getSquidURLs() {
+		return array(
+			$this->getInternalURL(),
+			$this->getInternalURL( 'action=history' )
+		);
+	}
+
+	function purgeSquid() {
+		global $wgUseSquid;
+		if ( $wgUseSquid ) {
+			$urls = $this->getSquidURLs();
+			$u = new SquidUpdate( $urls );
+			$u->doUpdate();
+		}
+	}
+
+	/**
+	 * Move this page without authentication
+	 * @param Title &$nt the new page Title
+	 * @access public
+	 */
+	function moveNoAuth( &$nt ) {
+		return $this->moveTo( $nt, false );
+	}
+
+	/**
+	 * Check whether a given move operation would be valid.
+	 * Returns true if ok, or a message key string for an error message
+	 * if invalid. (Scarrrrry ugly interface this.)
+	 * @param Title &$nt the new title
+	 * @param bool $auth indicates whether $wgUser's permissions
+	 * 	should be checked
+	 * @return mixed true on success, message name on failure
+	 * @access public
+	 */
+	function isValidMoveOperation( &$nt, $auth = true ) {
+		if( !$this or !$nt ) {
+			return 'badtitletext';
+		}
+		if( $this->equals( $nt ) ) {
+			return 'selfmove';
+		}
+		if( !$this->isMovable() || !$nt->isMovable() ) {
+			return 'immobile_namespace';
+		}
+
+		$oldid = $this->getArticleID();
+		$newid = $nt->getArticleID();
+
+		if ( strlen( $nt->getDBkey() ) < 1 ) {
+			return 'articleexists';
+		}
+		if ( ( '' == $this->getDBkey() ) ||
+			 ( !$oldid ) ||
+		     ( '' == $nt->getDBkey() ) ) {
+			return 'badarticleerror';
+		}
+
+		if ( $auth && (
+				!$this->userCanEdit() || !$nt->userCanEdit() ||
+				!$this->userCanMove() || !$nt->userCanMove() ) ) {
+			return 'protectedpage';
+		}
+
+		# The move is allowed only if (1) the target doesn't exist, or
+		# (2) the target is a redirect to the source, and has no history
+		# (so we can undo bad moves right after they're done).
+
+		if ( 0 != $newid ) { # Target exists; check for validity
+			if ( ! $this->isValidMoveTarget( $nt ) ) {
+				return 'articleexists';
+			}
+		}
+		return true;
+	}
+
+	/**
+	 * Move a title to a new location
+	 * @param Title &$nt the new title
+	 * @param bool $auth indicates whether $wgUser's permissions
+	 * 	should be checked
+	 * @return mixed true on success, message name on failure
+	 * @access public
+	 */
+	function moveTo( &$nt, $auth = true, $reason = '' ) {
+		$err = $this->isValidMoveOperation( $nt, $auth );
+		if( is_string( $err ) ) {
+			return $err;
+		}
+
+		$pageid = $this->getArticleID();
+		if( $nt->exists() ) {
+			$this->moveOverExistingRedirect( $nt, $reason );
+			$pageCountChange = 0;
+		} else { # Target didn't exist, do normal move.
+			$this->moveToNewTitle( $nt, $reason );
+			$pageCountChange = 1;
+		}
+		$redirid = $this->getArticleID();
+
+		# Fixing category links (those without piped 'alternate' names) to be sorted under the new title
+		$dbw =& wfGetDB( DB_MASTER );
+		$categorylinks = $dbw->tableName( 'categorylinks' );
+		$sql = "UPDATE $categorylinks SET cl_sortkey=" . $dbw->addQuotes( $nt->getPrefixedText() ) .
+			" WHERE cl_from=" . $dbw->addQuotes( $pageid ) .
