includes/parser/CoreParserFunctions.php

   1 <?php
   2 /**
   3  * Parser functions provided by MediaWiki core
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Parser
  22  */
  23
  24 /**
  25  * Various core parser functions, registered in Parser::firstCallInit()
  26  * @ingroup Parser
  27  */
  28 class CoreParserFunctions {
  29         /**
  30          * @param Parser $parser
  31          * @return void
  32          */
  33         public static function register( $parser ) {
  34                 global $wgAllowDisplayTitle, $wgAllowSlowParserFunctions;
  35
  36                 # Syntax for arguments (see Parser::setFunctionHook):
  37                 #  "name for lookup in localized magic words array",
  38                 #  function callback,
  39                 #  optional SFH_NO_HASH to omit the hash from calls (e.g. {{int:...}}
  40                 #    instead of {{#int:...}})
  41                 $noHashFunctions = array(
  42                         'ns', 'nse', 'urlencode', 'lcfirst', 'ucfirst', 'lc', 'uc',
  43                         'localurl', 'localurle', 'fullurl', 'fullurle', 'canonicalurl',
  44                         'canonicalurle', 'formatnum', 'grammar', 'gender', 'plural',
  45                         'numberofpages', 'numberofusers', 'numberofactiveusers',
  46                         'numberofarticles', 'numberoffiles', 'numberofadmins',
  47                         'numberingroup', 'numberofedits', 'language',
  48                         'padleft', 'padright', 'anchorencode', 'defaultsort', 'filepath',
  49                         'pagesincategory', 'pagesize', 'protectionlevel',
  50                         'namespacee', 'namespacenumber', 'talkspace', 'talkspacee',
  51                         'subjectspace', 'subjectspacee', 'pagename', 'pagenamee',
  52                         'fullpagename', 'fullpagenamee', 'rootpagename', 'rootpagenamee',
  53                         'basepagename', 'basepagenamee', 'subpagename', 'subpagenamee',
  54                         'talkpagename', 'talkpagenamee', 'subjectpagename',
  55                         'subjectpagenamee', 'pageid', 'revisionid', 'revisionday',
  56                         'revisionday2', 'revisionmonth', 'revisionmonth1', 'revisionyear',
  57                         'revisiontimestamp', 'revisionuser', 'cascadingsources',
  58                 );
  59                 foreach ( $noHashFunctions as $func ) {
  60                         $parser->setFunctionHook( $func, array( __CLASS__, $func ), SFH_NO_HASH );
  61                 }
  62
  63                 $parser->setFunctionHook( 'namespace', array( __CLASS__, 'mwnamespace' ), SFH_NO_HASH );
  64                 $parser->setFunctionHook( 'int', array( __CLASS__, 'intFunction' ), SFH_NO_HASH );
  65                 $parser->setFunctionHook( 'special', array( __CLASS__, 'special' ) );
  66                 $parser->setFunctionHook( 'speciale', array( __CLASS__, 'speciale' ) );
  67                 $parser->setFunctionHook( 'tag', array( __CLASS__, 'tagObj' ), SFH_OBJECT_ARGS );
  68                 $parser->setFunctionHook( 'formatdate', array( __CLASS__, 'formatDate' ) );
  69
  70                 if ( $wgAllowDisplayTitle ) {
  71                         $parser->setFunctionHook( 'displaytitle', array( __CLASS__, 'displaytitle' ), SFH_NO_HASH );
  72                 }
  73                 if ( $wgAllowSlowParserFunctions ) {
  74                         $parser->setFunctionHook(
  75                                 'pagesinnamespace',
  76                                 array( __CLASS__, 'pagesinnamespace' ),
  77                                 SFH_NO_HASH
  78                         );
  79                 }
  80         }
  81
  82         /**
  83          * @param Parser $parser
  84          * @param string $part1
  85          * @return array
  86          */
  87         public static function intFunction( $parser, $part1 = '' /*, ... */ ) {
  88                 if ( strval( $part1 ) !== '' ) {
  89                         $args = array_slice( func_get_args(), 2 );
  90                         $message = wfMessage( $part1, $args )
  91                                 ->inLanguage( $parser->getOptions()->getUserLangObj() )->plain();
  92
  93                         return array( $message, 'noparse' => false );
  94                 } else {
  95                         return array( 'found' => false );
  96                 }
  97         }
  98
  99         /**
 100          * @param Parser $parser
 101          * @param string $date
 102          * @param string $defaultPref
 103          *
 104          * @return string
 105          */
 106         public static function formatDate( $parser, $date, $defaultPref = null ) {
 107                 $lang = $parser->getFunctionLang();
 108                 $df = DateFormatter::getInstance( $lang );
 109
 110                 $date = trim( $date );
 111
 112                 $pref = $parser->getOptions()->getDateFormat();
 113
 114                 // Specify a different default date format other than the the normal default
 115                 // if the user has 'default' for their setting
 116                 if ( $pref == 'default' && $defaultPref ) {
 117                         $pref = $defaultPref;
 118                 }
 119
 120                 $date = $df->reformat( $pref, $date, array( 'match-whole' ) );
 121                 return $date;
 122         }
 123
 124         public static function ns( $parser, $part1 = '' ) {
 125                 global $wgContLang;
 126                 if ( intval( $part1 ) || $part1 == "0" ) {
 127                         $index = intval( $part1 );
 128                 } else {
 129                         $index = $wgContLang->getNsIndex( str_replace( ' ', '_', $part1 ) );
 130                 }
 131                 if ( $index !== false ) {
 132                         return $wgContLang->getFormattedNsText( $index );
 133                 } else {
 134                         return array( 'found' => false );
 135                 }
 136         }
 137
 138         public static function nse( $parser, $part1 = '' ) {
 139                 $ret = self::ns( $parser, $part1 );
 140                 if ( is_string( $ret ) ) {
 141                         $ret = wfUrlencode( str_replace( ' ', '_', $ret ) );
 142                 }
 143                 return $ret;
 144         }
 145
 146         /**
 147          * urlencodes a string according to one of three patterns: (bug 22474)
 148          *
 149          * By default (for HTTP "query" strings), spaces are encoded as '+'.
 150          * Or to encode a value for the HTTP "path", spaces are encoded as '%20'.
 151          * For links to "wiki"s, or similar software, spaces are encoded as '_',
 152          *
 153          * @param Parser $parser
 154          * @param string $s The text to encode.
