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 Parser::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 ), Parser::SFH_NO_HASH );
  61                 }
  62
  63                 $parser->setFunctionHook( 'namespace', array( __CLASS__, 'mwnamespace' ), Parser::SFH_NO_HASH );
  64                 $parser->setFunctionHook( 'int', array( __CLASS__, 'intFunction' ), Parser::SFH_NO_HASH );
  65                 $parser->setFunctionHook( 'special', array( __CLASS__, 'special' ) );
  66                 $parser->setFunctionHook( 'speciale', array( __CLASS__, 'speciale' ) );
  67                 $parser->setFunctionHook( 'tag', array( __CLASS__, 'tagObj' ), Parser::SFH_OBJECT_ARGS );
  68                 $parser->setFunctionHook( 'formatdate', array( __CLASS__, 'formatDate' ) );
  69
  70                 if ( $wgAllowDisplayTitle ) {
  71                         $parser->setFunctionHook( 'displaytitle', array( __CLASS__, 'displaytitle' ), Parser::SFH_NO_HASH );
  72                 }
  73                 if ( $wgAllowSlowParserFunctions ) {
  74                         $parser->setFunctionHook(
  75                                 'pagesinnamespace',
  76                                 array( __CLASS__, 'pagesinnamespace' ),
  77                                 Parser::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 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                 $forms = array_slice( func_get_args(), 2 );
 313
 314                 // Some shortcuts to avoid loading user data unnecessarily
 315                 if ( count( $forms ) === 0 ) {
 316                         return '';
 317                 } elseif ( count( $forms ) === 1 ) {
 318                         return $forms[0];
 319                 }
 320
 321                 $username = trim( $username );
 322
 323                 // default
 324                 $gender = User::getDefaultOption( 'gender' );
 325
 326                 // allow prefix.
 327                 $title = Title::newFromText( $username );
 328
 329                 if ( $title && $title->getNamespace() == NS_USER ) {
 330                         $username = $title->getText();
 331                 }
 332
 333                 // check parameter, or use the ParserOptions if in interface message
 334                 $user = User::newFromName( $username );
 335                 if ( $user ) {
 336                         $gender = GenderCache::singleton()->getGenderOf( $user, __METHOD__ );
 337                 } elseif ( $username === '' && $parser->getOptions()->getInterfaceMessage() ) {
 338                         $gender = GenderCache::singleton()->getGenderOf( $parser->getOptions()->getUser(), __METHOD__ );
 339                 }
 340                 $ret = $parser->getFunctionLang()->gender( $gender, $forms );
 341                 return $ret;
 342         }
 343
 344         /**
 345          * @param Parser $parser
 346          * @param string $text
 347          * @return string
 348          */
 349         public static function plural( $parser, $text = '' ) {
 350                 $forms = array_slice( func_get_args(), 2 );
 351                 $text = $parser->getFunctionLang()->parseFormattedNumber( $text );
 352                 settype( $text, ctype_digit( $text ) ? 'int' : 'float' );
 353                 return $parser->getFunctionLang()->convertPlural( $text, $forms );
 354         }
 355
 356         /**
 357          * Override the title of the page when viewed, provided we've been given a
 358          * title which will normalise to the canonical title
 359          *
 360          * @param Parser $parser Parent parser
 361          * @param string $text Desired title text
 362          * @param string $uarg
 363          * @return string
 364          */
 365         public static function displaytitle( $parser, $text = '', $uarg = '' ) {
 366                 global $wgRestrictDisplayTitle;
 367
 368                 static $magicWords = null;
 369                 if ( is_null( $magicWords ) ) {
 370                         $magicWords = new MagicWordArray( array( 'displaytitle_noerror', 'displaytitle_noreplace' ) );
 371                 }
 372                 $arg = $magicWords->matchStartToEnd( $uarg );
 373
 374                 // parse a limited subset of wiki markup (just the single quote items)
 375                 $text = $parser->doQuotes( $text );
 376
 377                 // remove stripped text (e.g. the UNIQ-QINU stuff) that was generated by tag extensions/whatever
 378                 $text = $parser->killMarkers( $text );
 379
 380                 // list of disallowed tags for DISPLAYTITLE
 381                 // these will be escaped even though they are allowed in normal wiki text
