Release notes/1.34

MediaWiki 1.34


MediaWiki 1.34.4


This is a maintenance release of the MediaWiki 1.34 branch.

Changes since MediaWiki 1.34.3

  • Fixed issue relating to backporting of changes for task T260485.

MediaWiki 1.34.3


This is a security and maintenance release of the MediaWiki 1.34 branch.

Changes since MediaWiki 1.34.2

  • In the web installer, use secure session cookies.
  • Make UsersPager::requestedGroup public.
  • (task T257407) Split patch-drop-user-fields.sql into patch per table.
  • (task T257356) Split patch-drop-comment-fields.sql into patch per table.
  • (task T257997) Undeprecate WebInstaller::getInfoBox().
  • Added $wgForceHTTPS , which makes the HTTP to HTTPS redirect be unconditional and suppresses various hacks needed to support mixed HTTP/HTTPS wikis. We recommend this be set to true on pure HTTPS wikis.
  • Added $wgCookieSameSite , which allows login cookies to be sent with SameSite=None. This is required for cross-site CentralAuth autologin after Chrome 84.
  • Added $wgUseSameSiteLegacyCookies , which adds a compatibility hack to SameSite=None cookies for browsers which implemented an incompatible draft version of the specification.
  • (task T257207) shell: Expand documentation in firejail.profile.
  • (task T246135) Give the "remember me" checkbox a specific CSS class so skins like Minerva can only hide that checkbox.
  • (task T256287) rdbms: improve DBConnRef domain selection exception message.
  • (task T248191, task T259123) phpunit: Acknowledge known dberror from SpecialPageFatalTest.
  • (task T256394, task T259123) Cleanup up excess commit() call in LocalRepoTest.
  • Fix runBatchedQuery.php for no result from select.
  • (task T130906) Add Edge to MediaWiki:Clearyourcache.
  • (task T249521) reassignEdits: Update script to use User::newFromName for anon users.
  • (task T172060) GlobalFunctions: Use php_uname instead of posix_uname.
  • Use IPset in MWRestrictions::checkIP.
  • (task T260031) Add application/font-sfnt to MimeMap for ttf files.
  • shell: Make ->restrict( RESTRICT_NONE ) actually work.
  • (task T183759) Fixes shell edge-cases in Windows.
  • (task T258390) Add CentralIdLookup::factoryNonLocal().
  • (task T246991) User: Fix pingLimiter() to use makeGlobalKey() for global rate limits.
  • (task T232568, CVE-2020-25813) SECURITY: Special:UserRights exposes the existence of hidden users.
  • (task T251661, CVE-2020-25827) SECURITY: User::pingLimiter: add user-global rate limit type.
  • (task T246991) User: enforce pingLimiter() expiry time.
  • (task T260232) don't include null page ids in query list for category dumps.
  • (task T251506) Sanitizer: Truncate IDs to a reasonable length.
  • (task T262900) Fix failure of rebuildLocalisationCache.php due to a ResourceLoader hook.
  • Explicitly wrap some XML calls in libxml_disable_entity_loader().
  • (task T263455, task T247285) Set EnableJavaScriptTest to true in includes/DevelopmentSettings.php.
  • (task T232568, CVE-2020-25813) SECURITY: SpecialUserrights: If a viewer lacks `hideuser`, ignore hidden users.
  • (task T255918, CVE-2020-25812) SECURITY: Unescaped message used in HTML on Special:Contributions.
  • (task T256171, CVE-2020-25815) SECURITY: Unescaped message used in HTML within LogEventsList.
  • (task T258763, CVE-2020-17367, CVE-2020-17368) SECURITY: Prevent invoking firejail's --output functionality.
  • (task T86738, CVE-2020-25814) SECURITY: mediawiki.jqueryMsg: Sanitize URLs and 'style' attribute.
  • (task T115888, CVE-2020-25828) SECURITY: mediawiki.js: Escape HTML in mw.message( ... ).parse().
  • (task T260485, CVE-2020-25869) SECURITY: ActorMigration: Load user from the correct database.
  • (task T260485, CVE-2020-25869) SECURITY: ensure actor ID from correct wiki is used.

MediaWiki 1.34.2


This is a security and maintenance release of the MediaWiki 1.34 branch.

Changes since MediaWiki 1.34.1


MediaWiki 1.34.1


This is a security and maintenance release of the MediaWiki 1.34 branch.

Changes since MediaWiki 1.34.0

  • (task T211450) User: better error message when getActorId fails.
  • (task T241340) Don't redefine MW_ENTRY_POINT in thumb.php if already defined.
  • (task T236444) User: Allow newSystemUser() to create over anonymous actors.
  • (task T238483) Fix NewPagesPager "hide registered users" option.
  • (task T245072) mediawiki.language: Rename languageData back to languageNames.
  • Use proper SemVer comparison in CheckComposerLockUpToDate.
  • (task T212738) Add the MW_VERSION constant, global $wgVersion is soft deprecated.
  • (task T246127) Fix error when initialising updateCollation.php.
  • Update comment about PHP versions supported by The PHP Group.
  • (task T247215) Fix output of RecountCategories::doWork().
  • Add check for page existence to view.php maintenance script.
  • (task T245149) Fix fetching login token from action=query&meta=tokens on private wikis.
  • (task T236509) SECURITY: Fix HTML escaping in UserGroupMembership::getLink().
  • (task T232932) SECURITY: User content can redirect the logout button to different URL.
  • (task T246602) SECURITY: jquery.makeCollapsible allows applying event handler to any CSS selector.