 155          * @param string $arg (optional): The type of encoding.
 156          * @return string
 157          */
 158         public static function urlencode( $parser, $s = '', $arg = null ) {
 159                 static $magicWords = null;
 160                 if ( is_null( $magicWords ) ) {
 161                         $magicWords = new MagicWordArray( array( 'url_path', 'url_query', 'url_wiki' ) );
 162                 }
 163                 switch ( $magicWords->matchStartToEnd( $arg ) ) {
 164
 165                         // Encode as though it's a wiki page, '_' for ' '.
 166                         case 'url_wiki':
 167                                 $func = 'wfUrlencode';
 168                                 $s = str_replace( ' ', '_', $s );
 169                                 break;
 170
 171                         // Encode for an HTTP Path, '%20' for ' '.
 172                         case 'url_path':
 173                                 $func = 'rawurlencode';
 174                                 break;
 175
 176                         // Encode for HTTP query, '+' for ' '.
 177                         case 'url_query':
 178                         default:
 179                                 $func = 'urlencode';
 180                 }
 181                 return $parser->markerSkipCallback( $s, $func );
 182         }
 183
 184         public static function lcfirst( $parser, $s = '' ) {
 185                 global $wgContLang;
 186                 return $wgContLang->lcfirst( $s );
 187         }
 188
 189         public static function ucfirst( $parser, $s = '' ) {
 190                 global $wgContLang;
 191                 return $wgContLang->ucfirst( $s );
 192         }
 193
 194         /**
 195          * @param Parser $parser
 196          * @param string $s
 197          * @return string
 198          */
 199         public static function lc( $parser, $s = '' ) {
 200                 global $wgContLang;
 201                 return $parser->markerSkipCallback( $s, array( $wgContLang, 'lc' ) );
 202         }
 203
 204         /**
 205          * @param Parser $parser
 206          * @param string $s
 207          * @return string
 208          */
 209         public static function uc( $parser, $s = '' ) {
 210                 global $wgContLang;
 211                 return $parser->markerSkipCallback( $s, array( $wgContLang, 'uc' ) );
 212         }
 213
 214         public static function localurl( $parser, $s = '', $arg = null ) {
 215                 return self::urlFunction( 'getLocalURL', $s, $arg );
 216         }
 217
 218         public static function localurle( $parser, $s = '', $arg = null ) {
 219                 $temp = self::urlFunction( 'getLocalURL', $s, $arg );
 220                 if ( !is_string( $temp ) ) {
 221                         return $temp;
 222                 } else {
 223                         return htmlspecialchars( $temp );
 224                 }
 225         }
 226
 227         public static function fullurl( $parser, $s = '', $arg = null ) {
 228                 return self::urlFunction( 'getFullURL', $s, $arg );
 229         }
 230
 231         public static function fullurle( $parser, $s = '', $arg = null ) {
 232                 $temp = self::urlFunction( 'getFullURL', $s, $arg );
 233                 if ( !is_string( $temp ) ) {
 234                         return $temp;
 235                 } else {
 236                         return htmlspecialchars( $temp );
 237                 }
 238         }
 239
 240         public static function canonicalurl( $parser, $s = '', $arg = null ) {
 241                 return self::urlFunction( 'getCanonicalURL', $s, $arg );
 242         }
 243
 244         public static function canonicalurle( $parser, $s = '', $arg = null ) {
 245                 $temp = self::urlFunction( 'getCanonicalURL', $s, $arg );
 246                 if ( !is_string( $temp ) ) {
 247                         return $temp;
 248                 } else {
 249                         return htmlspecialchars( $temp );
 250                 }
 251         }
 252
 253         public static function urlFunction( $func, $s = '', $arg = null ) {
 254                 $title = Title::newFromText( $s );
 255                 # Due to order of execution of a lot of bits, the values might be encoded
 256                 # before arriving here; if that's true, then the title can't be created
 257                 # and the variable will fail. If we can't get a decent title from the first
 258                 # attempt, url-decode and try for a second.
 259                 if ( is_null( $title ) ) {
 260                         $title = Title::newFromURL( urldecode( $s ) );
 261                 }
 262                 if ( !is_null( $title ) ) {
 263                         # Convert NS_MEDIA -> NS_FILE
 264                         if ( $title->getNamespace() == NS_MEDIA ) {
 265                                 $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 266                         }
 267                         if ( !is_null( $arg ) ) {
 268                                 $text = $title->$func( $arg );
 269                         } else {
 270                                 $text = $title->$func();
 271                         }
 272                         return $text;
 273                 } else {
 274                         return array( 'found' => false );
 275                 }
 276         }
 277
 278         /**
 279          * @param Parser $parser
 280          * @param string $num
 281          * @param string $arg
 282          * @return string
 283          */
 284         public static function formatnum( $parser, $num = '', $arg = null ) {
 285                 if ( self::matchAgainstMagicword( 'rawsuffix', $arg ) ) {
 286                         $func = array( $parser->getFunctionLang(), 'parseFormattedNumber' );
 287                 } elseif ( self::matchAgainstMagicword( 'nocommafysuffix', $arg ) ) {
 288                         $func = array( $parser->getFunctionLang(), 'formatNumNoSeparators' );
 289                 } else {
 290                         $func = array( $parser->getFunctionLang(), 'formatNum' );
 291                 }
 292                 return $parser->markerSkipCallback( $num, $func );
 293         }
 294
 295         /**
 296          * @param Parser $parser
 297          * @param string $case
 298          * @param string $word
 299          * @return string
 300          */
 301         public static function grammar( $parser, $case = '', $word = '' ) {
 302                 $word = $parser->killMarkers( $word );
 303                 return $parser->getFunctionLang()->convertGrammar( $word, $case );
 304         }
 305
 306         /**
 307          * @param Parser $parser
 308          * @param string $username
 309          * @return string
 310          */
 311         public static function gender( $parser, $username ) {
 312                 wfProfileIn( __METHOD__ );
 313                 $forms = array_slice( func_get_args(), 2 );
 314
 315                 // Some shortcuts to avoid loading user data unnecessarily
 316                 if ( count( $forms ) === 0 ) {
 317                         wfProfileOut( __METHOD__ );
 318                         return '';
 319                 } elseif ( count( $forms ) === 1 ) {
 320                         wfProfileOut( __METHOD__ );
 321                         return $forms[0];
 322                 }
 323
 324                 $username = trim( $username );
 325
 326                 // default
 327                 $gender = User::getDefaultOption( 'gender' );
 328
 329                 // allow prefix.