 382                 $bad = array( 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'div', 'blockquote', 'ol', 'ul', 'li', 'hr',
 383                         'table', 'tr', 'th', 'td', 'dl', 'dd', 'caption', 'p', 'ruby', 'rb', 'rt', 'rtc', 'rp', 'br' );
 384
 385                 // disallow some styles that could be used to bypass $wgRestrictDisplayTitle
 386                 if ( $wgRestrictDisplayTitle ) {
 387                         $htmlTagsCallback = function ( &$params ) {
 388                                 $decoded = Sanitizer::decodeTagAttributes( $params );
 389
 390                                 if ( isset( $decoded['style'] ) ) {
 391                                         // this is called later anyway, but we need it right now for the regexes below to be safe
 392                                         // calling it twice doesn't hurt
 393                                         $decoded['style'] = Sanitizer::checkCss( $decoded['style'] );
 394
 395                                         if ( preg_match( '/(display|user-select|visibility)\s*:/i', $decoded['style'] ) ) {
 396                                                 $decoded['style'] = '/* attempt to bypass $wgRestrictDisplayTitle */';
 397                                         }
 398                                 }
 399
 400                                 $params = Sanitizer::safeEncodeTagAttributes( $decoded );
 401                         };
 402                 } else {
 403                         $htmlTagsCallback = null;
 404                 }
 405
 406                 // only requested titles that normalize to the actual title are allowed through
 407                 // if $wgRestrictDisplayTitle is true (it is by default)
 408                 // mimic the escaping process that occurs in OutputPage::setPageTitle
 409                 $text = Sanitizer::normalizeCharReferences( Sanitizer::removeHTMLtags(
 410                         $text,
 411                         $htmlTagsCallback,
 412                         array(),
 413                         array(),
 414                         $bad
 415                 ) );
 416                 $title = Title::newFromText( Sanitizer::stripAllTags( $text ) );
 417
 418                 if ( !$wgRestrictDisplayTitle ||
 419                         ( $title instanceof Title
 420                         && !$title->hasFragment()
 421                         && $title->equals( $parser->mTitle ) )
 422                 ) {
 423                         $old = $parser->mOutput->getProperty( 'displaytitle' );
 424                         if ( $old === false || $arg !== 'displaytitle_noreplace' ) {
 425                                 $parser->mOutput->setDisplayTitle( $text );
 426                         }
 427                         if ( $old !== false && $old !== $text && !$arg ) {
 428                                 $converter = $parser->getConverterLanguage()->getConverter();
 429                                 return '<span class="error">' .
 430                                         wfMessage( 'duplicate-displaytitle',
 431                                                 // Message should be parsed, but these params should only be escaped.
 432                                                 $converter->markNoConversion( wfEscapeWikiText( $old ) ),
 433                                                 $converter->markNoConversion( wfEscapeWikiText( $text ) )
 434                                         )->inContentLanguage()->text() .
 435                                         '</span>';
 436                         }
 437                 }
 438
 439                 return '';
 440         }
 441
 442         /**
 443          * Matches the given value against the value of given magic word
 444          *
 445          * @param string $magicword Magic word key
 446          * @param string $value Value to match
 447          * @return bool True on successful match
 448          */
 449         private static function matchAgainstMagicword( $magicword, $value ) {
 450                 $value = trim( strval( $value ) );
 451                 if ( $value === '' ) {
 452                         return false;
 453                 }
 454                 $mwObject = MagicWord::get( $magicword );
 455                 return $mwObject->matchStartToEnd( $value );
 456         }
 457
 458         public static function formatRaw( $num, $raw ) {
 459                 if ( self::matchAgainstMagicword( 'rawsuffix', $raw ) ) {
 460                         return $num;
 461                 } else {
 462                         global $wgContLang;
 463                         return $wgContLang->formatNum( $num );
 464                 }
 465         }
