| Server IP : 167.235.224.122 / Your IP : 216.73.216.110 Web Server : Apache/2.4.58 (Ubuntu) System : Linux newplayground 6.8.0-136-generic #136-Ubuntu SMP PREEMPT_DYNAMIC Wed Jul 1 21:33:11 UTC 2026 aarch64 User : deploy ( 1000) PHP Version : 8.4.23 Disable Function : NONE MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : OFF Directory : /var/www/html/wiki/includes/title/ |
Upload File : |
<?php
/**
* A title parser service for %MediaWiki.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @author Daniel Kinzler
*/
namespace MediaWiki\Title;
use InvalidArgumentException;
use LogicException;
use MediaWiki\Interwiki\InterwikiLookup;
use MediaWiki\Language\Language;
use MediaWiki\Message\Message;
use MediaWiki\Parser\Sanitizer;
use Wikimedia\IPUtils;
/**
* A title parser service for %MediaWiki.
*
* This is designed to encapsulate knowledge about conventions for the title
* forms to be used in the database, in urls, in wikitext, etc.
*
* @see https://www.mediawiki.org/wiki/Requests_for_comment/TitleValue
* @since 1.23
*/
class TitleParser {
private Language $language;
private InterwikiLookup $interwikiLookup;
private NamespaceInfo $nsInfo;
/** @var string[] */
private array $localInterwikis;
/**
* The code here can throw MalformedTitleException, which cannot be created in
* unit tests (see T281935). Until that changes, we use this helper callback
* that can be overridden in unit tests to return a mock instead.
*
* @var callable
*/
private $createMalformedTitleException;
/**
* @param Language $language The language object to use for localizing namespace names,
* capitalization, etc.
* @param InterwikiLookup $interwikiLookup
* @param NamespaceInfo $nsInfo
* @param string[]|string $localInterwikis
*/
public function __construct(
Language $language,
InterwikiLookup $interwikiLookup,
NamespaceInfo $nsInfo,
$localInterwikis
) {
$this->language = $language;
$this->interwikiLookup = $interwikiLookup;
$this->nsInfo = $nsInfo;
$this->localInterwikis = $localInterwikis;
// Default callback is to return a real MalformedTitleException,
// callback signature matches constructor
$this->createMalformedTitleException = static function (
$errorMessage,
$titleText = null,
$errorMessageParameters = []
): MalformedTitleException {
return new MalformedTitleException( $errorMessage, $titleText, $errorMessageParameters );
};
}
/**
* @internal
* @param callable $callback
*/
public function overrideCreateMalformedTitleExceptionCallback( callable $callback ) {
// @codeCoverageIgnoreStart
if ( !defined( 'MW_PHPUNIT_TEST' ) ) {
throw new LogicException( __METHOD__ . ' can only be used in tests' );
}
// @codeCoverageIgnoreEnd
$this->createMalformedTitleException = $callback;
}
/**
* Parses the given text and constructs a TitleValue.
*
* @param string $text The text to parse
* @param int $defaultNamespace Namespace to assume by default (usually NS_MAIN)
*
* @throws MalformedTitleException
* @return TitleValue
*/
public function parseTitle( $text, $defaultNamespace = NS_MAIN ) {
// Convert things like é ā or 〗 into normalized (T16952) text
$filteredText = Sanitizer::decodeCharReferencesAndNormalize( $text );
// NOTE: this is an ugly kludge that allows this class to share the
// code for parsing with the old Title class. The parser code should
// be refactored to avoid this.
$parts = $this->splitTitleString( $filteredText, $defaultNamespace );
return new TitleValue(
$parts['namespace'],
$parts['dbkey'],
$parts['fragment'],
$parts['interwiki']
);
}
/**
* Given a namespace and title, return a TitleValue if valid, or null if invalid.
*
* @param int $namespace
* @param string $text
* @param string $fragment
* @param string $interwiki
*
* @return TitleValue|null
*/
public function makeTitleValueSafe( $namespace, $text, $fragment = '', $interwiki = '' ) {
if ( !$this->nsInfo->exists( $namespace ) ) {
return null;
}
$canonicalNs = $this->nsInfo->getCanonicalName( $namespace );
$fullText = $canonicalNs == '' ? $text : "$canonicalNs:$text";
if ( strval( $interwiki ) != '' ) {
$fullText = "$interwiki:$fullText";
}
if ( strval( $fragment ) != '' ) {
$fullText .= '#' . $fragment;
}
try {
$parts = $this->splitTitleString( $fullText );
} catch ( MalformedTitleException $e ) {
return null;
}
return new TitleValue(
$parts['namespace'], $parts['dbkey'], $parts['fragment'], $parts['interwiki'] );
}
/**
* Validates, normalizes and splits a title string.
* This is the "source of truth" for title validity.
*
* This function removes illegal characters, splits off the interwiki and
* namespace prefixes, sets the other forms, and canonicalizes
* everything.
*
* @todo this method is only exposed as a temporary measure to ease refactoring.
* It was copied with minimal changes from Title::secureAndSplit().
*
* @todo This method should be split up and an appropriate interface
* defined for use by the Title class.