 330                 $title = Title::newFromText( $username );
 331
 332                 if ( $title && $title->getNamespace() == NS_USER ) {
 333                         $username = $title->getText();
 334                 }
 335
 336                 // check parameter, or use the ParserOptions if in interface message
 337                 $user = User::newFromName( $username );
 338                 if ( $user ) {
 339                         $gender = GenderCache::singleton()->getGenderOf( $user, __METHOD__ );
 340                 } elseif ( $username === '' && $parser->getOptions()->getInterfaceMessage() ) {
 341                         $gender = GenderCache::singleton()->getGenderOf( $parser->getOptions()->getUser(), __METHOD__ );
 342                 }
 343                 $ret = $parser->getFunctionLang()->gender( $gender, $forms );
 344                 wfProfileOut( __METHOD__ );
 345                 return $ret;
 346         }
 347
 348         /**
 349          * @param Parser $parser
 350          * @param string $text
 351          * @return string
 352          */
 353         public static function plural( $parser, $text = '' ) {
 354                 $forms = array_slice( func_get_args(), 2 );
 355                 $text = $parser->getFunctionLang()->parseFormattedNumber( $text );
 356                 settype( $text, ctype_digit( $text ) ? 'int' : 'float' );
 357                 return $parser->getFunctionLang()->convertPlural( $text, $forms );
 358         }
 359
 360         /**
 361          * Override the title of the page when viewed, provided we've been given a
 362          * title which will normalise to the canonical title
 363          *
 364          * @param Parser $parser Parent parser
 365          * @param string $text Desired title text
 366          * @param string $uarg
 367          * @return string
 368          */
 369         public static function displaytitle( $parser, $text = '', $uarg = '' ) {
 370                 global $wgRestrictDisplayTitle;
 371
 372                 static $magicWords = null;
 373                 if ( is_null( $magicWords ) ) {
 374                         $magicWords = new MagicWordArray( array( 'displaytitle_noerror', 'displaytitle_noreplace' ) );
 375                 }
 376                 $arg = $magicWords->matchStartToEnd( $uarg );
 377
 378                 // parse a limited subset of wiki markup (just the single quote items)
 379                 $text = $parser->doQuotes( $text );
 380
 381                 // remove stripped text (e.g. the UNIQ-QINU stuff) that was generated by tag extensions/whatever
 382                 $text = $parser->killMarkers( $text );
 383
 384                 // list of disallowed tags for DISPLAYTITLE
 385                 // these will be escaped even though they are allowed in normal wiki text
 386                 $bad = array( 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'div', 'blockquote', 'ol', 'ul', 'li', 'hr',
 387                         'table', 'tr', 'th', 'td', 'dl', 'dd', 'caption', 'p', 'ruby', 'rb', 'rt', 'rtc', 'rp', 'br' );
 388
 389                 // disallow some styles that could be used to bypass $wgRestrictDisplayTitle
 390                 if ( $wgRestrictDisplayTitle ) {
 391                         $htmlTagsCallback = function ( &$params ) {
 392                                 $decoded = Sanitizer::decodeTagAttributes( $params );
 393
 394                                 if ( isset( $decoded['style'] ) ) {
 395                                         // this is called later anyway, but we need it right now for the regexes below to be safe
 396                                         // calling it twice doesn't hurt
 397                                         $decoded['style'] = Sanitizer::checkCss( $decoded['style'] );
 398
 399                                         if ( preg_match( '/(display|user-select|visibility)\s*:/i', $decoded['style'] ) ) {
 400                                                 $decoded['style'] = '/* attempt to bypass $wgRestrictDisplayTitle */';
 401                                         }
 402                                 }
 403
 404                                 $params = Sanitizer::safeEncodeTagAttributes( $decoded );
 405                         };
 406                 } else {
 407                         $htmlTagsCallback = null;
 408                 }
 409
 410                 // only requested titles that normalize to the actual title are allowed through
 411                 // if $wgRestrictDisplayTitle is true (it is by default)
 412                 // mimic the escaping process that occurs in OutputPage::setPageTitle
 413                 $text = Sanitizer::normalizeCharReferences( Sanitizer::removeHTMLtags(
 414                         $text,
 415                         $htmlTagsCallback,
 416                         array(),
 417                         array(),
 418                         $bad
 419                 ) );
 420                 $title = Title::newFromText( Sanitizer::stripAllTags( $text ) );
 421
 422                 if ( !$wgRestrictDisplayTitle ||
 423                         ( $title instanceof Title
 424                         && !$title->hasFragment()
 425                         && $title->equals( $parser->mTitle ) )
 426                 ) {
 427                         $old = $parser->mOutput->getProperty( 'displaytitle' );
 428                         if ( $old === false || $arg !== 'displaytitle_noreplace' ) {
 429                                 $parser->mOutput->setDisplayTitle( $text );
 430                         }
 431                         if ( $old !== false && $old !== $text && !$arg ) {
 432                                 $converter = $parser->getConverterLanguage()->getConverter();
 433                                 return '<span class="error">' .
 434                                         wfMessage( 'duplicate-displaytitle',
 435                                                 // Message should be parsed, but these params should only be escaped.
 436                                                 $converter->markNoConversion( wfEscapeWikiText( $old ) ),
 437                                                 $converter->markNoConversion( wfEscapeWikiText( $text ) )
 438                                         )->inContentLanguage()->text() .
