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         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', 'numberofviews', '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         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         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         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         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         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         static function lcfirst( $parser, $s = '' ) {
 185                 global $wgContLang;
 186                 return $wgContLang->lcfirst( $s );
 187         }
 188
 189         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         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         static function uc( $parser, $s = '' ) {
 210                 global $wgContLang;
 211                 return $parser->markerSkipCallback( $s, array( $wgContLang, 'uc' ) );
 212         }
 213
 214         static function localurl( $parser, $s = '', $arg = null ) {
 215                 return self::urlFunction( 'getLocalURL', $s, $arg );
 216         }
 217
 218         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         static function fullurl( $parser, $s = '', $arg = null ) {
 228                 return self::urlFunction( 'getFullURL', $s, $arg );
 229         }
 230
 231         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         static function canonicalurl( $parser, $s = '', $arg = null ) {
 241                 return self::urlFunction( 'getCanonicalURL', $s, $arg );
 242         }
 243
 244         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         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         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         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         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         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          * @return string
 367          */
 368         static function displaytitle( $parser, $text = '', $uarg = '' ) {
 369                 global $wgRestrictDisplayTitle;
 370
 371                 static $magicWords = null;
 372                 if ( is_null( $magicWords ) ) {
 373                         $magicWords = new MagicWordArray( array( 'displaytitle_noerror', 'displaytitle_noreplace' ) );
 374                 }
 375                 $arg = $magicWords->matchStartToEnd( $uarg );
 376
 377                 // parse a limited subset of wiki markup (just the single quote items)
 378                 $text = $parser->doQuotes( $text );
 379
 380                 // remove stripped text (e.g. the UNIQ-QINU stuff) that was generated by tag extensions/whatever
 381                 $text = preg_replace( '/' . preg_quote( $parser->uniqPrefix(), '/' ) . '.*?'
 382                         . preg_quote( Parser::MARKER_SUFFIX, '/' ) . '/', '', $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         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         static function numberofpages( $parser, $raw = null ) {
 471                 return self::formatRaw( SiteStats::pages(), $raw );
 472         }
 473         static function numberofusers( $parser, $raw = null ) {
 474                 return self::formatRaw( SiteStats::users(), $raw );
 475         }
 476         static function numberofactiveusers( $parser, $raw = null ) {
 477                 return self::formatRaw( SiteStats::activeUsers(), $raw );
 478         }
 479         static function numberofarticles( $parser, $raw = null ) {
 480                 return self::formatRaw( SiteStats::articles(), $raw );
 481         }
 482         static function numberoffiles( $parser, $raw = null ) {
 483                 return self::formatRaw( SiteStats::images(), $raw );
 484         }
 485         static function numberofadmins( $parser, $raw = null ) {
 486                 return self::formatRaw( SiteStats::numberingroup( 'sysop' ), $raw );
 487         }
 488         static function numberofedits( $parser, $raw = null ) {
 489                 return self::formatRaw( SiteStats::edits(), $raw );
 490         }
 491         static function numberofviews( $parser, $raw = null ) {
 492                 global $wgDisableCounters;
 493                 return !$wgDisableCounters ? self::formatRaw( SiteStats::views(), $raw ) : '';
 494         }
 495         static function pagesinnamespace( $parser, $namespace = 0, $raw = null ) {
 496                 return self::formatRaw( SiteStats::pagesInNs( intval( $namespace ) ), $raw );
 497         }
 498         static function numberingroup( $parser, $name = '', $raw = null ) {
 499                 return self::formatRaw( SiteStats::numberingroup( strtolower( $name ) ), $raw );
 500         }
 501
 502         /**
 503          * Given a title, return the namespace name that would be given by the
 504          * corresponding magic word