 466         public static function numberofpages( $parser, $raw = null ) {
 467                 return self::formatRaw( SiteStats::pages(), $raw );
 468         }
 469         public static function numberofusers( $parser, $raw = null ) {
 470                 return self::formatRaw( SiteStats::users(), $raw );
 471         }
 472         public static function numberofactiveusers( $parser, $raw = null ) {
 473                 return self::formatRaw( SiteStats::activeUsers(), $raw );
 474         }
 475         public static function numberofarticles( $parser, $raw = null ) {
 476                 return self::formatRaw( SiteStats::articles(), $raw );
 477         }
 478         public static function numberoffiles( $parser, $raw = null ) {
 479                 return self::formatRaw( SiteStats::images(), $raw );
 480         }
 481         public static function numberofadmins( $parser, $raw = null ) {
 482                 return self::formatRaw( SiteStats::numberingroup( 'sysop' ), $raw );
 483         }
 484         public static function numberofedits( $parser, $raw = null ) {
 485                 return self::formatRaw( SiteStats::edits(), $raw );
 486         }
 487         public static function pagesinnamespace( $parser, $namespace = 0, $raw = null ) {
 488                 return self::formatRaw( SiteStats::pagesInNs( intval( $namespace ) ), $raw );
 489         }
 490         public static function numberingroup( $parser, $name = '', $raw = null ) {
 491                 return self::formatRaw( SiteStats::numberingroup( strtolower( $name ) ), $raw );
 492         }
 493
 494         /**
 495          * Given a title, return the namespace name that would be given by the
 496          * corresponding magic word
 497          * Note: function name changed to "mwnamespace" rather than "namespace"
 498          * to not break PHP 5.3
 499          * @param Parser $parser
 500          * @param string $title
 501          * @return mixed|string
 502          */
 503         public static function mwnamespace( $parser, $title = null ) {
 504                 $t = Title::newFromText( $title );
 505                 if ( is_null( $t ) ) {
 506                         return '';
 507                 }
 508                 return str_replace( '_', ' ', $t->getNsText() );
 509         }
 510         public static function namespacee( $parser, $title = null ) {
 511                 $t = Title::newFromText( $title );
 512                 if ( is_null( $t ) ) {
 513                         return '';
 514                 }
 515                 return wfUrlencode( $t->getNsText() );
 516         }
 517         public static function namespacenumber( $parser, $title = null ) {
 518                 $t = Title::newFromText( $title );
 519                 if ( is_null( $t ) ) {
 520                         return '';
 521                 }
 522                 return $t->getNamespace();
 523         }
 524         public static function talkspace( $parser, $title = null ) {
 525                 $t = Title::newFromText( $title );
 526                 if ( is_null( $t ) || !$t->canTalk() ) {
 527                         return '';
 528                 }
 529                 return str_replace( '_', ' ', $t->getTalkNsText() );
 530         }
 531         public static function talkspacee( $parser, $title = null ) {
 532                 $t = Title::newFromText( $title );
 533                 if ( is_null( $t ) || !$t->canTalk() ) {
 534                         return '';
 535                 }
 536                 return wfUrlencode( $t->getTalkNsText() );
 537         }
 538         public static function subjectspace( $parser, $title = null ) {
 539                 $t = Title::newFromText( $title );
 540                 if ( is_null( $t ) ) {
 541                         return '';
 542                 }
 543                 return str_replace( '_', ' ', $t->getSubjectNsText() );
 544         }
 545         public static function subjectspacee( $parser, $title = null ) {
 546                 $t = Title::newFromText( $title );
 547                 if ( is_null( $t ) ) {
 548                         return '';
 549                 }
 550                 return wfUrlencode( $t->getSubjectNsText() );
 551         }
 552
 553         /**
 554          * Functions to get and normalize pagenames, corresponding to the magic words
 555          * of the same names
 556          * @param Parser $parser
 557          * @param string $title
 558          * @return string
 559          */
 560         public static function pagename( $parser, $title = null ) {
 561                 $t = Title::newFromText( $title );
 562                 if ( is_null( $t ) ) {
 563                         return '';
 564                 }