 439                                         '</span>';
 440                         }
 441                 }
 442
 443                 return '';
 444         }
 445
 446         /**
 447          * Matches the given value against the value of given magic word
 448          *
 449          * @param string $magicword Magic word key
 450          * @param string $value Value to match
 451          * @return bool True on successful match
 452          */
 453         private static function matchAgainstMagicword( $magicword, $value ) {
 454                 $value = trim( strval( $value ) );
 455                 if ( $value === '' ) {
 456                         return false;
 457                 }
 458                 $mwObject = MagicWord::get( $magicword );
 459                 return $mwObject->matchStartToEnd( $value );
 460         }
 461
 462         public static function formatRaw( $num, $raw ) {
 463                 if ( self::matchAgainstMagicword( 'rawsuffix', $raw ) ) {
 464                         return $num;
 465                 } else {
 466                         global $wgContLang;
 467                         return $wgContLang->formatNum( $num );
 468                 }
 469         }
 470         public static function numberofpages( $parser, $raw = null ) {
 471                 return self::formatRaw( SiteStats::pages(), $raw );
 472         }
 473         public static function numberofusers( $parser, $raw = null ) {
 474                 return self::formatRaw( SiteStats::users(), $raw );
 475         }
 476         public static function numberofactiveusers( $parser, $raw = null ) {
 477                 return self::formatRaw( SiteStats::activeUsers(), $raw );
 478         }
 479         public static function numberofarticles( $parser, $raw = null ) {
 480                 return self::formatRaw( SiteStats::articles(), $raw );
 481         }
 482         public static function numberoffiles( $parser, $raw = null ) {
 483                 return self::formatRaw( SiteStats::images(), $raw );
 484         }
 485         public static function numberofadmins( $parser, $raw = null ) {
 486                 return self::formatRaw( SiteStats::numberingroup( 'sysop' ), $raw );
 487         }
 488         public static function numberofedits( $parser, $raw = null ) {
 489                 return self::formatRaw( SiteStats::edits(), $raw );
 490         }
 491         public static function pagesinnamespace( $parser, $namespace = 0, $raw = null ) {
 492                 return self::formatRaw( SiteStats::pagesInNs( intval( $namespace ) ), $raw );
 493         }
 494         public static function numberingroup( $parser, $name = '', $raw = null ) {
 495                 return self::formatRaw( SiteStats::numberingroup( strtolower( $name ) ), $raw );
 496         }
 497
 498         /**
 499          * Given a title, return the namespace name that would be given by the
 500          * corresponding magic word
 501          * Note: function name changed to "mwnamespace" rather than "namespace"
 502          * to not break PHP 5.3
 503          * @param Parser $parser
 504          * @param string $title
 505          * @return mixed|string
 506          */
 507         public static function mwnamespace( $parser, $title = null ) {
 508                 $t = Title::newFromText( $title );
 509                 if ( is_null( $t ) ) {
 510                         return '';
 511                 }
 512                 return str_replace( '_', ' ', $t->getNsText() );
 513         }
 514         public static function namespacee( $parser, $title = null ) {
 515                 $t = Title::newFromText( $title );
 516                 if ( is_null( $t ) ) {
 517                         return '';
 518                 }
 519                 return wfUrlencode( $t->getNsText() );
 520         }
 521         public static function namespacenumber( $parser, $title = null ) {
 522                 $t = Title::newFromText( $title );
 523                 if ( is_null( $t ) ) {
 524                         return '';
 525                 }
 526                 return $t->getNamespace();
 527         }
 528         public static function talkspace( $parser, $title = null ) {
 529                 $t = Title::newFromText( $title );
 530                 if ( is_null( $t ) || !$t->canTalk() ) {
 531                         return '';
 532                 }
 533                 return str_replace( '_', ' ', $t->getTalkNsText() );
 534         }
 535         public static function talkspacee( $parser, $title = null ) {
 536                 $t = Title::newFromText( $title );
 537                 if ( is_null( $t ) || !$t->canTalk() ) {
 538                         return '';
 539                 }
 540                 return wfUrlencode( $t->getTalkNsText() );
 541         }
 542         public static function subjectspace( $parser, $title = null ) {
 543                 $t = Title::newFromText( $title );
 544                 if ( is_null( $t ) ) {
 545                         return '';
 546                 }
 547                 return str_replace( '_', ' ', $t->getSubjectNsText() );
 548         }
 549         public static function subjectspacee( $parser, $title = null ) {
 550                 $t = Title::newFromText( $title );
 551                 if ( is_null( $t ) ) {
 552                         return '';
 553                 }
 554                 return wfUrlencode( $t->getSubjectNsText() );
 555         }
 556
 557         /**
 558          * Functions to get and normalize pagenames, corresponding to the magic words
 559          * of the same names
 560          * @param Parser $parser
 561          * @param string $title
 562          * @return string
 563          */
 564         public static function pagename( $parser, $title = null ) {
 565                 $t = Title::newFromText( $title );
 566                 if ( is_null( $t ) ) {
 567                         return '';
 568                 }
 569                 return wfEscapeWikiText( $t->getText() );
 570         }
 571         public static function pagenamee( $parser, $title = null ) {
 572                 $t = Title::newFromText( $title );
 573                 if ( is_null( $t ) ) {
 574                         return '';
 575                 }
 576                 return wfEscapeWikiText( $t->getPartialURL() );
 577         }
 578         public static function fullpagename( $parser, $title = null ) {
 579                 $t = Title::newFromText( $title );
 580                 if ( is_null( $t ) || !$t->canTalk() ) {
 581                         return '';
 582                 }
 583                 return wfEscapeWikiText( $t->getPrefixedText() );
 584         }
 585         public static function fullpagenamee( $parser, $title = null ) {
 586                 $t = Title::newFromText( $title );
 587                 if ( is_null( $t ) || !$t->canTalk() ) {
 588                         return '';
 589                 }
 590                 return wfEscapeWikiText( $t->getPrefixedURL() );
 591         }
 592         public static function subpagename( $parser, $title = null ) {
 593                 $t = Title::newFromText( $title );
 594                 if ( is_null( $t ) ) {
 595                         return '';
 596                 }
 597                 return wfEscapeWikiText( $t->getSubpageText() );
 598         }
 599         public static function subpagenamee( $parser, $title = null ) {
 600                 $t = Title::newFromText( $title );
 601                 if ( is_null( $t ) ) {
 602                         return '';
 603                 }
 604                 return wfEscapeWikiText( $t->getSubpageUrlForm() );
 605         }
 606         public static function rootpagename( $parser, $title = null ) {
 607                 $t = Title::newFromText( $title );
 608                 if ( is_null( $t ) ) {
 609                         return '';
 610                 }
 611                 return wfEscapeWikiText( $t->getRootText() );
 612         }
 613         public static function rootpagenamee( $parser, $title = null ) {
 614                 $t = Title::newFromText( $title );
 615                 if ( is_null( $t ) ) {