 505          * Note: function name changed to "mwnamespace" rather than "namespace"
 506          * to not break PHP 5.3
 507          * @param Parser $parser
 508          * @param string $title
 509          * @return mixed|string
 510          */
 511         static function mwnamespace( $parser, $title = null ) {
 512                 $t = Title::newFromText( $title );
 513                 if ( is_null( $t ) ) {
 514                         return '';
 515                 }
 516                 return str_replace( '_', ' ', $t->getNsText() );
 517         }
 518         static function namespacee( $parser, $title = null ) {
 519                 $t = Title::newFromText( $title );
 520                 if ( is_null( $t ) ) {
 521                         return '';
 522                 }
 523                 return wfUrlencode( $t->getNsText() );
 524         }
 525         static function namespacenumber( $parser, $title = null ) {
 526                 $t = Title::newFromText( $title );
 527                 if ( is_null( $t ) ) {
 528                         return '';
 529                 }
 530                 return $t->getNamespace();
 531         }
 532         static function talkspace( $parser, $title = null ) {
 533                 $t = Title::newFromText( $title );
 534                 if ( is_null( $t ) || !$t->canTalk() ) {
 535                         return '';
 536                 }
 537                 return str_replace( '_', ' ', $t->getTalkNsText() );
 538         }
 539         static function talkspacee( $parser, $title = null ) {
 540                 $t = Title::newFromText( $title );
 541                 if ( is_null( $t ) || !$t->canTalk() ) {
 542                         return '';
 543                 }
 544                 return wfUrlencode( $t->getTalkNsText() );
 545         }
 546         static function subjectspace( $parser, $title = null ) {
 547                 $t = Title::newFromText( $title );
 548                 if ( is_null( $t ) ) {
 549                         return '';
 550                 }
 551                 return str_replace( '_', ' ', $t->getSubjectNsText() );
 552         }
 553         static function subjectspacee( $parser, $title = null ) {
 554                 $t = Title::newFromText( $title );
 555                 if ( is_null( $t ) ) {
 556                         return '';
 557                 }
 558                 return wfUrlencode( $t->getSubjectNsText() );
 559         }
 560
 561         /**
 562          * Functions to get and normalize pagenames, corresponding to the magic words
 563          * of the same names
 564          * @param Parser $parser
 565          * @param string $title
 566          * @return string
 567          */
 568         static function pagename( $parser, $title = null ) {
 569                 $t = Title::newFromText( $title );
 570                 if ( is_null( $t ) ) {
 571                         return '';
 572                 }
 573                 return wfEscapeWikiText( $t->getText() );
 574         }
 575         static function pagenamee( $parser, $title = null ) {
 576                 $t = Title::newFromText( $title );
 577                 if ( is_null( $t ) ) {
 578                         return '';
 579                 }
 580                 return wfEscapeWikiText( $t->getPartialURL() );
 581         }
 582         static function fullpagename( $parser, $title = null ) {
 583                 $t = Title::newFromText( $title );
 584                 if ( is_null( $t ) || !$t->canTalk() ) {
 585                         return '';
 586                 }
 587                 return wfEscapeWikiText( $t->getPrefixedText() );
 588         }
 589         static function fullpagenamee( $parser, $title = null ) {
 590                 $t = Title::newFromText( $title );
 591                 if ( is_null( $t ) || !$t->canTalk() ) {
 592                         return '';
 593                 }
 594                 return wfEscapeWikiText( $t->getPrefixedURL() );
 595         }
 596         static function subpagename( $parser, $title = null ) {
 597                 $t = Title::newFromText( $title );
 598                 if ( is_null( $t ) ) {
 599                         return '';
 600                 }
 601                 return wfEscapeWikiText( $t->getSubpageText() );
 602         }
 603         static function subpagenamee( $parser, $title = null ) {
 604                 $t = Title::newFromText( $title );
 605                 if ( is_null( $t ) ) {
 606                         return '';
 607                 }
 608                 return wfEscapeWikiText( $t->getSubpageUrlForm() );
 609         }
 610         static function rootpagename( $parser, $title = null ) {
 611                 $t = Title::newFromText( $title );
 612                 if ( is_null( $t ) ) {
 613                         return '';
 614                 }
 615                 return wfEscapeWikiText( $t->getRootText() );
 616         }
 617         static function rootpagenamee( $parser, $title = null ) {