*
* @param string $text
* @param int $defaultNamespace
*
* @internal
* @throws MalformedTitleException If $text is not a valid title string.
* @return array A map with the fields 'interwiki', 'fragment', 'namespace', and 'dbkey'.
*/
public function splitTitleString( $text, $defaultNamespace = NS_MAIN ) {
$dbkey = str_replace( ' ', '_', $text );
# Initialisation
$parts = [
'interwiki' => '',
'local_interwiki' => false,
'fragment' => '',
'namespace' => (int)$defaultNamespace,
'dbkey' => $dbkey,
];
# Strip Unicode bidi override characters.
# Sometimes they slip into cut-n-pasted page titles, where the
# override chars get included in list displays.
$dbkey = preg_replace( '/[\x{200E}\x{200F}\x{202A}-\x{202E}]+/u', '', $dbkey );
if ( $dbkey === null ) {
# Regex had an error. Most likely this is caused by invalid UTF-8
$exception = ( $this->createMalformedTitleException )( 'title-invalid-utf8', $text );
throw $exception;
}
# Clean up whitespace
$dbkey = preg_replace(
'/[ _\xA0\x{1680}\x{180E}\x{2000}-\x{200A}\x{2028}\x{2029}\x{202F}\x{205F}\x{3000}]+/u',
'_',
$dbkey
);
$dbkey = trim( $dbkey, '_' );
if ( strpos( $dbkey, \UtfNormal\Constants::UTF8_REPLACEMENT ) !== false ) {
# Contained illegal UTF-8 sequences or forbidden Unicode chars.
$exception = ( $this->createMalformedTitleException )( 'title-invalid-utf8', $text );
throw $exception;
}
$parts['dbkey'] = $dbkey;
# Initial colon indicates main namespace rather than specified default
# but should not create invalid {ns,title} pairs such as {0,Project:Foo}
if ( $dbkey !== '' && $dbkey[0] == ':' ) {
$parts['namespace'] = NS_MAIN;
$dbkey = substr( $dbkey, 1 ); # remove the colon but continue processing
$dbkey = trim( $dbkey, '_' ); # remove any subsequent whitespace
}
if ( $dbkey == '' ) {
$exception = ( $this->createMalformedTitleException )( 'title-invalid-empty', $text );
throw $exception;
}
# Namespace or interwiki prefix
$prefixRegexp = "/^(.+?)_*:_*(.*)$/S";
do {
$m = [];
if ( preg_match( $prefixRegexp, $dbkey, $m ) ) {
$p = $m[1];
$ns = $this->language->getNsIndex( $p );
if ( $ns !== false ) {
# Ordinary namespace
$dbkey = $m[2];
$parts['namespace'] = $ns;
# For Talk:X pages, check if X has a "namespace" prefix
if ( $ns === NS_TALK && preg_match( $prefixRegexp, $dbkey, $x ) ) {
if ( $this->language->getNsIndex( $x[1] ) ) {
# Disallow Talk:File:x type titles...
$exception = ( $this->createMalformedTitleException )(
'title-invalid-talk-namespace',
$text
);
throw $exception;
} elseif ( $this->interwikiLookup->isValidInterwiki( $x[1] ) ) {
# Disallow Talk:Interwiki:x type titles...
$exception = ( $this->createMalformedTitleException )(
'title-invalid-talk-interwiki',
$text
);
throw $exception;
}
}
} elseif ( $this->interwikiLookup->isValidInterwiki( $p ) ) {
# Interwiki link
$dbkey = $m[2];
$parts['interwiki'] = $this->language->lc( $p );
# Redundant interwiki prefix to the local wiki
foreach ( $this->localInterwikis as $localIW ) {
if ( strcasecmp( $parts['interwiki'], $localIW ) == 0 ) {
if ( $dbkey == '' ) {
# Empty self-links should point to the Main Page, to ensure
# compatibility with cross-wiki transclusions and the like.
$mainPage = Title::newMainPage();
return [
'interwiki' => $mainPage->getInterwiki(),
'local_interwiki' => true,
'fragment' => $mainPage->getFragment(),
'namespace' => $mainPage->getNamespace(),
'dbkey' => $mainPage->getDBkey(),
];
}
$parts['interwiki'] = '';
# local interwikis should behave like initial-colon links
$parts['local_interwiki'] = true;
# Do another namespace split...
continue 2;
}
}
# If there's an initial colon after the interwiki, that also
# resets the default namespace
if ( $dbkey !== '' && $dbkey[0] == ':' ) {
$parts['namespace'] = NS_MAIN;
$dbkey = substr( $dbkey, 1 );
$dbkey = trim( $dbkey, '_' );
}
}
# If there's no recognized interwiki or namespace,
# then let the colon expression be part of the title.
}
break;
} while ( true );
$fragment = strstr( $dbkey, '#' );
if ( $fragment !== false ) {
$parts['fragment'] = str_replace( '_', ' ', substr( $fragment, 1 ) );
$dbkey = substr( $dbkey, 0, strlen( $dbkey ) - strlen( $fragment ) );
# remove whitespace again: prevents "Foo_bar_#"
# becoming "Foo_bar_"
$dbkey = rtrim( $dbkey, "_" );