 565                 return wfEscapeWikiText( $t->getText() );
 566         }
 567         public static function pagenamee( $parser, $title = null ) {
 568                 $t = Title::newFromText( $title );
 569                 if ( is_null( $t ) ) {
 570                         return '';
 571                 }
 572                 return wfEscapeWikiText( $t->getPartialURL() );
 573         }
 574         public static function fullpagename( $parser, $title = null ) {
 575                 $t = Title::newFromText( $title );
 576                 if ( is_null( $t ) || !$t->canTalk() ) {
 577                         return '';
 578                 }
 579                 return wfEscapeWikiText( $t->getPrefixedText() );
 580         }
 581         public static function fullpagenamee( $parser, $title = null ) {
 582                 $t = Title::newFromText( $title );
 583                 if ( is_null( $t ) || !$t->canTalk() ) {
 584                         return '';
 585                 }
 586                 return wfEscapeWikiText( $t->getPrefixedURL() );
 587         }
 588         public static function subpagename( $parser, $title = null ) {
 589                 $t = Title::newFromText( $title );
 590                 if ( is_null( $t ) ) {
 591                         return '';
 592                 }
 593                 return wfEscapeWikiText( $t->getSubpageText() );
 594         }
 595         public static function subpagenamee( $parser, $title = null ) {
 596                 $t = Title::newFromText( $title );
 597                 if ( is_null( $t ) ) {
 598                         return '';
 599                 }
 600                 return wfEscapeWikiText( $t->getSubpageUrlForm() );
 601         }
 602         public static function rootpagename( $parser, $title = null ) {
 603                 $t = Title::newFromText( $title );
 604                 if ( is_null( $t ) ) {
 605                         return '';
 606                 }
 607                 return wfEscapeWikiText( $t->getRootText() );
 608         }
 609         public static function rootpagenamee( $parser, $title = null ) {
 610                 $t = Title::newFromText( $title );
 611                 if ( is_null( $t ) ) {
 612                         return '';
 613                 }
 614                 return wfEscapeWikiText( wfUrlEncode( str_replace( ' ', '_', $t->getRootText() ) ) );
 615         }
 616         public static function basepagename( $parser, $title = null ) {
 617                 $t = Title::newFromText( $title );
 618                 if ( is_null( $t ) ) {
 619                         return '';
 620                 }
 621                 return wfEscapeWikiText( $t->getBaseText() );
 622         }
 623         public static function basepagenamee( $parser, $title = null ) {
 624                 $t = Title::newFromText( $title );
 625                 if ( is_null( $t ) ) {
 626                         return '';
 627                 }
 628                 return wfEscapeWikiText( wfUrlEncode( str_replace( ' ', '_', $t->getBaseText() ) ) );
 629         }
 630         public static function talkpagename( $parser, $title = null ) {
 631                 $t = Title::newFromText( $title );
 632                 if ( is_null( $t ) || !$t->canTalk() ) {
 633                         return '';
 634                 }
 635                 return wfEscapeWikiText( $t->getTalkPage()->getPrefixedText() );
 636         }
 637         public static function talkpagenamee( $parser, $title = null ) {
 638                 $t = Title::newFromText( $title );
 639                 if ( is_null( $t ) || !$t->canTalk() ) {
 640                         return '';
 641                 }
 642                 return wfEscapeWikiText( $t->getTalkPage()->getPrefixedURL() );
 643         }
 644         public static function subjectpagename( $parser, $title = null ) {
 645                 $t = Title::newFromText( $title );
 646                 if ( is_null( $t ) ) {
 647                         return '';
 648                 }
 649                 return wfEscapeWikiText( $t->getSubjectPage()->getPrefixedText() );
 650         }
 651         public static function subjectpagenamee( $parser, $title = null ) {
 652                 $t = Title::newFromText( $title );
 653                 if ( is_null( $t ) ) {
 654                         return '';
 655                 }
 656                 return wfEscapeWikiText( $t->getSubjectPage()->getPrefixedURL() );
 657         }
 658
 659         /**
 660          * Return the number of pages, files or subcats in the given category,
 661          * or 0 if it's nonexistent. This is an expensive parser function and
 662          * can't be called too many times per page.