 618                 $t = Title::newFromText( $title );
 619                 if ( is_null( $t ) ) {
 620                         return '';
 621                 }
 622                 return wfEscapeWikiText( wfUrlEncode( str_replace( ' ', '_', $t->getRootText() ) ) );
 623         }
 624         static function basepagename( $parser, $title = null ) {
 625                 $t = Title::newFromText( $title );
 626                 if ( is_null( $t ) ) {
 627                         return '';
 628                 }
 629                 return wfEscapeWikiText( $t->getBaseText() );
 630         }
 631         static function basepagenamee( $parser, $title = null ) {
 632                 $t = Title::newFromText( $title );
 633                 if ( is_null( $t ) ) {
 634                         return '';
 635                 }
 636                 return wfEscapeWikiText( wfUrlEncode( str_replace( ' ', '_', $t->getBaseText() ) ) );
 637         }
 638         static function talkpagename( $parser, $title = null ) {
 639                 $t = Title::newFromText( $title );
 640                 if ( is_null( $t ) || !$t->canTalk() ) {
 641                         return '';
 642                 }
 643                 return wfEscapeWikiText( $t->getTalkPage()->getPrefixedText() );
 644         }
 645         static function talkpagenamee( $parser, $title = null ) {
 646                 $t = Title::newFromText( $title );
 647                 if ( is_null( $t ) || !$t->canTalk() ) {
 648                         return '';
 649                 }
 650                 return wfEscapeWikiText( $t->getTalkPage()->getPrefixedURL() );
 651         }
 652         static function subjectpagename( $parser, $title = null ) {
 653                 $t = Title::newFromText( $title );
 654                 if ( is_null( $t ) ) {
 655                         return '';
 656                 }
 657                 return wfEscapeWikiText( $t->getSubjectPage()->getPrefixedText() );
 658         }
 659         static function subjectpagenamee( $parser, $title = null ) {
 660                 $t = Title::newFromText( $title );
 661                 if ( is_null( $t ) ) {
 662                         return '';
 663                 }
 664                 return wfEscapeWikiText( $t->getSubjectPage()->getPrefixedURL() );
 665         }
 666
 667         /**
 668          * Return the number of pages, files or subcats in the given category,
 669          * or 0 if it's nonexistent. This is an expensive parser function and
 670          * can't be called too many times per page.
 671          * @param Parser $parser
 672          * @param string $name
 673          * @param string $arg1
 674          * @param string $arg2
 675          * @return string
 676          */
 677         static function pagesincategory( $parser, $name = '', $arg1 = null, $arg2 = null ) {
 678                 global $wgContLang;
 679                 static $magicWords = null;
 680                 if ( is_null( $magicWords ) ) {
 681                         $magicWords = new MagicWordArray( array(
 682                                 'pagesincategory_all',
 683                                 'pagesincategory_pages',
 684                                 'pagesincategory_subcats',
 685                                 'pagesincategory_files'
 686                         ) );
 687                 }
 688                 static $cache = array();
 689
 690                 // split the given option to its variable
 691                 if ( self::matchAgainstMagicword( 'rawsuffix', $arg1 ) ) {
 692                         //{{pagesincategory:|raw[|type]}}
 693                         $raw = $arg1;
 694                         $type = $magicWords->matchStartToEnd( $arg2 );
 695                 } else {
 696                         //{{pagesincategory:[|type[|raw]]}}
 697                         $type = $magicWords->matchStartToEnd( $arg1 );
 698                         $raw = $arg2;
 699                 }
 700                 if ( !$type ) { //backward compatibility
 701                         $type = 'pagesincategory_all';
 702                 }
 703
 704                 $title = Title::makeTitleSafe( NS_CATEGORY, $name );
 705                 if ( !$title ) { # invalid title
 706                         return self::formatRaw( 0, $raw );
 707                 }
 708                 $wgContLang->findVariantLink( $name, $title, true );
 709
 710                 // Normalize name for cache
 711                 $name = $title->getDBkey();
 712
 713                 if ( !isset( $cache[$name] ) ) {
 714                         $category = Category::newFromTitle( $title );
 715
 716                         $allCount = $subcatCount = $fileCount = $pagesCount = 0;
 717                         if ( $parser->incrementExpensiveFunctionCount() ) {
 718                                 // $allCount is the total number of cat members,
 719                                 // not the count of how many members are normal pages.