MediaWiki 1.34.0


Changes since MediaWiki 1.34.0-rc.1

  • $wgDiffEngine (task T237049) – This configuration can be used to specify which difference engine to use. MediaWiki continues to default to automatically choosing the first of $wgExternalDiffEngine , wikidiff2, or php that is usable.
  • (task T231866) SqlBlobStore no longer needs Language object.
  • (task T236735) WikiExporter: Remove unnecessary check for SCHEMA_COMPAT_WRITE_OLD flag.
  • (task T231673) Set MCR migration stage to SCHEMA_COMPAT_NEW.
  • (task T229601) Make sure DBLoadBalancerFactory service is not disabled.
  • (task T232866) Fix support for HTTP/2 in MultiHttpClient.
  • (task T231866) LocalisationCache: Don't instantiate ResourceLoader.
  • (task T227461) Stop calling deprecated Redis delete functions.
  • (task T239561) Mark options as requiring parameters in addSite.php.
  • (task T232866) Mimic CURLOPT_POST in GuzzleHttpRequest.
  • (task T239734) Replace deprecated lSize with lLen in Redis code.
  • (task T192134) SECURITY: Do not allow user scripts on Special:PasswordReset.
  • (task T239428) ApiEditPage: Test for bad redirect targets.
  • (task T233342) rdbms: Log debug message traces as 'exception.trace' instead of 'trace'.
  • (task T226751) media: Log and fail gracefully on invalid EXIF coordinates.
  • (task T240924) NewPagesPager: Fix namespace query conditions.
  • (task T212067) Tests for an old PHP bug in parse_url.

MediaWiki 1.34.0-rc.1


Changes since MediaWiki 1.34.0-rc.0

  • (task T231742) rdbms: Restore debug toolbar "Queries" feature.
  • (task T231366) The ProfilerOutputDb class, 'profiling' table, and profileinfo.php entry point had been deprecated.
  • (task T234361) localisation: Add debug message for backend of MessageCache.
  • (task T234361) session: Add debug message for the used store class.
  • (task T235559) Fix example Kask configuration in RESTBagOStuff class comment.
  • (task T235137) Don't apply styling for Special:Contributions on other pages.
  • Upgrade mediawiki-codesniffer from 26.0.0 to 28.0.0 (dev-only).
  • (task T219604) The "jquery.ui.*" and "jquery.effects.*" modules are now deprecated as aliases for the "jquery.ui" module.
  • (task T235392) Deprecate setting Parser::mTitle to null.
  • Supporting commits for T235392 were also backported to prevent divergence from master (MediaWiki 1.35).
  • (task T234581) The 'jquery.tabIndex' module is deprecated.
  • Fix docs for GetUserBlock hooks.
  • Parser: Hard deprecate getConverterLanguage.
  • (task T236810) A number of public methods of Parser were exposed only for historical reasons and have been deprecated: doMagicLinks, doDoubleUnderscore, doHeadings, doAllQuotes, replaceExternalLinks, replaceInternalLinks, replaceInternalLinks2, getVariableValue, initialiseVariables, formatHeadings, testPst, testPreprocess, testSrvus, areSubpagesAllowed, maybeDoSubpageLink, splitWhitespace, createAssocArgs, armorLinks, makeKnownLinkHolder, getImageParams, parseLinkParameter, stripAltText, replaceLinkHolders, replaceLinkHoldersText, armorLinks, makeKnownLinkHolder, getImageParams, parseLinkParameter, stripAltText.
  • (task T30798) $wgServer must now always be set in LocalSettings.php. This is most likely the case already for any wiki installed after 1.18. The autodetection system was informally deprecated since 1.18 and vulnerable to cache poisoning attacks. Older wikis may need to update their LocalSettings.php file.
  • (task T232169) Hard deprecate $wgSysopEmailBans .
  • (task T236628) Fix for ArticleRevisionViewCustom hook in DifferenceEngine.php.
  • (task T181658) Do not insert page titles into querycache.qc_value.
  • ParamValidator has been flagged as unstable.
  • Hard deprecate Parser::disableCache().

Upgrading notes for 1.34


1.34 has several database changes since 1.33, and will not work without schema updates. Note that due to changes to some very large tables like the revision table, the schema update may take quite long (minutes on a medium sized site, many hours on a large site).

Don't forget to always back up your database before upgrading!

See the file UPGRADE for more detailed upgrade instructions, including important information when upgrading from versions prior to 1.11.

Some specific notes for MediaWiki 1.34 upgrades are below:

  • MediaWiki now requires PHP 7.2.9 or above.
  • MediaWiki no longer supports HHVM.