 663          * @param Parser $parser
 664          * @param string $name
 665          * @param string $arg1
 666          * @param string $arg2
 667          * @return string
 668          */
 669         public static function pagesincategory( $parser, $name = '', $arg1 = null, $arg2 = null ) {
 670                 global $wgContLang;
 671                 static $magicWords = null;
 672                 if ( is_null( $magicWords ) ) {
 673                         $magicWords = new MagicWordArray( array(
 674                                 'pagesincategory_all',
 675                                 'pagesincategory_pages',
 676                                 'pagesincategory_subcats',
 677                                 'pagesincategory_files'
 678                         ) );
 679                 }
 680                 static $cache = array();
 681
 682                 // split the given option to its variable
 683                 if ( self::matchAgainstMagicword( 'rawsuffix', $arg1 ) ) {
 684                         //{{pagesincategory:|raw[|type]}}
 685                         $raw = $arg1;
 686                         $type = $magicWords->matchStartToEnd( $arg2 );
 687                 } else {
 688                         //{{pagesincategory:[|type[|raw]]}}
 689                         $type = $magicWords->matchStartToEnd( $arg1 );
 690                         $raw = $arg2;
 691                 }
 692                 if ( !$type ) { //backward compatibility
 693                         $type = 'pagesincategory_all';
 694                 }
 695
 696                 $title = Title::makeTitleSafe( NS_CATEGORY, $name );
 697                 if ( !$title ) { # invalid title
 698                         return self::formatRaw( 0, $raw );
 699                 }
 700                 $wgContLang->findVariantLink( $name, $title, true );
 701
 702                 // Normalize name for cache
 703                 $name = $title->getDBkey();
 704
 705                 if ( !isset( $cache[$name] ) ) {
 706                         $category = Category::newFromTitle( $title );
 707
 708                         $allCount = $subcatCount = $fileCount = $pagesCount = 0;
 709                         if ( $parser->incrementExpensiveFunctionCount() ) {
 710                                 // $allCount is the total number of cat members,
 711                                 // not the count of how many members are normal pages.
 712                                 $allCount = (int)$category->getPageCount();
 713                                 $subcatCount = (int)$category->getSubcatCount();
 714                                 $fileCount = (int)$category->getFileCount();
 715                                 $pagesCount = $allCount - $subcatCount - $fileCount;
 716                         }
 717                         $cache[$name]['pagesincategory_all'] = $allCount;
 718                         $cache[$name]['pagesincategory_pages'] = $pagesCount;
 719                         $cache[$name]['pagesincategory_subcats'] = $subcatCount;
 720                         $cache[$name]['pagesincategory_files'] = $fileCount;
 721                 }
 722
 723                 $count = $cache[$name][$type];
 724                 return self::formatRaw( $count, $raw );
 725         }
 726
 727         /**
 728          * Return the size of the given page, or 0 if it's nonexistent.  This is an
 729          * expensive parser function and can't be called too many times per page.
 730          *
 731          * @param Parser $parser
 732          * @param string $page Name of page to check (Default: empty string)
 733          * @param string $raw Should number be human readable with commas or just number
 734          * @return string
 735          */
 736         public static function pagesize( $parser, $page = '', $raw = null ) {
 737                 $title = Title::newFromText( $page );
 738
 739                 if ( !is_object( $title ) ) {
 740                         return self::formatRaw( 0, $raw );
 741                 }
 742
 743                 // fetch revision from cache/database and return the value
 744                 $rev = self::getCachedRevisionObject( $parser, $title );
 745                 $length = $rev ? $rev->getSize() : 0;
 746                 return self::formatRaw( $length, $raw );
 747         }
 748
 749         /**
 750          * Returns the requested protection level for the current page. This
 751          * is an expensive parser function and can't be called too many times
 752          * per page, unless the protection levels for the given title have
 753          * already been retrieved
 754          *
 755          * @param Parser $parser
 756          * @param string $type
 757          * @param string $title
 758          *
 759          * @return string
 760          */
 761         public static function protectionlevel( $parser, $type = '', $title = '' ) {
 762                 $titleObject = Title::newFromText( $title );
 763                 if ( !( $titleObject instanceof Title ) ) {
 764                         $titleObject = $parser->mTitle;
 765                 }
 766                 if ( $titleObject->areRestrictionsLoaded() || $parser->incrementExpensiveFunctionCount() ) {
 767                         $restrictions = $titleObject->getRestrictions( strtolower( $type ) );
 768                         # Title::getRestrictions returns an array, its possible it may have
 769                         # multiple values in the future
 770                         return implode( $restrictions, ',' );
 771                 }
 772                 return '';
 773         }
 774
 775         /**
 776          * Gives language names.