 720                                 $allCount = (int)$category->getPageCount();
 721                                 $subcatCount = (int)$category->getSubcatCount();
 722                                 $fileCount = (int)$category->getFileCount();
 723                                 $pagesCount = $allCount - $subcatCount - $fileCount;
 724                         }
 725                         $cache[$name]['pagesincategory_all'] = $allCount;
 726                         $cache[$name]['pagesincategory_pages'] = $pagesCount;
 727                         $cache[$name]['pagesincategory_subcats'] = $subcatCount;
 728                         $cache[$name]['pagesincategory_files'] = $fileCount;
 729                 }
 730
 731                 $count = $cache[$name][$type];
 732                 return self::formatRaw( $count, $raw );
 733         }
 734
 735         /**
 736          * Return the size of the given page, or 0 if it's nonexistent.  This is an
 737          * expensive parser function and can't be called too many times per page.
 738          *
 739          * @param Parser $parser
 740          * @param string $page Name of page to check (Default: empty string)
 741          * @param string $raw Should number be human readable with commas or just number
 742          * @return string
 743          */
 744         static function pagesize( $parser, $page = '', $raw = null ) {
 745                 $title = Title::newFromText( $page );
 746
 747                 if ( !is_object( $title ) ) {
 748                         return self::formatRaw( 0, $raw );
 749                 }
 750
 751                 // fetch revision from cache/database and return the value
 752                 $rev = self::getCachedRevisionObject( $parser, $title );
 753                 $length = $rev ? $rev->getSize() : 0;
 754                 return self::formatRaw( $length, $raw );
 755         }
 756
 757         /**
 758          * Returns the requested protection level for the current page. This
 759          * is an expensive parser function and can't be called too many times
 760          * per page, unless the protection levels for the given title have
 761          * already been retrieved
 762          *
 763          * @param Parser $parser
 764          * @param string $type
 765          * @param string $title
 766          *
 767          * @return string
 768          */
 769         static function protectionlevel( $parser, $type = '', $title = '' ) {
 770                 $titleObject = Title::newFromText( $title );
 771                 if ( !( $titleObject instanceof Title ) ) {
 772                         $titleObject = $parser->mTitle;
 773                 }
 774                 if ( $titleObject->areRestrictionsLoaded() || $parser->incrementExpensiveFunctionCount() ) {
 775                         $restrictions = $titleObject->getRestrictions( strtolower( $type ) );
 776                         # Title::getRestrictions returns an array, its possible it may have
 777                         # multiple values in the future
 778                         return implode( $restrictions, ',' );
 779                 }
 780                 return '';
 781         }
 782
 783         /**
 784          * Gives language names.
 785          * @param Parser $parser
 786          * @param string $code Language code (of which to get name)
 787          * @param string $inLanguage Language code (in which to get name)
 788          * @return string
 789          */
 790         static function language( $parser, $code = '', $inLanguage = '' ) {
 791                 $code = strtolower( $code );
 792                 $inLanguage = strtolower( $inLanguage );
 793                 $lang = Language::fetchLanguageName( $code, $inLanguage );
 794                 return $lang !== '' ? $lang : wfBCP47( $code );
 795         }
 796
 797         /**
 798          * Unicode-safe str_pad with the restriction that $length is forced to be <= 500
 799          * @param Parser $parser
 800          * @param string $string
 801          * @param int $length
 802          * @param string $padding
 803          * @param int $direction
 804          * @return string
 805          */
 806         static function pad( $parser, $string, $length, $padding = '0', $direction = STR_PAD_RIGHT ) {
 807                 $padding = $parser->killMarkers( $padding );
 808                 $lengthOfPadding = mb_strlen( $padding );
 809                 if ( $lengthOfPadding == 0 ) {
 810                         return $string;
 811                 }
 812
 813                 # The remaining length to add counts down to 0 as padding is added
 814                 $length = min( $length, 500 ) - mb_strlen( $string );
 815                 # $finalPadding is just $padding repeated enough times so that
 816                 # mb_strlen( $string ) + mb_strlen( $finalPadding ) == $length
 817                 $finalPadding = '';
 818                 while ( $length > 0 ) {
 819                         # If $length < $lengthofPadding, truncate $padding so we get the
 820                         # exact length desired.