For notes on 1.33.x and older releases, see HISTORY.

Configuration changes for system administrators in 1.34


In an effort to enforce best practices for passwords, MediaWiki will now warn users, and suggest that they change their password, if it is in the list of 100,000 commonly used passwords that are considered bad passwords. If you want to disable this for your users, please add the following to your local settings:

$wgPasswordPolicy['policies']['default']['PasswordNotInLargeBlacklist'] = false;

New configuration

  • $wgAllowExternalReqID (task T201409) - This configuration setting controls whether MediaWiki accepts the request ID set by the incoming request via the `X-Request-Id` header. If set to `true`, that value will be used throughout the code as the request identificator. Otherwise, the sent header will be ignored and the request ID will either be taken from Apache's mod_unique module or will be generated by MediaWiki itself (depending on the set-up).
  • $wgEnableSpecialMute (task T218265) - This configuration controls whether Special:Mute is available and whether to include a link to it on emails originating from Special:Email.
  • editmyuserjsredirect user right – users without this right now cannot edit JS redirects in their userspace unless the target of the redirect is also in their userspace. By default, this right is given to everyone.
  • (task T226733) Add rate limiter to Special:ConfirmEmail.

Changed configuration


Removed configuration


New user-facing features in 1.34

  • Special:Mute has been added as a quick way for users to block unwanted emails from other users originating from Special:EmailUser.
  • (task T207577) Special:NewSection has been created as a shortcut to creating a new section on a page. When linked to, its subpage is used as the target (Special:NewSection/Test redirects to creating a new section in "Test"). Otherwise, it displays a basic interface to allow the end user to specify the target manually.
  • (task T220447) Special:Contributions/newbies has been removed for performance and usefulness reasons. Use Special:RecentChanges?userExpLevel=newcomer instead.
  • Special:NewFiles/newbies has been removed for performance and usefulness reasons. Use Special:RecentChanges?userExpLevel=newcomer&namespace=6 instead.

New developer features in 1.34

  • The ImgAuthModifyHeaders hook was added to img_auth.php to allow modification of headers in private wikis.
  • Language::formatTimePeriod now supports the new 'avoidhours' option to output strings like "5 days ago" instead of "5 days 13 hours ago".
  • (task T220163) Added SpecialMuteModifyFormFields hook to allow extensions to add fields to Special:Mute.
  • (task T100896) Skin authors can define custom OOUI themes using OOUIThemePaths. See for details.
  • (task T229035) The GetUserBlock hook was added. Use this instead of GetBlockedStatus.
  • ObjectFactory is available as a service. When used as a service, the object specs can now specify needed DI services.
  • (task T222388) Special pages can now be specified as an ObjectFactory spec, allowing the construction of special pages that require services to be injected in their constructor.
  • (task T222388) API modules can now be specified as an ObjectFactory spec, allowing the construction of modules that require services to be injected in their constructor.
  • (task T117736) The function signature of SpecialContributions::getForm::filters has changed. It now expects definitions of additional filter fields as array rather than string.

External library changes in 1.34


Changed external libraries


Removed external libraries

  • The jquery.async module, deprecated in 1.33, was removed.

Bug fixes in 1.34

  • (task T222529) If a log entry or page revision is recorded in the database with an empty username, attempting to display it will log an error and return a "no username available" to the user instead of silently displaying nothing or invalid links.

Action API changes in 1.34

  • The 'recenteditcount' response property from action=query list=allusers, deprecated in 1.25, has been removed.
  • (task T60993) action=query list=filearchive, list=alldeletedrevisions and prop=deletedrevisions no longer require the 'deletedhistory' user right.
  • In the response to queries that use 'prop=imageinfo', entries for non-existing files (indicated by the 'filemissing' field) now omit the following fields, since they are meaningless in this context: 'timestamp', 'userhidden', 'user', 'userid', 'anon', 'size', 'width', 'height', 'pagecount', 'duration', 'commenthidden', 'parsedcomment', 'comment', 'thumburl', 'thumbwidth', 'thumbheight', 'thumbmime', 'thumberror', 'url', 'sha1', 'metadata', 'extmetadata', 'commonmetadata', 'mime', 'mediadtype', 'bitdepth'. Clients that process these fields should first check if 'filemissing' is set. Fields that are supported even if the file is missing include: 'canonicaltitle', 'archivename' (deleted files only), 'descriptionurl', 'descriptionshorturl'.
  • The 'blockexpiry' result property in list=users and list=allusers will now be returned in the same format used by the rest of the API: ISO 8601 for expiring blocks, and "infinite" for non-expiring blocks.

Action API internal changes in 1.34

  • The exception thrown in ApiModuleManager::getModule has been changed from an MWException to an UnexpectedValueException, thrown by ObjectFactory. ApiModuleManager::getModule now also throws InvalidArgumentExceptions when ObjectFactory is presented with an invalid spec or incorrectly constructed objects.
  • Added ApiQueryBlockInfoTrait.

Languages updated in 1.34


MediaWiki supports over 350 languages. Many localisations are updated regularly. Below only new and removed languages are listed, as well as changes to languages because of Phabricator reports.