 616                         return '';
 617                 }
 618                 return wfEscapeWikiText( wfUrlEncode( str_replace( ' ', '_', $t->getRootText() ) ) );
 619         }
 620         public static function basepagename( $parser, $title = null ) {
 621                 $t = Title::newFromText( $title );
 622                 if ( is_null( $t ) ) {
 623                         return '';
 624                 }
 625                 return wfEscapeWikiText( $t->getBaseText() );
 626         }
 627         public static function basepagenamee( $parser, $title = null ) {
 628                 $t = Title::newFromText( $title );
 629                 if ( is_null( $t ) ) {
 630                         return '';
 631                 }
 632                 return wfEscapeWikiText( wfUrlEncode( str_replace( ' ', '_', $t->getBaseText() ) ) );
 633         }
 634         public static function talkpagename( $parser, $title = null ) {
 635                 $t = Title::newFromText( $title );
 636                 if ( is_null( $t ) || !$t->canTalk() ) {
 637                         return '';
 638                 }
 639                 return wfEscapeWikiText( $t->getTalkPage()->getPrefixedText() );
 640         }
 641         public static function talkpagenamee( $parser, $title = null ) {
 642                 $t = Title::newFromText( $title );
 643                 if ( is_null( $t ) || !$t->canTalk() ) {
 644                         return '';
 645                 }
 646                 return wfEscapeWikiText( $t->getTalkPage()->getPrefixedURL() );
 647         }
 648         public static function subjectpagename( $parser, $title = null ) {
 649                 $t = Title::newFromText( $title );
 650                 if ( is_null( $t ) ) {
 651                         return '';
 652                 }
 653                 return wfEscapeWikiText( $t->getSubjectPage()->getPrefixedText() );
 654         }
 655         public static function subjectpagenamee( $parser, $title = null ) {
 656                 $t = Title::newFromText( $title );
 657                 if ( is_null( $t ) ) {
 658                         return '';
 659                 }
 660                 return wfEscapeWikiText( $t->getSubjectPage()->getPrefixedURL() );
 661         }
 662
 663         /**
 664          * Return the number of pages, files or subcats in the given category,
 665          * or 0 if it's nonexistent. This is an expensive parser function and
 666          * can't be called too many times per page.
 667          * @param Parser $parser
 668          * @param string $name
 669          * @param string $arg1
 670          * @param string $arg2
 671          * @return string
 672          */
 673         public static function pagesincategory( $parser, $name = '', $arg1 = null, $arg2 = null ) {
 674                 global $wgContLang;
 675                 static $magicWords = null;
 676                 if ( is_null( $magicWords ) ) {
 677                         $magicWords = new MagicWordArray( array(
 678                                 'pagesincategory_all',
 679                                 'pagesincategory_pages',
 680                                 'pagesincategory_subcats',
 681                                 'pagesincategory_files'
 682                         ) );
 683                 }
 684                 static $cache = array();
 685
 686                 // split the given option to its variable
 687                 if ( self::matchAgainstMagicword( 'rawsuffix', $arg1 ) ) {
 688                         //{{pagesincategory:|raw[|type]}}
 689                         $raw = $arg1;
 690                         $type = $magicWords->matchStartToEnd( $arg2 );
 691                 } else {
 692                         //{{pagesincategory:[|type[|raw]]}}
 693                         $type = $magicWords->matchStartToEnd( $arg1 );
 694                         $raw = $arg2;
 695                 }
 696                 if ( !$type ) { //backward compatibility
 697                         $type = 'pagesincategory_all';
 698                 }
 699
 700                 $title = Title::makeTitleSafe( NS_CATEGORY, $name );
 701                 if ( !$title ) { # invalid title
 702                         return self::formatRaw( 0, $raw );
 703                 }
 704                 $wgContLang->findVariantLink( $name, $title, true );
 705
 706                 // Normalize name for cache
 707                 $name = $title->getDBkey();
 708
 709                 if ( !isset( $cache[$name] ) ) {
 710                         $category = Category::newFromTitle( $title );
 711
 712                         $allCount = $subcatCount = $fileCount = $pagesCount = 0;
 713                         if ( $parser->incrementExpensiveFunctionCount() ) {
 714                                 // $allCount is the total number of cat members,
 715                                 // not the count of how many members are normal pages.
 716                                 $allCount = (int)$category->getPageCount();
 717                                 $subcatCount = (int)$category->getSubcatCount();
 718                                 $fileCount = (int)$category->getFileCount();
 719                                 $pagesCount = $allCount - $subcatCount - $fileCount;
 720                         }
 721                         $cache[$name]['pagesincategory_all'] = $allCount;
 722                         $cache[$name]['pagesincategory_pages'] = $pagesCount;
 723                         $cache[$name]['pagesincategory_subcats'] = $subcatCount;
 724                         $cache[$name]['pagesincategory_files'] = $fileCount;
 725                 }
 726
 727                 $count = $cache[$name][$type];
 728                 return self::formatRaw( $count, $raw );
 729         }
 730
 731         /**
 732          * Return the size of the given page, or 0 if it's nonexistent.  This is an
 733          * expensive parser function and can't be called too many times per page.
 734          *
 735          * @param Parser $parser
 736          * @param string $page Name of page to check (Default: empty string)
 737          * @param string $raw Should number be human readable with commas or just number
 738          * @return string
 739          */
 740         public static function pagesize( $parser, $page = '', $raw = null ) {
 741                 $title = Title::newFromText( $page );
 742
 743                 if ( !is_object( $title ) ) {
 744                         return self::formatRaw( 0, $raw );
 745                 }
 746
 747                 // fetch revision from cache/database and return the value
 748                 $rev = self::getCachedRevisionObject( $parser, $title );
 749                 $length = $rev ? $rev->getSize() : 0;
 750                 return self::formatRaw( $length, $raw );
 751         }
 752
 753         /**
 754          * Returns the requested protection level for the current page. This
 755          * is an expensive parser function and can't be called too many times
 756          * per page, unless the protection levels for the given title have
 757          * already been retrieved
 758          *
 759          * @param Parser $parser
 760          * @param string $type
 761          * @param string $title
 762          *
 763          * @return string
 764          */
 765         public static function protectionlevel( $parser, $type = '', $title = '' ) {
 766                 $titleObject = Title::newFromText( $title );
 767                 if ( !( $titleObject instanceof Title ) ) {
 768                         $titleObject = $parser->mTitle;
 769                 }
 770                 if ( $titleObject->areRestrictionsLoaded() || $parser->incrementExpensiveFunctionCount() ) {
 771                         $restrictions = $titleObject->getRestrictions( strtolower( $type ) );
 772                         # Title::getRestrictions returns an array, its possible it may have
 773                         # multiple values in the future
 774                         return implode( $restrictions, ',' );
 775                 }
 776                 return '';
 777         }
 778
 779         /**
 780          * Gives language names.