 821                         $finalPadding .= mb_substr( $padding, 0, $length );
 822                         $length -= $lengthOfPadding;
 823                 }
 824
 825                 if ( $direction == STR_PAD_LEFT ) {
 826                         return $finalPadding . $string;
 827                 } else {
 828                         return $string . $finalPadding;
 829                 }
 830         }
 831
 832         static function padleft( $parser, $string = '', $length = 0, $padding = '0' ) {
 833                 return self::pad( $parser, $string, $length, $padding, STR_PAD_LEFT );
 834         }
 835
 836         static function padright( $parser, $string = '', $length = 0, $padding = '0' ) {
 837                 return self::pad( $parser, $string, $length, $padding );
 838         }
 839
 840         /**
 841          * @param Parser $parser
 842          * @param string $text
 843          * @return string
 844          */
 845         static function anchorencode( $parser, $text ) {
 846                 $text = $parser->killMarkers( $text );
 847                 return (string)substr( $parser->guessSectionNameFromWikiText( $text ), 1 );
 848         }
 849
 850         static function special( $parser, $text ) {
 851                 list( $page, $subpage ) = SpecialPageFactory::resolveAlias( $text );
 852                 if ( $page ) {
 853                         $title = SpecialPage::getTitleFor( $page, $subpage );
 854                         return $title->getPrefixedText();
 855                 } else {
 856                         // unknown special page, just use the given text as its title, if at all possible
 857                         $title = Title::makeTitleSafe( NS_SPECIAL, $text );
 858                         return $title ? $title->getPrefixedText() : self::special( $parser, 'Badtitle' );
 859                 }
 860         }
 861
 862         static function speciale( $parser, $text ) {
 863                 return wfUrlencode( str_replace( ' ', '_', self::special( $parser, $text ) ) );
 864         }
 865
 866         /**
 867          * @param Parser $parser
 868          * @param string $text The sortkey to use
 869          * @param string $uarg Either "noreplace" or "noerror" (in en)
 870          *   both suppress errors, and noreplace does nothing if
 871          *   a default sortkey already exists.
 872          * @return string
 873          */
 874         public static function defaultsort( $parser, $text, $uarg = '' ) {
 875                 static $magicWords = null;
 876                 if ( is_null( $magicWords ) ) {
 877                         $magicWords = new MagicWordArray( array( 'defaultsort_noerror', 'defaultsort_noreplace' ) );
 878                 }
 879                 $arg = $magicWords->matchStartToEnd( $uarg );
 880
 881                 $text = trim( $text );
 882                 if ( strlen( $text ) == 0 ) {
 883                         return '';
 884                 }
 885                 $old = $parser->getCustomDefaultSort();
 886                 if ( $old === false || $arg !== 'defaultsort_noreplace' ) {
 887                         $parser->setDefaultSort( $text );
 888                 }
 889
 890                 if ( $old === false || $old == $text || $arg ) {
 891                         return '';
 892                 } else {
 893                         $converter = $parser->getConverterLanguage()->getConverter();
 894                         return '<span class="error">' .
 895                                 wfMessage( 'duplicate-defaultsort',
 896                                         // Message should be parsed, but these params should only be escaped.
 897                                         $converter->markNoConversion( wfEscapeWikiText( $old ) ),
 898                                         $converter->markNoConversion( wfEscapeWikiText( $text ) )
 899                                 )->inContentLanguage()->text() .
 900                                 '</span>';
 901                 }
 902         }
 903
 904         // Usage {{filepath|300}}, {{filepath|nowiki}}, {{filepath|nowiki|300}}
 905         // or {{filepath|300|nowiki}} or {{filepath|300px}}, {{filepath|200x300px}},
 906         // {{filepath|nowiki|200x300px}}, {{filepath|200x300px|nowiki}}.
 907         public static function filepath( $parser, $name = '', $argA = '', $argB = '' ) {
 908                 $file = wfFindFile( $name );
 909
 910                 if ( $argA == 'nowiki' ) {
 911                         // {{filepath: | option [| size] }}
 912                         $isNowiki = true;
 913                         $parsedWidthParam = $parser->parseWidthParam( $argB );
 914                 } else {
 915                         // {{filepath: [| size [|option]] }}
 916                         $parsedWidthParam = $parser->parseWidthParam( $argA );
 917                         $isNowiki = ( $argB == 'nowiki' );
 918                 }
 919
 920                 if ( $file ) {
 921                         $url = $file->getFullUrl();
 922
 923                         // If a size is requested...