Breaking changes in 1.34

  • The global functions wfSuppressWarnings and wfRestoreWarnings, deprecated in 1.26, have been removed. Use Wikimedia\AtEase\AtEase::suppressWarnings() and Wikimedia\AtEase\AtEase::restoreWarnings() directly.
  • Preferences class, deprecated in 1.31, has been removed.
  • The following parts of code, deprecated in 1.32, were removed in favor of built-in PHP functions:
    • CryptRand class
    • CryptRand service
    • Functions of the MWCryptRand class: singleton(), wasStrong() and generate().
  • Various Special Page PHP Classes were renamed (mostly casing changes):
    • SpecialAncientpages => SpecialAncientPages
    • SpecialConfirmemail => SpecialConfirmEmail
    • SpecialDeadendpages => SpecialDeadendPages
    • SpecialFewestrevisions => SpecialFewestRevisions
    • SpecialListredirects => SpecialListRedirects
    • SpecialLonelypages => SpecialLonelyPages
    • SpecialLongpages => SpecialLongPages
    • SpecialMIMEsearch => SpecialMIMESearch
    • SpecialMostcategories => SpecialMostCategories
    • SpecialMostinterwikis => SpecialMostInterwikis
    • SpecialMostlinked => SpecialMostLinked
    • SpecialMostlinkedcategories => SpecialMostLinkedCategories
    • SpecialMostlinkedtemplates => SpecialMostLinkedTemplates
    • SpecialMostrevisions => SpecialMostRevisions
    • SpecialNewimages => SpecialNewFiles
    • SpecialShortpages => SpecialShortPages
    • SpecialUncategorizedcategories => SpecialUncategorizedCategories
    • SpecialUncategorizedimages => SpecialUncategorizedImages
    • SpecialUncategorizedpages => SpecialUncategorizedPages
    • SpecialUncategorizedtemplates => SpecialUncategorizedTemplates
    • SpecialUnusedcategories => SpecialUnusedCategories
    • SpecialUnusedimages => SpecialUnusedImages
    • SpecialUnusedtemplates => SpecialUnusedTemplates
    • SpecialUnwatchedpages => SpecialUnwatchedPages
    • SpecialWantedcategories => SpecialWantedCategories
    • SpecialWantedtemplates => SpecialWantedTemplates
    • SpecialWithoutinterwiki => SpecialWithoutInterwiki
  • Language::setCode, deprecated in 1.32, was removed. Use Language::factory to create a new Language object with a different language code.
  • MWNamespace::clearCaches() has been removed. So has the $rebuild parameter to MWNamespace::getCanonicalNamespaces(), which was deprecated since 1.31. Instead, reset services, such as by calling $this->overrideMwServices() (if your test extends MediaWikiTestCase). Services will generally not pick up configuration changes from after they were created, so you must reset services after any configuration change. Even if your code works now, it is likely to break in future versions as more code is moved to services.
  • The ill-defined "DatabaseOraclePostInit" hook has been removed.
  • PreferencesFormLegacy and PreferencesForm classes, deprecated in 1.32, have been removed.
  • ObjectFactory class, deprecated in 1.31, has been removed.
  • HWLDFWordAccumudlator class, deprecated in 1.28, has been removed.
  • XMPInfo, XMPReader and XMPValidate, deprecated in 1.32, have been removed.
  • The RedirectSpecialPage::execute method could sometimes return a Title object. This behavior was removed, and the method now matches the parent signature (SpecialPage::execute) which is to return HTML string or void. To obtain the destination title, use RedirectSpecialPage::getRedirect.
  • The 'recenteditcount' response property from action API action=query list=allusers, deprecated in 1.25, has been removed.
  • SearchEngine::userNamespaces(), SearchEngine::namespacesAsText(), SearchEngine::create(), SearchEngine::getSearchTypes() and SearchEngine::getNearMatch(), methods deprecated in 1.27, have been removed.
  • FileRepo::streamFile(), deprecated in 1.26, has been removed.
  • User::randomPassword() method, deprecated in 1.27, have been removed.
  • MWNamespace::canTalk(), deprecated in 1.30, have been removed.
  • Parser class property $mUniqPrefix, deprecated in 1.26, has been removed.
  • wfArrayFilter() and wfArrayFilterByKey(), deprecated in 1.32, have been removed.
  • wfMakeUrlIndexes() function, deprecated in 1.33, have been removed.
  • Method signatures in WatchedItemQueryServiceExtension have changed from taking User objects to taking UserIdentity objects. Extensions implementing this interface need to be changed accordingly.
  • User::getGroupPage() and ::makeGroupLinkHTML(), deprecated in 1.29, have been removed. Use UserGroupMembership::getGroupPage and ::getLink instead.
  • User::makeGroupLinkWiki(), deprecated in 1.29, has been removed. Use UserGroupMembership::getLink() instead.
  • SavepointPostgres, deprecated in 1.31, has been removed.
  • OutputPage::enableSectionEditLinks(), OutputPage::sectionEditLinksEnabled(), ParserOptions::getEditSection(), ParserOptions::setEditSection(), and ParserOutput::getEditSectionTokens, ::getTOCEnabled, ::setEditSectionTokens, and ::setTOCEnabled, deprecated in 1.31, have been removed.
  • EditPage::safeUnicodeInput() and ::safeUnicodeOutput(), deprecated in 1.30, have been removed.
  • Four methods in OutputPage, deprecated in 1.32, have been removed. You should use OutputPage::showFatalError or throw a FatalError instead. The methods are ::showFileCopyError(), ::showFileRenameError(), ::showFileDeleteError(), and ::showFileNotFoundError().