 777          * @param Parser $parser
 778          * @param string $code Language code (of which to get name)
 779          * @param string $inLanguage Language code (in which to get name)
 780          * @return string
 781          */
 782         public static function language( $parser, $code = '', $inLanguage = '' ) {
 783                 $code = strtolower( $code );
 784                 $inLanguage = strtolower( $inLanguage );
 785                 $lang = Language::fetchLanguageName( $code, $inLanguage );
 786                 return $lang !== '' ? $lang : wfBCP47( $code );
 787         }
 788
 789         /**
 790          * Unicode-safe str_pad with the restriction that $length is forced to be <= 500
 791          * @param Parser $parser
 792          * @param string $string
 793          * @param int $length
 794          * @param string $padding
 795          * @param int $direction
 796          * @return string
 797          */
 798         public static function pad( $parser, $string, $length, $padding = '0', $direction = STR_PAD_RIGHT ) {
 799                 $padding = $parser->killMarkers( $padding );
 800                 $lengthOfPadding = mb_strlen( $padding );
 801                 if ( $lengthOfPadding == 0 ) {
 802                         return $string;
 803                 }
 804
 805                 # The remaining length to add counts down to 0 as padding is added
 806                 $length = min( $length, 500 ) - mb_strlen( $string );
 807                 # $finalPadding is just $padding repeated enough times so that
 808                 # mb_strlen( $string ) + mb_strlen( $finalPadding ) == $length
 809                 $finalPadding = '';
 810                 while ( $length > 0 ) {
 811                         # If $length < $lengthofPadding, truncate $padding so we get the
 812                         # exact length desired.
 813                         $finalPadding .= mb_substr( $padding, 0, $length );
 814                         $length -= $lengthOfPadding;
 815                 }
 816
 817                 if ( $direction == STR_PAD_LEFT ) {
 818                         return $finalPadding . $string;
 819                 } else {
 820                         return $string . $finalPadding;
 821                 }
 822         }
 823
 824         public static function padleft( $parser, $string = '', $length = 0, $padding = '0' ) {
 825                 return self::pad( $parser, $string, $length, $padding, STR_PAD_LEFT );
 826         }
 827
 828         public static function padright( $parser, $string = '', $length = 0, $padding = '0' ) {
 829                 return self::pad( $parser, $string, $length, $padding );
 830         }
 831
 832         /**
 833          * @param Parser $parser
 834          * @param string $text
 835          * @return string
 836          */
 837         public static function anchorencode( $parser, $text ) {
 838                 $text = $parser->killMarkers( $text );
 839                 return (string)substr( $parser->guessSectionNameFromWikiText( $text ), 1 );
 840         }
 841
 842         public static function special( $parser, $text ) {
 843                 list( $page, $subpage ) = SpecialPageFactory::resolveAlias( $text );
 844                 if ( $page ) {
 845                         $title = SpecialPage::getTitleFor( $page, $subpage );
 846                         return $title->getPrefixedText();
 847                 } else {
 848                         // unknown special page, just use the given text as its title, if at all possible
 849                         $title = Title::makeTitleSafe( NS_SPECIAL, $text );
 850                         return $title ? $title->getPrefixedText() : self::special( $parser, 'Badtitle' );
 851                 }
 852         }
 853
 854         public static function speciale( $parser, $text ) {
 855                 return wfUrlencode( str_replace( ' ', '_', self::special( $parser, $text ) ) );
 856         }
 857
 858         /**
 859          * @param Parser $parser
 860          * @param string $text The sortkey to use
 861          * @param string $uarg Either "noreplace" or "noerror" (in en)
 862          *   both suppress errors, and noreplace does nothing if
 863          *   a default sortkey already exists.
 864          * @return string
 865          */
 866         public static function defaultsort( $parser, $text, $uarg = '' ) {
 867                 static $magicWords = null;
 868                 if ( is_null( $magicWords ) ) {
 869                         $magicWords = new MagicWordArray( array( 'defaultsort_noerror', 'defaultsort_noreplace' ) );
 870                 }
 871                 $arg = $magicWords->matchStartToEnd( $uarg );
 872
 873                 $text = trim( $text );
 874                 if ( strlen( $text ) == 0 ) {
 875                         return '';
 876                 }
 877                 $old = $parser->getCustomDefaultSort();
 878                 if ( $old === false || $arg !== 'defaultsort_noreplace' ) {
 879                         $parser->setDefaultSort( $text );
 880                 }
 881
 882                 if ( $old === false || $old == $text || $arg ) {
 883                         return '';
 884                 } else {
 885                         $converter = $parser->getConverterLanguage()->getConverter();
 886                         return '<span class="error">' .
 887                                 wfMessage( 'duplicate-defaultsort',
 888                                         // Message should be parsed, but these params should only be escaped.