 924                         if ( count( $parsedWidthParam ) ) {
 925                                 $mto = $file->transform( $parsedWidthParam );
 926                                 // ... and we can
 927                                 if ( $mto && !$mto->isError() ) {
 928                                         // ... change the URL to point to a thumbnail.
 929                                         $url = wfExpandUrl( $mto->getUrl(), PROTO_RELATIVE );
 930                                 }
 931                         }
 932                         if ( $isNowiki ) {
 933                                 return array( $url, 'nowiki' => true );
 934                         }
 935                         return $url;
 936                 } else {
 937                         return '';
 938                 }
 939         }
 940
 941         /**
 942          * Parser function to extension tag adaptor
 943          * @param Parser $parser
 944          * @param PPFrame $frame
 945          * @param array $args
 946          * @return string
 947          */
 948         public static function tagObj( $parser, $frame, $args ) {
 949                 if ( !count( $args ) ) {
 950                         return '';
 951                 }
 952                 $tagName = strtolower( trim( $frame->expand( array_shift( $args ) ) ) );
 953
 954                 if ( count( $args ) ) {
 955                         $inner = $frame->expand( array_shift( $args ) );
 956                 } else {
 957                         $inner = null;
 958                 }
 959
 960                 $stripList = $parser->getStripList();
 961                 if ( !in_array( $tagName, $stripList ) ) {
 962                         return '<span class="error">' .
 963                                 wfMessage( 'unknown_extension_tag', $tagName )->inContentLanguage()->text() .
 964                                 '</span>';
 965                 }
 966
 967                 $attributes = array();
 968                 foreach ( $args as $arg ) {
 969                         $bits = $arg->splitArg();
 970                         if ( strval( $bits['index'] ) === '' ) {
 971                                 $name = trim( $frame->expand( $bits['name'], PPFrame::STRIP_COMMENTS ) );
 972                                 $value = trim( $frame->expand( $bits['value'] ) );
 973                                 if ( preg_match( '/^(?:["\'](.+)["\']|""|\'\')$/s', $value, $m ) ) {
 974                                         $value = isset( $m[1] ) ? $m[1] : '';
 975                                 }
 976                                 $attributes[$name] = $value;
 977                         }
 978                 }
 979
 980                 $params = array(
 981                         'name' => $tagName,
 982                         'inner' => $inner,
 983                         'attributes' => $attributes,
 984                         'close' => "</$tagName>",
 985                 );
 986                 return $parser->extensionSubstitution( $params, $frame );
 987         }
 988
 989         /**
 990          * Fetched the current revision of the given title and return this.
 991          * Will increment the expensive function count and
 992          * add a template link to get the value refreshed on changes.
 993          * For a given title, which is equal to the current parser title,
 994          * the revision object from the parser is used, when that is the current one
 995          *
 996          * @param Parser $parser
 997          * @param Title $title
 998          * @return Revision
 999          * @since 1.23
1000          */
1001         private static function getCachedRevisionObject( $parser, $title = null ) {
1002                 static $cache = array();
1003
1004                 if ( is_null( $title ) ) {
1005                         return null;
1006                 }
1007
1008                 // Use the revision from the parser itself, when param is the current page
1009                 // and the revision is the current one
1010                 if ( $title->equals( $parser->getTitle() ) ) {
1011                         $parserRev = $parser->getRevisionObject();
1012                         if ( $parserRev && $parserRev->isCurrent() ) {
1013                                 // force reparse after edit with vary-revision flag
1014                                 $parser->getOutput()->setFlag( 'vary-revision' );
1015                                 wfDebug( __METHOD__ . ": use current revision from parser, setting vary-revision...\n" );
1016                                 return $parserRev;
1017                         }
1018                 }
1019
1020                 // Normalize name for cache
1021                 $page = $title->getPrefixedDBkey();
1022
1023                 if ( array_key_exists( $page, $cache ) ) { // cache contains null values
1024                         return $cache[$page];
1025                 }
1026                 if ( $parser->incrementExpensiveFunctionCount() ) {
1027                         $rev = Revision::newFromTitle( $title, false, Revision::READ_NORMAL );
1028                         $pageID = $rev ? $rev->getPage() : 0;
1029                         $revID = $rev ? $rev->getId() : 0;
1030                         $cache[$page] = $rev; // maybe null
1031
1032                         // Register dependency in templatelinks
1033                         $parser->getOutput()->addTemplate( $title, $pageID, $revID );
1034
1035                         return $rev;
1036                 }
1037                 $cache[$page] = null;
1038                 return null;
1039         }
1040
1041         /**
1042          * Get the pageid of a specified page
1043          * @param Parser $parser
1044          * @param string $title Title to get the pageid from
1045          * @return int|null|string
1046          * @since 1.23
1047          */
1048         public static function pageid( $parser, $title = null ) {
1049                 $t = Title::newFromText( $title );
1050                 if ( is_null( $t ) ) {
1051                         return '';
1052                 }
1053                 // Use title from parser to have correct pageid after edit
1054                 if ( $t->equals( $parser->getTitle() ) ) {
1055                         $t = $parser->getTitle();
1056                         return $t->getArticleID();
1057                 }
1058
1059                 // These can't have ids
1060                 if ( !$t->canExist() || $t->isExternal() ) {
1061                         return 0;
1062                 }
1063
1064                 // Check the link cache, maybe something already looked it up.