 781          * @param Parser $parser
 782          * @param string $code Language code (of which to get name)
 783          * @param string $inLanguage Language code (in which to get name)
 784          * @return string
 785          */
 786         public static function language( $parser, $code = '', $inLanguage = '' ) {
 787                 $code = strtolower( $code );
 788                 $inLanguage = strtolower( $inLanguage );
 789                 $lang = Language::fetchLanguageName( $code, $inLanguage );
 790                 return $lang !== '' ? $lang : wfBCP47( $code );
 791         }
 792
 793         /**
 794          * Unicode-safe str_pad with the restriction that $length is forced to be <= 500
 795          * @param Parser $parser
 796          * @param string $string
 797          * @param int $length
 798          * @param string $padding
 799          * @param int $direction
 800          * @return string
 801          */
 802         public static function pad( $parser, $string, $length, $padding = '0', $direction = STR_PAD_RIGHT ) {
 803                 $padding = $parser->killMarkers( $padding );
 804                 $lengthOfPadding = mb_strlen( $padding );
 805                 if ( $lengthOfPadding == 0 ) {
 806                         return $string;
 807                 }
 808
 809                 # The remaining length to add counts down to 0 as padding is added
 810                 $length = min( $length, 500 ) - mb_strlen( $string );
 811                 # $finalPadding is just $padding repeated enough times so that
 812                 # mb_strlen( $string ) + mb_strlen( $finalPadding ) == $length
 813                 $finalPadding = '';
 814                 while ( $length > 0 ) {
 815                         # If $length < $lengthofPadding, truncate $padding so we get the
 816                         # exact length desired.
 817                         $finalPadding .= mb_substr( $padding, 0, $length );
 818                         $length -= $lengthOfPadding;
 819                 }
 820
 821                 if ( $direction == STR_PAD_LEFT ) {
 822                         return $finalPadding . $string;
 823                 } else {
 824                         return $string . $finalPadding;
 825                 }
 826         }
 827
 828         public static function padleft( $parser, $string = '', $length = 0, $padding = '0' ) {
 829                 return self::pad( $parser, $string, $length, $padding, STR_PAD_LEFT );
 830         }
 831
 832         public static function padright( $parser, $string = '', $length = 0, $padding = '0' ) {
 833                 return self::pad( $parser, $string, $length, $padding );
 834         }
 835
 836         /**
 837          * @param Parser $parser
 838          * @param string $text
 839          * @return string
 840          */
 841         public static function anchorencode( $parser, $text ) {
 842                 $text = $parser->killMarkers( $text );
 843                 return (string)substr( $parser->guessSectionNameFromWikiText( $text ), 1 );
 844         }
 845
 846         public static function special( $parser, $text ) {
 847                 list( $page, $subpage ) = SpecialPageFactory::resolveAlias( $text );
 848                 if ( $page ) {
 849                         $title = SpecialPage::getTitleFor( $page, $subpage );
 850                         return $title->getPrefixedText();
 851                 } else {
 852                         // unknown special page, just use the given text as its title, if at all possible
 853                         $title = Title::makeTitleSafe( NS_SPECIAL, $text );
 854                         return $title ? $title->getPrefixedText() : self::special( $parser, 'Badtitle' );
 855                 }
 856         }
 857
 858         public static function speciale( $parser, $text ) {
 859                 return wfUrlencode( str_replace( ' ', '_', self::special( $parser, $text ) ) );
 860         }
 861
 862         /**
 863          * @param Parser $parser
 864          * @param string $text The sortkey to use
 865          * @param string $uarg Either "noreplace" or "noerror" (in en)
 866          *   both suppress errors, and noreplace does nothing if
 867          *   a default sortkey already exists.
 868          * @return string
 869          */
 870         public static function defaultsort( $parser, $text, $uarg = '' ) {
 871                 static $magicWords = null;
 872                 if ( is_null( $magicWords ) ) {
 873                         $magicWords = new MagicWordArray( array( 'defaultsort_noerror', 'defaultsort_noreplace' ) );
 874                 }
 875                 $arg = $magicWords->matchStartToEnd( $uarg );
 876
 877                 $text = trim( $text );
 878                 if ( strlen( $text ) == 0 ) {
 879                         return '';
 880                 }
 881                 $old = $parser->getCustomDefaultSort();
 882                 if ( $old === false || $arg !== 'defaultsort_noreplace' ) {
 883                         $parser->setDefaultSort( $text );
 884                 }
 885
 886                 if ( $old === false || $old == $text || $arg ) {
 887                         return '';
 888                 } else {
 889                         $converter = $parser->getConverterLanguage()->getConverter();
 890                         return '<span class="error">' .
 891                                 wfMessage( 'duplicate-defaultsort',
 892                                         // Message should be parsed, but these params should only be escaped.
 893                                         $converter->markNoConversion( wfEscapeWikiText( $old ) ),
 894                                         $converter->markNoConversion( wfEscapeWikiText( $text ) )
 895                                 )->inContentLanguage()->text() .
 896                                 '</span>';
 897                 }
 898         }
 899
 900         // Usage {{filepath|300}}, {{filepath|nowiki}}, {{filepath|nowiki|300}}
 901         // or {{filepath|300|nowiki}} or {{filepath|300px}}, {{filepath|200x300px}},
 902         // {{filepath|nowiki|200x300px}}, {{filepath|200x300px|nowiki}}.
 903         public static function filepath( $parser, $name = '', $argA = '', $argB = '' ) {
 904                 $file = wfFindFile( $name );
 905
 906                 if ( $argA == 'nowiki' ) {
 907                         // {{filepath: | option [| size] }}
 908                         $isNowiki = true;
 909                         $parsedWidthParam = $parser->parseWidthParam( $argB );
 910                 } else {
 911                         // {{filepath: [| size [|option]] }}
 912                         $parsedWidthParam = $parser->parseWidthParam( $argA );
 913                         $isNowiki = ( $argB == 'nowiki' );
 914                 }
 915
 916                 if ( $file ) {
 917                         $url = $file->getFullUrl();
 918
 919                         // If a size is requested...