 889                                         $converter->markNoConversion( wfEscapeWikiText( $old ) ),
 890                                         $converter->markNoConversion( wfEscapeWikiText( $text ) )
 891                                 )->inContentLanguage()->text() .
 892                                 '</span>';
 893                 }
 894         }
 895
 896         /**
 897          * Usage {{filepath|300}}, {{filepath|nowiki}}, {{filepath|nowiki|300}}
 898          * or {{filepath|300|nowiki}} or {{filepath|300px}}, {{filepath|200x300px}},
 899          * {{filepath|nowiki|200x300px}}, {{filepath|200x300px|nowiki}}.
 900          *
 901          * @param Parser $parser
 902          * @param string $name
 903          * @param string $argA
 904          * @param string $argB
 905          * @return array|string
 906          */
 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 PPNode[] $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                 $attributes = array();
 961                 foreach ( $args as $arg ) {
 962                         $bits = $arg->splitArg();
 963                         if ( strval( $bits['index'] ) === '' ) {
 964                                 $name = trim( $frame->expand( $bits['name'], PPFrame::STRIP_COMMENTS ) );
 965                                 $value = trim( $frame->expand( $bits['value'] ) );
 966                                 if ( preg_match( '/^(?:["\'](.+)["\']|""|\'\')$/s', $value, $m ) ) {
 967                                         $value = isset( $m[1] ) ? $m[1] : '';
 968                                 }
 969                                 $attributes[$name] = $value;
 970                         }
 971                 }
 972
 973                 $stripList = $parser->getStripList();
 974                 if ( !in_array( $tagName, $stripList ) ) {
 975                         // we can't handle this tag (at least not now), so just re-emit it as an ordinary tag
 976                         $attrText = '';
 977                         foreach ( $attributes as $name => $value ) {
 978                                 $attrText .= ' ' . htmlspecialchars( $name ) . '="' . htmlspecialchars( $value ) . '"';
 979                         }
 980                         if ( $inner === null ) {
 981                                 return "<$tagName$attrText/>";
 982                         }
 983                         return "<$tagName$attrText>$inner</$tagName>";
 984                 }
 985
 986                 $params = array(
 987                         'name' => $tagName,
 988                         'inner' => $inner,
 989                         'attributes' => $attributes,
 990                         'close' => "</$tagName>",
 991                 );
 992                 return $parser->extensionSubstitution( $params, $frame );
 993         }
 994
 995         /**
 996          * Fetched the current revision of the given title and return this.
 997          * Will increment the expensive function count and
 998          * add a template link to get the value refreshed on changes.
 999          * For a given title, which is equal to the current parser title,
1000          * the revision object from the parser is used, when that is the current one
1001          *
1002          * @param Parser $parser
1003          * @param Title $title
1004          * @return Revision
1005          * @since 1.23
1006          */
1007         private static function getCachedRevisionObject( $parser, $title = null ) {
1008                 if ( is_null( $title ) ) {
1009                         return null;
1010                 }
1011
1012                 // Use the revision from the parser itself, when param is the current page
1013                 // and the revision is the current one
1014                 if ( $title->equals( $parser->getTitle() ) ) {
1015                         $parserRev = $parser->getRevisionObject();
1016                         if ( $parserRev && $parserRev->isCurrent() ) {
1017                                 // force reparse after edit with vary-revision flag
1018                                 $parser->getOutput()->setFlag( 'vary-revision' );
1019                                 wfDebug( __METHOD__ . ": use current revision from parser, setting vary-revision...\n" );
1020                                 return $parserRev;
1021                         }
1022                 }
1023
1024                 // Normalize name for cache
1025                 $page = $title->getPrefixedDBkey();
1026
1027                 if ( !( $parser->currentRevisionCache && $parser->currentRevisionCache->has( $page ) )
1028                         && !$parser->incrementExpensiveFunctionCount() ) {
1029                         return null;
1030                 }
1031                 $rev = $parser->fetchCurrentRevisionOfTitle( $title );
1032                 $pageID = $rev ? $rev->getPage() : 0;
1033                 $revID = $rev ? $rev->getId() : 0;
1034
1035                 // Register dependency in templatelinks
1036                 $parser->getOutput()->addTemplate( $title, $pageID, $revID );
1037
1038                 return $rev;
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 }