}
# Reject illegal characters.
$rxTc = self::getTitleInvalidRegex();
$matches = [];
if ( preg_match( $rxTc, $dbkey, $matches ) ) {
$exception = ( $this->createMalformedTitleException )( 'title-invalid-characters', $text, [ $matches[0] ] );
throw $exception;
}
# Pages with "/./" or "/../" appearing in the URLs will often be un-
# reachable due to the way web browsers deal with 'relative' URLs.
# Also, they conflict with subpage syntax. Forbid them explicitly.
if (
str_contains( $dbkey, '.' ) &&
(
$dbkey === '.' || $dbkey === '..' ||
str_starts_with( $dbkey, './' ) ||
str_starts_with( $dbkey, '../' ) ||
str_contains( $dbkey, '/./' ) ||
str_contains( $dbkey, '/../' ) ||
str_ends_with( $dbkey, '/.' ) ||
str_ends_with( $dbkey, '/..' )
)
) {
$exception = ( $this->createMalformedTitleException )( 'title-invalid-relative', $text );
throw $exception;
}
# Magic tilde sequences? Nu-uh!
if ( strpos( $dbkey, '~~~' ) !== false ) {
$exception = ( $this->createMalformedTitleException )( 'title-invalid-magic-tilde', $text );
throw $exception;
}
# Limit the size of titles to 255 bytes. This is typically the size of the
# underlying database field. We make an exception for special pages, which
# don't need to be stored in the database, and may edge over 255 bytes due
# to subpage syntax for long titles, e.g. [[Special:Block/Long name]]
$maxLength = ( $parts['namespace'] !== NS_SPECIAL ) ? 255 : 512;
if ( strlen( $dbkey ) > $maxLength ) {
$exception = ( $this->createMalformedTitleException )(
'title-invalid-too-long',
$text,
[ Message::numParam( $maxLength ), Message::numParam( strlen( $dbkey ) ) ]
);
throw $exception;
}
# Normally, all wiki links are forced to have an initial capital letter so [[foo]]
# and [[Foo]] point to the same place. Don't force it for interwikis, since the
# other site might be case-sensitive.
if ( $parts['interwiki'] === '' && $this->nsInfo->isCapitalized( $parts['namespace'] ) ) {
$dbkey = $this->language->ucfirst( $dbkey );
}
# Can't make a link to a namespace alone... "empty" local links can only be
# self-links with a fragment identifier.
if ( $dbkey == '' && $parts['interwiki'] === '' && $parts['namespace'] !== NS_MAIN ) {
$exception = ( $this->createMalformedTitleException )( 'title-invalid-empty', $text );
throw $exception;
}
// Allow IPv6 usernames to start with '::' by canonicalizing IPv6 titles.
// IP names are not allowed for accounts, and can only be referring to
// edits from the IP. Given '::' abbreviations and caps/lowercaps,
// there are numerous ways to present the same IP. Having sp:contribs scan
// them all is silly and having some show the edits and others not is
// inconsistent. Same for talk/userpages. Keep them normalized instead.
if ( $dbkey !== '' && ( $parts['namespace'] === NS_USER || $parts['namespace'] === NS_USER_TALK ) ) {
$dbkey = IPUtils::sanitizeIP( $dbkey );
// IPUtils::sanitizeIP return null only for bad input
'@phan-var string $dbkey';
}
// Any remaining initial :s are illegal.
if ( $dbkey !== '' && $dbkey[0] == ':' ) {
$exception = ( $this->createMalformedTitleException )( 'title-invalid-leading-colon', $text );
throw $exception;
}
// Fill fields
$parts['dbkey'] = $dbkey;
// Check to ensure that the return value can be used to construct a TitleValue.
// All issues should in theory be caught above, this is here to enforce consistency.
try {
TitleValue::assertValidSpec(
$parts['namespace'],
$parts['dbkey'],
$parts['fragment'],
$parts['interwiki']
);
} catch ( InvalidArgumentException $ex ) {
$exception = ( $this->createMalformedTitleException )( 'title-invalid', $text, [ $ex->getMessage() ] );
throw $exception;
}
return $parts;
}
/**
* Returns a simple regex that will match on characters and sequences invalid in titles.
* Note that this doesn't pick up many things that could be wrong with titles, but that
* replacing this regex with something valid will make many titles valid.
*
* @since 1.44
* @return string Regex string
*/
public static function getTitleInvalidRegex() {
static $rxTc = false;
if ( !$rxTc ) {
# Matching titles will be held as illegal.
$rxTc = '/' .
# Any character not allowed is forbidden...
'[^' . Title::legalChars() . ']' .
# URL percent encoding sequences interfere with the ability
# to round-trip titles -- you can't link to them consistently.
'|%[0-9A-Fa-f]{2}' .
# XML/HTML character references produce similar issues.
'|&[A-Za-z0-9\x80-\xff]+;' .
'/S';
}
return $rxTc;
}
}
/** @deprecated class alias since 1.41 */
class_alias( TitleParser::class, 'TitleParser' );