+			" AND cl_sortkey=" . $dbw->addQuotes( $this->getPrefixedText() );
+		$dbw->query( $sql, 'SpecialMovepage::doSubmit' );
+
+		# Update watchlists
+
+		$oldnamespace = $this->getNamespace() & ~1;
+		$newnamespace = $nt->getNamespace() & ~1;
+		$oldtitle = $this->getDBkey();
+		$newtitle = $nt->getDBkey();
+
+		if( $oldnamespace != $newnamespace || $oldtitle != $newtitle ) {
+			WatchedItem::duplicateEntries( $this, $nt );
+		}
+
+		# Update search engine
+		$u = new SearchUpdate( $pageid, $nt->getPrefixedDBkey() );
+		$u->doUpdate();
+		$u = new SearchUpdate( $redirid, $this->getPrefixedDBkey(), '' );
+		$u->doUpdate();
+
+		# Update site_stats
+		if ( $this->getNamespace() == NS_MAIN and $nt->getNamespace() != NS_MAIN ) {
+			# Moved out of main namespace
+			# not viewed, edited, removing
+			$u = new SiteStatsUpdate( 0, 1, -1, $pageCountChange);
+		} elseif ( $this->getNamespace() != NS_MAIN and $nt->getNamespace() == NS_MAIN ) {
+			# Moved into main namespace
+			# not viewed, edited, adding
+			$u = new SiteStatsUpdate( 0, 1, +1, $pageCountChange );
+		} elseif ( $pageCountChange ) {
+			# Added redirect
+			$u = new SiteStatsUpdate( 0, 0, 0, 1 );
+		} else{
+			$u = false;
+		}
+		if ( $u ) {
+			$u->doUpdate();
+		}
+
+		global $wgUser;
+		wfRunHooks( 'TitleMoveComplete', array( &$this, &$nt, &$wgUser, $pageid, $redirid ) );
+		return true;
+	}
+
+	/**
+	 * Move page to a title which is at present a redirect to the
+	 * source page
+	 *
+	 * @param Title &$nt the page to move to, which should currently
+	 * 	be a redirect
+	 * @private
+	 */
+	function moveOverExistingRedirect( &$nt, $reason = '' ) {
+		global $wgUseSquid;
+		$fname = 'Title::moveOverExistingRedirect';
+		$comment = wfMsgForContent( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() );
+
+		if ( $reason ) {
+			$comment .= ": $reason";
+		}
+
+		$now = wfTimestampNow();
+		$rand = wfRandom();
+		$newid = $nt->getArticleID();
+		$oldid = $this->getArticleID();
+		$dbw =& wfGetDB( DB_MASTER );
+		$linkCache =& LinkCache::singleton();
+
+		# Delete the old redirect. We don't save it to history since
+		# by definition if we've got here it's rather uninteresting.
+		# We have to remove it so that the next step doesn't trigger
+		# a conflict on the unique namespace+title index...
+		$dbw->delete( 'page', array( 'page_id' => $newid ), $fname );
+
+		# Save a null revision in the page's history notifying of the move
+		$nullRevision = Revision::newNullRevision( $dbw, $oldid, $comment, true );
+		$nullRevId = $nullRevision->insertOn( $dbw );
+
+		# Change the name of the target page:
+		$dbw->update( 'page',
+			/* SET */ array(
+				'page_touched'   => $dbw->timestamp($now),
+				'page_namespace' => $nt->getNamespace(),
+				'page_title'     => $nt->getDBkey(),
+				'page_latest'    => $nullRevId,
+			),
+			/* WHERE */ array( 'page_id' => $oldid ),
+			$fname
+		);
+		$linkCache->clearLink( $nt->getPrefixedDBkey() );
+
+		# Recreate the redirect, this time in the other direction.
+		$mwRedir = MagicWord::get( MAG_REDIRECT );
+		$redirectText = $mwRedir->getSynonym( 0 ) . ' [[' . $nt->getPrefixedText() . "]]\n";
+		$redirectArticle = new Article( $this );
+		$newid = $redirectArticle->insertOn( $dbw );
+		$redirectRevision = new Revision( array(
+			'page'    => $newid,
+			'comment' => $comment,
+			'text'    => $redirectText ) );
+		$revid = $redirectRevision->insertOn( $dbw );
+		$redirectArticle->updateRevisionOn( $dbw, $redirectRevision, 0 );
+		$linkCache->clearLink( $this->getPrefixedDBkey() );
+
+		# Log the move
+		$log = new LogPage( 'move' );
+		$log->addEntry( 'move_redir', $this, $reason, array( 1 => $nt->getPrefixedText() ) );
+
+		# Now, we record the link from the redirect to the new title.
+		# It should have no other outgoing links...
+		$dbw->delete( 'pagelinks', array( 'pl_from' => $newid ), $fname );
+		$dbw->insert( 'pagelinks',
+			array(
+				'pl_from'      => $newid,
+				'pl_namespace' => $nt->getNamespace(),
+				'pl_title'     => $nt->getDbKey() ),
+			$fname );
+
+		# Purge squid
+		if ( $wgUseSquid ) {
+			$urls = array_merge( $nt->getSquidURLs(), $this->getSquidURLs() );
+			$u = new SquidUpdate( $urls );
+			$u->doUpdate();
+		}
+	}
+
+	/**
+	 * Move page to non-existing title.