1065                 $linkCache = LinkCache::singleton();
1066                 $pdbk = $t->getPrefixedDBkey();
1067                 $id = $linkCache->getGoodLinkID( $pdbk );
1068                 if ( $id != 0 ) {
1069                         $parser->mOutput->addLink( $t, $id );
1070                         return $id;
1071                 }
1072                 if ( $linkCache->isBadLink( $pdbk ) ) {
1073                         $parser->mOutput->addLink( $t, 0 );
1074                         return $id;
1075                 }
1076
1077                 // We need to load it from the DB, so mark expensive
1078                 if ( $parser->incrementExpensiveFunctionCount() ) {
1079                         $id = $t->getArticleID();
1080                         $parser->mOutput->addLink( $t, $id );
1081                         return $id;
1082                 }
1083                 return null;
1084         }
1085
1086         /**
1087          * Get the id from the last revision of a specified page.
1088          * @param Parser $parser
1089          * @param string $title Title to get the id from
1090          * @return int|null|string
1091          * @since 1.23
1092          */
1093         public static function revisionid( $parser, $title = null ) {
1094                 $t = Title::newFromText( $title );
1095                 if ( is_null( $t ) ) {
1096                         return '';
1097                 }
1098                 // fetch revision from cache/database and return the value
1099                 $rev = self::getCachedRevisionObject( $parser, $t );
1100                 return $rev ? $rev->getId() : '';
1101         }
1102
1103         /**
1104          * Get the day from the last revision of a specified page.
1105          * @param Parser $parser
1106          * @param string $title Title to get the day from
1107          * @return string
1108          * @since 1.23
1109          */
1110         public static function revisionday( $parser, $title = null ) {
1111                 $t = Title::newFromText( $title );
1112                 if ( is_null( $t ) ) {
1113                         return '';
1114                 }
1115                 // fetch revision from cache/database and return the value
1116                 $rev = self::getCachedRevisionObject( $parser, $t );
1117                 return $rev ? MWTimestamp::getLocalInstance( $rev->getTimestamp() )->format( 'j' ) : '';
1118         }
1119
1120         /**
1121          * Get the day with leading zeros from the last revision of a specified page.
1122          * @param Parser $parser
1123          * @param string $title Title to get the day from
1124          * @return string
1125          * @since 1.23
1126          */
1127         public static function revisionday2( $parser, $title = null ) {
1128                 $t = Title::newFromText( $title );
1129                 if ( is_null( $t ) ) {
1130                         return '';
1131                 }
1132                 // fetch revision from cache/database and return the value
1133                 $rev = self::getCachedRevisionObject( $parser, $t );
1134                 return $rev ? MWTimestamp::getLocalInstance( $rev->getTimestamp() )->format( 'd' ) : '';
1135         }
1136
1137         /**
1138          * Get the month with leading zeros from the last revision of a specified page.