  • ApiBase::truncateArray(), deprecated in 1.32, has been removed.
  • IcuCollation::getICUVersion(), deprecated in 1.32, has been removed. Use PHP's INTL_ICU_VERSION constant directly.
  • HTMLForm::setSubmitProgressive(), deprecated in 1.32, has been removed.
  • ResourceLoaderStartUpModules::getStartupModules() and ::getLegacyModules(), both deprecated in 1.32, have been removed.
  • BaseTemplate::msgHtml() and QuickTemplate::msgHtml(), deprecated in 1.32, have been removed. Use ->msg() or ->getMsg() instead.
  • WatchAction::getUnwatchToken(), deprecated in 1.32, has been removed. Instead, use WatchAction::getWatchToken() with action 'unwatch' directly.
  • Language::initEncoding(), ::recodeForEdit(), and recodeInput(), deprecated in 1.28, have been removed.
  • PageArchive::getTextFromRow(), ::listAllPages(), and ::getLastRevisionText(), deprecated in 1.32, have been removed.
  • OutputPage::getModuleScripts(), ParserOutput::getModuleScripts(), deprecated in 1.33, have been removed.
  • User::getPasswordValidity(), deprecated in 1.33, has been removed.
  • ApiQueryBase::prepareUrlQuerySearchString(), deprecated in 1.33, has been removed.
  • ChangeTags::purgeTagUsageCache(), deprecated in 1.33, has been removed.
  • JobQueueGroup::pushLazyJobs(), deprecated in 1.33, has been removed.
  • MediaWikiTestCase::stashMwGlobals(), deprecated in 1.32, has been removed.
  • SearchEngine::transformSearchTerm(), deprecated in 1.32, has been removed.
  • The Block typehint only refers to blocks stored in the database. It should be updated to AbstractBlock in cases where any type of block could be expected.
  • FileRepoStatus, deprecated in 1.25, has been removed.
  • The LegacyHookPreAuthenticationProvider class, deprecated since its creation in 1.27, has been removed.
  • IP::isValidBlock(), deprecated in 1.30, has been removed.
  • WikiPage::prepareContentForEdit now doesn't accept an integer for $revision, was deprecated in 1.25.
  • The jquery.byteLength module, deprecated in 1.31, was removed. Use the mediawiki.String module instead.
  • mw.language.specialCharacters, deprecated in 1.33, has been removed. Use require( 'mediawiki.language.specialCharacters' ) instead.
  • The jquery.colorUtil module was removed. Use jquery.color instead.
  • The jquery.checkboxShiftClick module was removed. The functionality is provided by instead (task T232688).
  • The 'jquery.accessKeyLabel' module has been removed. This jQuery plugin now ships as part of the 'mediawiki.util' module bundle.
  • EditPage::submit(), deprecated in 1.29, has been removed. Use $this->edit() directly.
  • HTMLForm::getErrors(), deprecated in 1.28, has been removed. Use getErrorsOrWarnings() instead.
  • SpecialPage::getTitle(), deprecated in 1.23, has been removed. Use SpecialPage::getPageTitle() instead.
  • jquery.ui.effect-bounce, jquery.ui.effect-explode, jquery.ui.effect-fold jquery.ui.effect-pulsate, jquery.ui.effect-slide, jquery.ui.effect-transfer, which are no longer used, have now been removed.
  • SpecialEmailUser::validateTarget(), ::getTarget() without a sender/user specified, deprecated in 1.30, have been removed.
  • BufferingStatsdDataFactory::getBuffer(), deprecated in 1.30, has been removed.
  • The constant DB_SLAVE, deprecated in 1.28, has been removed. Use DB_REPLICA.
  • The constants NS_IMAGE and NS_IMAGE_TALK, deprecated in 1.14, have been removed. Use NS_FILE and NS_FILE_TALK respectively.
  • Replacer, DoubleReplacer, HashtableReplacer and RegexlikeReplacer (deprecated in 1.32) have been removed. Closures should be used instead.
  • OutputPage::addWikiText(), ::addWikiTextWithTitle(), ::addWikiTextTitleTidy(), ::addWikiTextTidy(), ::addWikiTextTitle(), deprecated in 1.32, have been removed.
  • The $wgUseKeyHeader configuration option and the OutputPage::getKeyHeader() method, deprecated in 1.32, have been removed.
  • WebInstallerOutput::addWikiText(), deprecated in 1.32, has been removed.
  • Parser::fetchFile(), deprecated in 1.32, has been removed. Use the method Parser::fetchFileAndTitle() instead.
  • The global function wfBCP47, deprecated in 1.31, has been removed.
  • wfCountDown() function, deprecated in 1.31, has been removed. Use \Maintenance::countDown() method instead.
  • OutputPage::wrapWikiMsg() no longer accepts an options parameter. This was deprecated since 1.20.
  • Skin::outputPage() no longer accepts a context. This was deprecated in 1.20.
  • Linker::link() no longer accepts a string for the query array, as was deprecated in 1.20.
  • PrefixSearch::titleSearch(), deprecated in 1.23, has been removed. Use the SearchEngine::defaultPrefixSearch or ::completionSearch() methods instead.
  • The UserRights hook, deprecated in 1.26, has been removed. Instead, use the UserGroupsChanged hook.
  • Skin::getDefaultInstance(), deprecated in 1.27, has been removed. Get the instance from MediaWikiServices instead.
  • The UserLoadFromSession hook, deprecated in 1.27, has been removed.
  • The wfResetSessionID global function, deprecated in 1.27, has been removed. Use MediaWiki\Session\SessionManager instead.
  • The wfGetLBFactory global function, deprecated in 1.27, has been removed. Use MediaWikiServices::getInstance()->getDBLoadBalancerFactory().