 920                         if ( count( $parsedWidthParam ) ) {
 921                                 $mto = $file->transform( $parsedWidthParam );
 922                                 // ... and we can
 923                                 if ( $mto && !$mto->isError() ) {
 924                                         // ... change the URL to point to a thumbnail.
 925                                         $url = wfExpandUrl( $mto->getUrl(), PROTO_RELATIVE );
 926                                 }
 927                         }
 928                         if ( $isNowiki ) {
 929                                 return array( $url, 'nowiki' => true );
 930                         }
 931                         return $url;
 932                 } else {
 933                         return '';
 934                 }
 935         }
 936
 937         /**
 938          * Parser function to extension tag adaptor
 939          * @param Parser $parser
 940          * @param PPFrame $frame
 941          * @param array $args
 942          * @return string
 943          */
 944         public static function tagObj( $parser, $frame, $args ) {
 945                 if ( !count( $args ) ) {
 946                         return '';
 947                 }
 948                 $tagName = strtolower( trim( $frame->expand( array_shift( $args ) ) ) );
 949
 950                 if ( count( $args ) ) {
 951                         $inner = $frame->expand( array_shift( $args ) );
 952                 } else {
 953                         $inner = null;
 954                 }
 955
 956                 $stripList = $parser->getStripList();
 957                 if ( !in_array( $tagName, $stripList ) ) {
 958                         return '<span class="error">' .
 959                                 wfMessage( 'unknown_extension_tag', $tagName )->inContentLanguage()->text() .
 960                                 '</span>';
 961                 }
 962
 963                 $attributes = array();
 964                 foreach ( $args as $arg ) {
 965                         $bits = $arg->splitArg();
 966                         if ( strval( $bits['index'] ) === '' ) {
 967                                 $name = trim( $frame->expand( $bits['name'], PPFrame::STRIP_COMMENTS ) );
 968                                 $value = trim( $frame->expand( $bits['value'] ) );
 969                                 if ( preg_match( '/^(?:["\'](.+)["\']|""|\'\')$/s', $value, $m ) ) {
 970                                         $value = isset( $m[1] ) ? $m[1] : '';
 971                                 }
 972                                 $attributes[$name] = $value;
 973                         }
 974                 }
 975
 976                 $params = array(
 977                         'name' => $tagName,
 978                         'inner' => $inner,
 979                         'attributes' => $attributes,
 980                         'close' => "</$tagName>",
 981                 );
 982                 return $parser->extensionSubstitution( $params, $frame );
 983         }
 984
 985         /**
 986          * Fetched the current revision of the given title and return this.
 987          * Will increment the expensive function count and
 988          * add a template link to get the value refreshed on changes.
 989          * For a given title, which is equal to the current parser title,
 990          * the revision object from the parser is used, when that is the current one
 991          *
 992          * @param Parser $parser
 993          * @param Title $title
 994          * @return Revision
 995          * @since 1.23
 996          */
 997         private static function getCachedRevisionObject( $parser, $title = null ) {
 998                 if ( is_null( $title ) ) {
 999                         return null;
1000                 }
1001
1002                 // Use the revision from the parser itself, when param is the current page
1003                 // and the revision is the current one
1004                 if ( $title->equals( $parser->getTitle() ) ) {
1005                         $parserRev = $parser->getRevisionObject();
1006                         if ( $parserRev && $parserRev->isCurrent() ) {
1007                                 // force reparse after edit with vary-revision flag
1008                                 $parser->getOutput()->setFlag( 'vary-revision' );
1009                                 wfDebug( __METHOD__ . ": use current revision from parser, setting vary-revision...\n" );
1010                                 return $parserRev;
1011                         }
1012                 }
1013
1014                 // Normalize name for cache
1015                 $page = $title->getPrefixedDBkey();
1016
1017                 if ( !( $parser->currentRevisionCache && $parser->currentRevisionCache->has( $page ) )
1018                         && !$parser->incrementExpensiveFunctionCount() ) {
1019                         return null;
1020                 }
1021                 $rev = $parser->fetchCurrentRevisionOfTitle( $title );
1022                 $pageID = $rev ? $rev->getPage() : 0;
1023                 $revID = $rev ? $rev->getId() : 0;
1024
1025                 // Register dependency in templatelinks
1026                 $parser->getOutput()->addTemplate( $title, $pageID, $revID );
1027
1028                 return $rev;
1029         }
1030
1031         /**
1032          * Get the pageid of a specified page
1033          * @param Parser $parser
1034          * @param string $title Title to get the pageid from
1035          * @return int|null|string
1036          * @since 1.23
1037          */
1038         public static function pageid( $parser, $title = null ) {
1039                 $t = Title::newFromText( $title );
1040                 if ( is_null( $t ) ) {
1041                         return '';
1042                 }
1043                 // Use title from parser to have correct pageid after edit
1044                 if ( $t->equals( $parser->getTitle() ) ) {
1045                         $t = $parser->getTitle();
1046                         return $t->getArticleID();
1047                 }
1048
1049                 // These can't have ids
1050                 if ( !$t->canExist() || $t->isExternal() ) {
1051                         return 0;
1052                 }
1053
1054                 // Check the link cache, maybe something already looked it up.
1055                 $linkCache = LinkCache::singleton();
1056                 $pdbk = $t->getPrefixedDBkey();
1057                 $id = $linkCache->getGoodLinkID( $pdbk );
1058                 if ( $id != 0 ) {
1059                         $parser->mOutput->addLink( $t, $id );
1060                         return $id;
1061                 }
1062                 if ( $linkCache->isBadLink( $pdbk ) ) {
1063                         $parser->mOutput->addLink( $t, 0 );
1064                         return $id;
1065                 }
1066
1067                 // We need to load it from the DB, so mark expensive
1068                 if ( $parser->incrementExpensiveFunctionCount() ) {
1069                         $id = $t->getArticleID();
1070                         $parser->mOutput->addLink( $t, $id );
1071                         return $id;
1072                 }
1073                 return null;
1074         }
1075
1076         /**
1077          * Get the id from the last revision of a specified page.