+	 * @param Title &$nt the new Title
+	 * @private
+	 */
+	function moveToNewTitle( &$nt, $reason = '' ) {
+		global $wgUseSquid;
+		$fname = 'MovePageForm::moveToNewTitle';
+		$comment = wfMsgForContent( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() );
+		if ( $reason ) {
+			$comment .= ": $reason";
+		}
+
+		$newid = $nt->getArticleID();
+		$oldid = $this->getArticleID();
+		$dbw =& wfGetDB( DB_MASTER );
+		$now = $dbw->timestamp();
+		$rand = wfRandom();
+		$linkCache =& LinkCache::singleton();
+
+		# Save a null revision in the page's history notifying of the move
+		$nullRevision = Revision::newNullRevision( $dbw, $oldid, $comment, true );
+		$nullRevId = $nullRevision->insertOn( $dbw );
+
+		# Rename cur entry
+		$dbw->update( 'page',
+			/* SET */ array(
+				'page_touched'   => $now,
+				'page_namespace' => $nt->getNamespace(),
+				'page_title'     => $nt->getDBkey(),
+				'page_latest'    => $nullRevId,
+			),
+			/* WHERE */ array( 'page_id' => $oldid ),
+			$fname
+		);
+
+		$linkCache->clearLink( $nt->getPrefixedDBkey() );
+
+		# Insert redirect
+		$mwRedir = MagicWord::get( MAG_REDIRECT );
+		$redirectText = $mwRedir->getSynonym( 0 ) . ' [[' . $nt->getPrefixedText() . "]]\n";
+		$redirectArticle = new Article( $this );
+		$newid = $redirectArticle->insertOn( $dbw );
+		$redirectRevision = new Revision( array(
+			'page'    => $newid,
+			'comment' => $comment,
+			'text'    => $redirectText ) );
+		$revid = $redirectRevision->insertOn( $dbw );
+		$redirectArticle->updateRevisionOn( $dbw, $redirectRevision, 0 );
+		$linkCache->clearLink( $this->getPrefixedDBkey() );
+
+		# Log the move
+		$log = new LogPage( 'move' );
+		$log->addEntry( 'move', $this, $reason, array( 1 => $nt->getPrefixedText()) );
+
+		# Purge caches as per article creation
+		Article::onArticleCreate( $nt );
+
+		# Record the just-created redirect's linking to the page
+		$dbw->insert( 'pagelinks',
+			array(
+				'pl_from'      => $newid,
+				'pl_namespace' => $nt->getNamespace(),
+				'pl_title'     => $nt->getDBkey() ),
+			$fname );
+
+		# Purge old title from squid
+		# The new title, and links to the new title, are purged in Article::onArticleCreate()
+		$this->purgeSquid();
+	}
+
+	/**
+	 * Checks if $this can be moved to a given Title
+	 * - Selects for update, so don't call it unless you mean business
+	 *
+	 * @param Title &$nt the new title to check
+	 * @access public
+	 */
+	function isValidMoveTarget( $nt ) {
+
+		$fname = 'Title::isValidMoveTarget';
+		$dbw =& wfGetDB( DB_MASTER );
+
+		# Is it a redirect?
+		$id  = $nt->getArticleID();
+		$obj = $dbw->selectRow( array( 'page', 'revision', 'text'),
+			array( 'page_is_redirect','old_text','old_flags' ),
+			array( 'page_id' => $id, 'page_latest=rev_id', 'rev_text_id=old_id' ),
+			$fname, 'FOR UPDATE' );
+
+		if ( !$obj || 0 == $obj->page_is_redirect ) {
+			# Not a redirect
+			wfDebug( __METHOD__ . ": not a redirect\n" );
+			return false;
+		}
+		$text = Revision::getRevisionText( $obj );
+
+		# Does the redirect point to the source?
+		# Or is it a broken self-redirect, usually caused by namespace collisions?
+		if ( preg_match( "/\\[\\[\\s*([^\\]\\|]*)]]/", $text, $m ) ) {
+			$redirTitle = Title::newFromText( $m[1] );
+			if( !is_object( $redirTitle ) ||
+				( $redirTitle->getPrefixedDBkey() != $this->getPrefixedDBkey() &&
+				$redirTitle->getPrefixedDBkey() != $nt->getPrefixedDBkey() ) ) {
+				wfDebug( __METHOD__ . ": redirect points to other page\n" );
+				return false;
+			}
+		} else {
+			# Fail safe
+			wfDebug( __METHOD__ . ": failsafe\n" );
+			return false;
+		}
+
+		# Does the article have a history?