  • The internal method OutputPage->addScriptFile() will no longer silently drop calls that use an invalid path (i.e., something other than an absolute path, protocol-relative URL, or full scheme URL), and will instead pass them to the client where they will likely 404. This usage was deprecated in 1.24.
  • Database::reportConnectionError, deprecated in 1.32, has been removed.
  • APIEditBeforeSave hook, deprecated in 1.28, has been removed. Please see EditFilterMergedContent hook for an alternative way to use this feature.
  • API module methods getDescription(), getParamDescription(), & getExamples(), all deprecated in 1.25 and ignored, have been removed.
  • The API module method getDescriptionMessage(), deprecated in 1.30, has been removed.
  • The JavaScript global variable wgLoadScript has been removed. Use mw.util.wikiScript( 'load' ) instead.
  • ResourceLoader no longer creates the 'mw.legacy' placeholder object. It has been unused since 1.16 and was deprecated in 1.22. To deprecate a property in JavaScript, use mw.log.deprecate() instead.
  • The 'user.groups' module, deprecated in 1.28, was removed. Use the 'user' module instead.
  • The ResourceLoaderContext::expandModuleNames method, deprecated in 1.33, was removed. Use ResourceLoader::expandModuleNames instead.
  • The ability to override User::$mRights has been removed. Use PermissionManager::addTemporaryUserRights() instead.
  • Previously, when iterating ResultWrapper with foreach() or a similar construct, the range of the index was 1..numRows. This has been fixed to be 0..(numRows-1).
  • The ChangePasswordForm hook, deprecated in 1.27, has been removed. Use the AuthChangeFormFields hook or security levels instead.
  • WikiMap::getWikiIdFromDomain(), deprecated in 1.33, has been removed. Use WikiMap::getWikiIdFromDbDomain() instead.
  • The config variables $wgHtml5 , $wgJsMimeType , and $wgXhtmlDefaultNamespace , which were deprecated and ignored by core since 1.22, are no longer set to any value, and SkinTemplate no longer emits a 'jsmimetype' key. Any extensions not updated since 2013 to cope with this deprecation may now break.
  • (task T222637) Passing ResourceLoaderModule objects to ResourceLoader::register() or $wgResourceModules is no longer supported. Use the 'class' or 'factory' option of the array format instead.
  • The parameter $lang of the functions generateTOC and tocList in Linker and DummyLinker must be in type Language when present. Other types are deprecated since 1.33.
  • The static properties mw.Api.errors and mw.Api.warnings, deprecated in 1.29, have been removed.
  • ParserOption::getSpeculativeRevIdCallback(), deprecated in 1.28, has been removed.
  • The UploadVerification hook, deprecated in 1.28, has been removed. Instead, use the UploadVerifyFile hook.
  • UploadBase:: and UploadFromChunks::stashFileGetKey() and stashSession(), deprecated in 1.28, have been removed. Instead, please use the getFileKey() method on the response from doStashFile().
  • LBFactory::setDomainPrefix() and LoadBalancer::setDomainPrefix(), deprecated in 1.33, have been removed. Use setLocalDomainPrefix() instead.
  • IDatabase::implicitGroupby(), deprecated in 1.30, has been removed.
  • IDatabase::doneWrites(), deprecated in 1.31, has been removed. Use IDatabase::lastDoneWrites() instead.
  • Database::reportConnectionError(), deprecated in 1.32, has been removed.
  • LoadBalancer::laggedSlaveUsed(), deprecated in 1.28, has been removed. Use LoadBalancer::laggedReplicaUsed() instead.
  • Database::getProperty(), deprecated in 1.28, has been removed.
  • IDatabase::getWikiId(), deprecated in 1.30, has been removed. Use IDatabase::getDomainID() instead.
  • (task T191231) Support for using Oracle or MSSQL as database backends has been dropped.
  • MessageCache::destroyInstance() has been removed. Instead, call MediaWikiTestCase::resetServices().
  • SearchResult protected field $searchEngine is removed and no longer initialized after calling SearchResult::initFromTitle().
  • The UserIsBlockedFrom hook is only called if a block is found first, and should only be used to unblock a blocked user.
  • Parameters for index.php from PATH_INFO, such as the title, are no longer written to $_GET.
  • The selectFields() methods on classes LocalFile, ArchivedFile, OldLocalFile, DatabaseBlock, and RecentChange, deprecated in 1.31, have been removed. Use the corresponding getQueryInfo() methods instead.
  • The following methods on Revision, deprecated since 1.31, have been removed. Use RevisionStore::getQueryInfo() or RevisionStore::getArchiveQueryInfo() instead.
    • Revision::userJoinCond()
    • Revision::pageJoinCond()
    • Revision::selectFields()
    • Revision::selectArchiveFields()
    • Revision::selectTextFields()
    • Revision::selectPageFields()
    • Revision::selectUserFields()
  • User::setNewpassword(), deprecated in 1.27 has been removed.
  • The ObjectCache::getMainWANInstance and ObjectCache::getMainStashInstance functions, deprecated since 1.28, have been removed.
  • Language::$dataCache has been removed (without prior deprecation, for practical reasons). Use MediaWikiServices instead to get a LocalisationCache.