1078          * @param Parser $parser
1079          * @param string $title Title to get the id from
1080          * @return int|null|string
1081          * @since 1.23
1082          */
1083         public static function revisionid( $parser, $title = null ) {
1084                 $t = Title::newFromText( $title );
1085                 if ( is_null( $t ) ) {
1086                         return '';
1087                 }
1088                 // fetch revision from cache/database and return the value
1089                 $rev = self::getCachedRevisionObject( $parser, $t );
1090                 return $rev ? $rev->getId() : '';
1091         }
1092
1093         /**
1094          * Get the day from the last revision of a specified page.
1095          * @param Parser $parser
1096          * @param string $title Title to get the day from
1097          * @return string
1098          * @since 1.23
1099          */
1100         public static function revisionday( $parser, $title = null ) {
1101                 $t = Title::newFromText( $title );
1102                 if ( is_null( $t ) ) {
1103                         return '';
1104                 }
1105                 // fetch revision from cache/database and return the value
1106                 $rev = self::getCachedRevisionObject( $parser, $t );
1107                 return $rev ? MWTimestamp::getLocalInstance( $rev->getTimestamp() )->format( 'j' ) : '';
1108         }
1109
1110         /**
1111          * Get the day with leading zeros from the last revision of a specified page.
1112          * @param Parser $parser
1113          * @param string $title Title to get the day from
1114          * @return string
1115          * @since 1.23
1116          */
1117         public static function revisionday2( $parser, $title = null ) {
1118                 $t = Title::newFromText( $title );
1119                 if ( is_null( $t ) ) {
1120                         return '';
1121                 }
1122                 // fetch revision from cache/database and return the value
1123                 $rev = self::getCachedRevisionObject( $parser, $t );
1124                 return $rev ? MWTimestamp::getLocalInstance( $rev->getTimestamp() )->format( 'd' ) : '';
1125         }
1126
1127         /**
1128          * Get the month with leading zeros from the last revision of a specified page.
1129          * @param Parser $parser
1130          * @param string $title Title to get the month from
1131          * @return string
1132          * @since 1.23
1133          */
1134         public static function revisionmonth( $parser, $title = null ) {
1135                 $t = Title::newFromText( $title );
1136                 if ( is_null( $t ) ) {
1137                         return '';
1138                 }
1139                 // fetch revision from cache/database and return the value
1140                 $rev = self::getCachedRevisionObject( $parser, $t );
1141                 return $rev ? MWTimestamp::getLocalInstance( $rev->getTimestamp() )->format( 'm' ) : '';
1142         }
1143
1144         /**
1145          * Get the month from the last revision of a specified page.
1146          * @param Parser $parser
1147          * @param string $title Title to get the month from
1148          * @return string
1149          * @since 1.23
1150          */
1151         public static function revisionmonth1( $parser, $title = null ) {
1152                 $t = Title::newFromText( $title );
1153                 if ( is_null( $t ) ) {
1154                         return '';
1155                 }
1156                 // fetch revision from cache/database and return the value
1157                 $rev = self::getCachedRevisionObject( $parser, $t );
1158                 return $rev ? MWTimestamp::getLocalInstance( $rev->getTimestamp() )->format( 'n' ) : '';
1159         }
1160
1161         /**
1162          * Get the year from the last revision of a specified page.
1163          * @param Parser $parser
1164          * @param string $title Title to get the year from
1165          * @return string
1166          * @since 1.23
1167          */
1168         public static function revisionyear( $parser, $title = null ) {
1169                 $t = Title::newFromText( $title );
1170                 if ( is_null( $t ) ) {
1171                         return '';
1172                 }
1173                 // fetch revision from cache/database and return the value
1174                 $rev = self::getCachedRevisionObject( $parser, $t );
1175                 return $rev ? MWTimestamp::getLocalInstance( $rev->getTimestamp() )->format( 'Y' ) : '';
1176         }
1177
1178         /**
1179          * Get the timestamp from the last revision of a specified page.
1180          * @param Parser $parser
1181          * @param string $title Title to get the timestamp from
1182          * @return string
1183          * @since 1.23
1184          */
1185         public static function revisiontimestamp( $parser, $title = null ) {
1186                 $t = Title::newFromText( $title );
1187                 if ( is_null( $t ) ) {
1188                         return '';
1189                 }
1190                 // fetch revision from cache/database and return the value
1191                 $rev = self::getCachedRevisionObject( $parser, $t );
1192                 return $rev ? MWTimestamp::getLocalInstance( $rev->getTimestamp() )->format( 'YmdHis' ) : '';
1193         }
1194
1195         /**
1196          * Get the user from the last revision of a specified page.
1197          * @param Parser $parser
1198          * @param string $title Title to get the user from
1199          * @return string
1200          * @since 1.23
1201          */
1202         public static function revisionuser( $parser, $title = null ) {
1203                 $t = Title::newFromText( $title );
1204                 if ( is_null( $t ) ) {
1205                         return '';
1206                 }
1207                 // fetch revision from cache/database and return the value
1208                 $rev = self::getCachedRevisionObject( $parser, $t );
1209                 return $rev ? $rev->getUserText() : '';
1210         }
1211
1212         /**
1213          * Returns the sources of any cascading protection acting on a specified page.
1214          * Pages will not return their own title unless they transclude themselves.
1215          * This is an expensive parser function and can't be called too many times per page,
1216          * unless cascading protection sources for the page have already been loaded.
1217          *
1218          * @param Parser $parser
1219          * @param string $title
1220          *
1221          * @return string
1222          * @since 1.23
1223          */
1224         public static function cascadingsources( $parser, $title = '' ) {
1225                 $titleObject = Title::newFromText( $title );
1226                 if ( !( $titleObject instanceof Title ) ) {
1227                         $titleObject = $parser->mTitle;
1228                 }
1229                 if ( $titleObject->areCascadeProtectionSourcesLoaded()
1230                         || $parser->incrementExpensiveFunctionCount()
1231                 ) {
1232                         $names = array();
1233                         $sources = $titleObject->getCascadeProtectionSources();
1234                         foreach ( $sources[0] as $sourceTitle ) {
1235                                 $names[] = $sourceTitle->getPrefixedText();
1236                         }
1237                         return implode( $names, '|' );
1238                 }
1239                 return '';
1240         }
1241
1242 }