+		$row = $dbw->selectRow( array( 'page', 'revision'),
+			array( 'rev_id' ),
+			array( 'page_namespace' => $nt->getNamespace(),
+				'page_title' => $nt->getDBkey(),
+				'page_id=rev_page AND page_latest != rev_id'
+			), $fname, 'FOR UPDATE'
+		);
+
+		# Return true if there was no history
+		return $row === false;
+	}
+
+	/**
+	 * Create a redirect; fails if the title already exists; does
+	 * not notify RC
+	 *
+	 * @param Title $dest the destination of the redirect
+	 * @param string $comment the comment string describing the move
+	 * @return bool true on success
+	 * @access public
+	 */
+	function createRedirect( $dest, $comment ) {
+		if ( $this->getArticleID() ) {
+			return false;
+		}
+
+		$fname = 'Title::createRedirect';
+		$dbw =& wfGetDB( DB_MASTER );
+
+		$article = new Article( $this );
+		$newid = $article->insertOn( $dbw );
+		$revision = new Revision( array(
+			'page'      => $newid,
+			'comment'   => $comment,
+			'text'      => "#REDIRECT [[" . $dest->getPrefixedText() . "]]\n",
+			) );
+		$revisionId = $revision->insertOn( $dbw );
+		$article->updateRevisionOn( $dbw, $revision, 0 );
+
+		# Link table
+		$dbw->insert( 'pagelinks',
+			array(
+				'pl_from'      => $newid,
+				'pl_namespace' => $dest->getNamespace(),
+				'pl_title'     => $dest->getDbKey()
+			), $fname
+		);
+
+		Article::onArticleCreate( $this );
+		return true;
+	}
+
+	/**
+	 * Get categories to which this Title belongs and return an array of
+	 * categories' names.
+	 *
+	 * @return array an array of parents in the form:
+	 *	$parent => $currentarticle
+	 * @access public
+	 */
+	function getParentCategories() {
+		global $wgContLang;
+
+		$titlekey = $this->getArticleId();
+		$dbr =& wfGetDB( DB_SLAVE );
+		$categorylinks = $dbr->tableName( 'categorylinks' );
+
+		# NEW SQL
+		$sql = "SELECT * FROM $categorylinks"
+		     ." WHERE cl_from='$titlekey'"
+			 ." AND cl_from <> '0'"
+			 ." ORDER BY cl_sortkey";
+
+		$res = $dbr->query ( $sql ) ;
+
+		if($dbr->numRows($res) > 0) {
+			while ( $x = $dbr->fetchObject ( $res ) )
+				//$data[] = Title::newFromText($wgContLang->getNSText ( NS_CATEGORY ).':'.$x->cl_to);
+				$data[$wgContLang->getNSText ( NS_CATEGORY ).':'.$x->cl_to] = $this->getFullText();
+			$dbr->freeResult ( $res ) ;
+		} else {
+			$data = '';
+		}
+		return $data;
+	}
+
+	/**
+	 * Get a tree of parent categories
+	 * @param array $children an array with the children in the keys, to check for circular refs
+	 * @return array
+	 * @access public
+	 */
+	function getParentCategoryTree( $children = array() ) {
+		$parents = $this->getParentCategories();
+
+		if($parents != '') {
+			foreach($parents as $parent => $current) {
+				if ( array_key_exists( $parent, $children ) ) {
+					# Circular reference
+					$stack[$parent] = array();
+				} else {
+					$nt = Title::newFromText($parent);
+					$stack[$parent] = $nt->getParentCategoryTree( $children + array($parent => 1) );
+				}
+			}
+			return $stack;
+		} else {
+			return array();
+		}
+	}
+
+
+	/**
+	 * Get an associative array for selecting this title from
+	 * the "page" table
+	 *
+	 * @return array
+	 * @access public
+	 */
+	function pageCond() {
+		return array( 'page_namespace' => $this->mNamespace, 'page_title' => $this->mDbkeyform );
+	}
+
+	/**
+	 * Get the revision ID of the previous revision
+	 *
+	 * @param integer $revision  Revision ID. Get the revision that was before this one.
+	 * @return interger $oldrevision|false
+	 */
+	function getPreviousRevisionID( $revision ) {
+		$dbr =& wfGetDB( DB_SLAVE );
+		return $dbr->selectField( 'revision', 'rev_id',
+			'rev_page=' . intval( $this->getArticleId() ) .