Deprecations in 1.34

  • The MWNamespace class is deprecated. Use NamespaceInfo.
  • ExtensionRegistry->load() is deprecated, as it breaks dependency checking. Instead, use ->queue().
  • User::isBlocked() is deprecated since it does not tell you if the user is blocked from editing a particular page. Use User::getBlock() or PermissionManager::isBlockedFrom() or PermissionManager::userCan() instead.
  • User::isLocallyBlockedProxy and User::inDnsBlacklist are deprecated and moved to the BlockManager as private helper methods.
  • User::isDnsBlacklisted is deprecated. Use BlockManager::isDnsBlacklisted instead.
  • The Config argument to ChangesListSpecialPage::checkStructuredFilterUiEnabled is deprecated. Pass only the User argument.
  • WatchedItem::getUser is deprecated. Use getUserIdentity.
  • Passing a Title as the first parameter to the getTimestampById method of RevisionStore is deprecated. Omit it, passing only the remaining parameters.
  • Title::getPreviousRevisionId and Title::getNextRevisionId are deprecated. Use RevisionLookup::getPreviousRevision and RevisionLookup::getNextRevision.
  • The Title parameter to RevisionLookup::getPreviousRevision and RevisionLookup::getNextRevision is deprecated and should be omitted.
  • MWHttpRequest::factory is deprecated. Use HttpRequestFactory.
  • The Http class is deprecated. For the request, get, and post methods, use HttpRequestFactory. For isValidURI, use MWHttpRequest::isValidURI. For getProxy, use (string)$wgHTTPProxy. For createMultiClient, construct a MultiHttpClient directly.
  • Http::$httpEngine is deprecated and has no replacement. The default 'guzzle' engine will eventually be made the only engine for HTTP requests.
  • RepoGroup::singleton(), RepoGroup::destroySingleton(), RepoGroup::setSingleton(), wfFindFile(), and wfLocalFile() are all deprecated. Use MediaWikiServices instead.
  • The getSubjectPage, getTalkPage, and getOtherPage of Title are deprecated. Use NamespaceInfo's getSubjectPage, getTalkPage, and getAssociatedPage.
  • MWMessagePack class, no longer used, has been deprecated in 1.34.
  • The Block class is separated into DatabaseBlock (for blocks stored in the database), and SystemBlock (for temporary blocks created by the system). SystemBlock should be used when creating any temporary blocks. Block is a deprecated alias for DatabaseBlock.
  • Parser::$mConf is deprecated. It will be removed entirely in a later version. Some context can be found at T224165.
  • Constructing Parser directly is deprecated. Obtain one from ParserFactory.
  • Title::moveSubpages is deprecated. Use MovePage::moveSubpages or MovePage::moveSubpagesIfAllowed.
  • The MWNamespace class is deprecated. Use MediaWikiServices::getNamespaceInfo.
  • (task T62260) Hard deprecate Language::getExtraUserToggles() method.
  • Language::viewPrevNext function is deprecated, use PrevNextNavigationRenderer::buildPrevNextNavigation instead
  • User::trackBlockWithCookie and DatabaseBlock::clearCookie are deprecated. Use BlockManager::trackBlockWithCookie and BlockManager::clearCookie instead.
  • DatabaseBlock::setCookie, DatabaseBlock::getCookieValue, DatabaseBlock::getIdFromCookieValue and AbstractBlock::shouldTrackWithCookie are moved to internal helper methods for BlockManager::trackBlockWithCookie.
  • ResourceLoaderContext::getConfig and ResourceLoaderContext::getLogger have been deprecated. Inside ResourceLoaderModule subclasses, use the local methods instead. Elsewhere, use the methods from the ResourceLoader class.
  • The Profiler::setTemplated and Profiler::getTemplated methods have been deprecated. Use Profiler::setAllowOutput and Profiler::getAllowOutput instead.
  • The Preprocessor_DOM implementation has been deprecated. It will be removed in a future release. Use the Preprocessor_Hash implementation instead.
  • Sanitizer::attributeWhitelist() and Sanitizer::setupAttributeWhitelist() have been deprecated; they will be made private in the future.
  • SearchResult::termMatches() method is deprecated. It was unreliable because only populated by few search engine implementations. Use SqlSearchResult::getTermMatches() if really needed.
  • SearchResult::getTextSnippet( $terms ) the $terms param is being deprecated and should no longer be passed. Search engine implemenations should be responsible for carrying relevant information needed for highlighting with their own SearchResultSet/SearchResult sub-classes.