1139          * @param Parser $parser
1140          * @param string $title Title to get the month from
1141          * @return string
1142          * @since 1.23
1143          */
1144         public static function revisionmonth( $parser, $title = null ) {
1145                 $t = Title::newFromText( $title );
1146                 if ( is_null( $t ) ) {
1147                         return '';
1148                 }
1149                 // fetch revision from cache/database and return the value
1150                 $rev = self::getCachedRevisionObject( $parser, $t );
1151                 return $rev ? MWTimestamp::getLocalInstance( $rev->getTimestamp() )->format( 'm' ) : '';
1152         }
1153
1154         /**
1155          * Get the month from the last revision of a specified page.
1156          * @param Parser $parser
1157          * @param string $title Title to get the month from
1158          * @return string
1159          * @since 1.23
1160          */
1161         public static function revisionmonth1( $parser, $title = null ) {
1162                 $t = Title::newFromText( $title );
1163                 if ( is_null( $t ) ) {
1164                         return '';
1165                 }
1166                 // fetch revision from cache/database and return the value
1167                 $rev = self::getCachedRevisionObject( $parser, $t );
1168                 return $rev ? MWTimestamp::getLocalInstance( $rev->getTimestamp() )->format( 'n' ) : '';
1169         }
1170
1171         /**
1172          * Get the year from the last revision of a specified page.
1173          * @param Parser $parser
1174          * @param string $title Title to get the year from
1175          * @return string
1176          * @since 1.23
1177          */
1178         public static function revisionyear( $parser, $title = null ) {
1179                 $t = Title::newFromText( $title );
1180                 if ( is_null( $t ) ) {
1181                         return '';
1182                 }
1183                 // fetch revision from cache/database and return the value
1184                 $rev = self::getCachedRevisionObject( $parser, $t );
1185                 return $rev ? MWTimestamp::getLocalInstance( $rev->getTimestamp() )->format( 'Y' ) : '';
1186         }
1187
1188         /**
1189          * Get the timestamp from the last revision of a specified page.
1190          * @param Parser $parser
1191          * @param string $title Title to get the timestamp from
1192          * @return string
1193          * @since 1.23
1194          */
1195         public static function revisiontimestamp( $parser, $title = null ) {
1196                 $t = Title::newFromText( $title );
1197                 if ( is_null( $t ) ) {
1198                         return '';
1199                 }
1200                 // fetch revision from cache/database and return the value
1201                 $rev = self::getCachedRevisionObject( $parser, $t );
1202                 return $rev ? MWTimestamp::getLocalInstance( $rev->getTimestamp() )->format( 'YmdHis' ) : '';
1203         }
1204
1205         /**
1206          * Get the user from the last revision of a specified page.
1207          * @param Parser $parser
1208          * @param string $title Title to get the user from
1209          * @return string
1210          * @since 1.23
1211          */
1212         public static function revisionuser( $parser, $title = null ) {
1213                 $t = Title::newFromText( $title );
1214                 if ( is_null( $t ) ) {
1215                         return '';
1216                 }
1217                 // fetch revision from cache/database and return the value
1218                 $rev = self::getCachedRevisionObject( $parser, $t );
1219                 return $rev ? $rev->getUserText() : '';
1220         }
1221
1222         /**
1223          * Returns the sources of any cascading protection acting on a specified page.
1224          * Pages will not return their own title unless they transclude themselves.
1225          * This is an expensive parser function and can't be called too many times per page,
1226          * unless cascading protection sources for the page have already been loaded.
1227          *
1228          * @param Parser $parser
1229          * @param string $title
1230          *
1231          * @return string
1232          * @since 1.23
1233          */
1234         public static function cascadingsources( $parser, $title = '' ) {
1235                 $titleObject = Title::newFromText( $title );
1236                 if ( !( $titleObject instanceof Title ) ) {
1237                         $titleObject = $parser->mTitle;
1238                 }
1239                 if ( $titleObject->areCascadeProtectionSourcesLoaded()
1240                         || $parser->incrementExpensiveFunctionCount()
1241                 ) {
1242                         $names = array();
1243                         $sources = $titleObject->getCascadeProtectionSources();
1244                         foreach ( $sources[0] as $sourceTitle ) {
1245                                 $names[] = $sourceTitle->getPrefixedText();
1246                         }
1247                         return implode( $names, '|' );
1248                 }
1249                 return '';
1250         }
1251
1252 }