+			' AND rev_id<' . intval( $revision ) . ' ORDER BY rev_id DESC' );
+	}
+
+	/**
+	 * Get the revision ID of the next revision
+	 *
+	 * @param integer $revision  Revision ID. Get the revision that was after this one.
+	 * @return interger $oldrevision|false
+	 */
+	function getNextRevisionID( $revision ) {
+		$dbr =& wfGetDB( DB_SLAVE );
+		return $dbr->selectField( 'revision', 'rev_id',
+			'rev_page=' . intval( $this->getArticleId() ) .
+			' AND rev_id>' . intval( $revision ) . ' ORDER BY rev_id' );
+	}
+
+	/**
+	 * Compare with another title.
+	 *
+	 * @param Title $title
+	 * @return bool
+	 */
+	function equals( $title ) {
+		// Note: === is necessary for proper matching of number-like titles.
+		return $this->getInterwiki() === $title->getInterwiki()
+			&& $this->getNamespace() == $title->getNamespace()
+			&& $this->getDbkey() === $title->getDbkey();
+	}
+
+	/**
+	 * Check if page exists
+	 * @return bool
+	 */
+	function exists() {
+		return $this->getArticleId() != 0;
+	}
+
+	/**
+	 * Should a link should be displayed as a known link, just based on its title?
+	 *
+	 * Currently, a self-link with a fragment and special pages are in
+	 * this category. Special pages never exist in the database.
+	 */
+	function isAlwaysKnown() {
+		return  $this->isExternal() || ( 0 == $this->mNamespace && "" == $this->mDbkeyform )
+		  || NS_SPECIAL == $this->mNamespace;
+	}
+
+	/**
+	 * Update page_touched timestamps and send squid purge messages for
+	 * pages linking to this title.	May be sent to the job queue depending 
+	 * on the number of links. Typically called on create and delete.
+	 */
+	function touchLinks() {
+		$u = new HTMLCacheUpdate( $this, 'pagelinks' );
+		$u->doUpdate();
+
+		if ( $this->getNamespace() == NS_CATEGORY ) {
+			$u = new HTMLCacheUpdate( $this, 'categorylinks' );
+			$u->doUpdate();
+		}
+	}
+
+	function trackbackURL() {
+		global $wgTitle, $wgScriptPath, $wgServer;
+
+		return "$wgServer$wgScriptPath/trackback.php?article="
+			. htmlspecialchars(urlencode($wgTitle->getPrefixedDBkey()));
+	}
+
+	function trackbackRDF() {
+		$url = htmlspecialchars($this->getFullURL());
+		$title = htmlspecialchars($this->getText());
+		$tburl = $this->trackbackURL();
+
+		return "
+<rdf:RDF xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\"
+         xmlns:dc=\"http://purl.org/dc/elements/1.1/\"
+         xmlns:trackback=\"http://madskills.com/public/xml/rss/module/trackback/\">
+<rdf:Description
+   rdf:about=\"$url\"
+   dc:identifier=\"$url\"
+   dc:title=\"$title\"
+   trackback:ping=\"$tburl\" />
+</rdf:RDF>";
+	}
+
+	/**
+	 * Generate strings used for xml 'id' names in monobook tabs
+	 * @return string
+	 */
+	function getNamespaceKey() {
+		switch ($this->getNamespace()) {
+			case NS_MAIN:
+			case NS_TALK:
+				return 'nstab-main';
+			case NS_USER:
+			case NS_USER_TALK:
+				return 'nstab-user';
+			case NS_MEDIA:
+				return 'nstab-media';
+			case NS_SPECIAL:
+				return 'nstab-special';
+			case NS_PROJECT:
+			case NS_PROJECT_TALK:
+				return 'nstab-project';
+			case NS_IMAGE:
+			case NS_IMAGE_TALK:
+				return 'nstab-image';
+			case NS_MEDIAWIKI:
+			case NS_MEDIAWIKI_TALK:
+				return 'nstab-mediawiki';
+			case NS_TEMPLATE:
+			case NS_TEMPLATE_TALK:
+				return 'nstab-template';
+			case NS_HELP:
+			case NS_HELP_TALK:
+				return 'nstab-help';
+			case NS_CATEGORY:
+			case NS_CATEGORY_TALK:
+				return 'nstab-category';
+			default:
+				return 'nstab-' . strtolower( $this->getSubjectNsText() );
+		}
+	}
+}
+?>