  • SearchResultSet::free() method is deprecated.
  • SearchEngine::$searchTerms protected field is deprecated. Moved to SearchDatabase.
  • The use of the $terms param in the ShowSearchHit and ShowSearchHitTitle hooks is highly discouraged as it's only populated by SearchDatabase search engines.
  • Skin::escapeSearchLink() is deprecated. Use Skin::getSearchLink() or the skin template option 'searchaction' instead.
  • Skin::getRevisionId() and Skin::isRevisionCurrent() have been deprecated. Use OutputPage::getRevisionId() and OutputPage::isRevisionCurrent() instead.
  • LoadBalancer::haveIndex() and LoadBalancer::isNonZeroLoad() have been deprecated.
  • FileBackend::getWikiId() has been deprecated. Use FileBackend::getDomainId() instead.
  • User::getRights() and User::$mRights have been deprecated. Use PermissionManager::getUserPermissions() instead.
  • The LocalisationCacheRecache hook no longer allows purging of message blobs to be prevented. Modifying the $purgeBlobs parameter now has no effect.
  • SVGMetadataExtractor::getMetadata has been deprecated. Instead, you should use SVGReader->getMetadata() directly.
  • The following public properties on AbstractBlock are deprecated: $mReason, $mTimestamp, $mExpiry, $mHideName. Use the getters/setters instead.
  • The following public properties on DatabaseBlock are deprecated: $mAuto, $mParentBlockId. To check for an autoblock use DatabaseBlock::getType; to check for the parent ID, use DatabaseBlock::getParentBlockId.
  • SearchEngine::userHighlightPrefs() is deprecated, simply stop passing $contextlines and $contextchars to the SearchHighlighter methods, they will use proper defaults defined in SearchHighlighter::DEFAULT_CONTEXT_LINES and SearchHighlighter::DEFAULT_CONTEXT_CHARS.
  • SearchUpdate constructor: passing a string as the title param and or a boolean or a string as the content will produce a deprecation warning.
  • SearchEngine::getTextFromContent() is deprecated, use getTextForSearchIndex() directly from the Content object.
  • SearchEngine::textAlreadyUpdatedForIndex() is deprecated, given the deprecation above this method is no longer needed/called and should not be implemented by SearchEngine implementation.
  • IDatabase::bufferResults() has been deprecated. Use query batching instead.
  • MessageCache::singleton() is deprecated. Use MediaWikiServices::getMessageCache().
  • ObjectCache::getWANInstance() is deprecated. Use MediaWikiServices::getMainWANObjectCache() instead.
  • ObjectCache::newWANCacheFromParams() is deprecated. Use MediaWikiServices::getMainWANObjectCache() instead.
  • Constructing MovePage directly is deprecated. Use MovePageFactory.
  • TempFSFile::factory() has been deprecated. Use TempFSFileFactory instead.
  • wfIsBadImage() is deprecated. Use the BadFileLookup service instead.
  • Building a new SearchResult is hard-deprecated, always call SearchResult::newFromTitle(). This class is being refactored into an abstract class. If you extend this class please be sure to override all its methods or extend RevisionSearchResult.
  • Skin::getSkinNameMessages() is deprecated and no longer used.
  • The mediawiki.RegExp module is deprecated; use mw.util.escapeRegExp() instead.
  • Specifying a SpecialPage object for the list of special pages (either through the SpecialPage_initList hook or by adding to $wgSpecialPages ) is now deprecated.
  • WebInstaller::getInfoBox(), getWarningBox() and getErrorBox() are deprecated. Use Html::errorBox() or Html::warningBox() instead.
  • Use of ActorMigration with archive.ar_user, image.img_user, oldimage.oi_user, filearchive.fa_user, recentchanges.rc_user, logging.log_user, and ipblocks.ipb_by is deprecated. Queries should be adjusted to use the corresponding actor fields directly. Note that use with revision.rev_user is *not* deprecated at this time.
  • Specifying both the class and factory parameters for ApiModuleManager::addModule is now deprecated. The ObjectFactory spec should be used instead.
  • The UserIsHidden hook is deprecated. Use GetUserBlock instead, and add a system block that hides the user.
  • The GetBlockedStatus hook is deprecated. Use GetUserBlock instead, to add or remove a block.
  • $wgContentHandlerUseDB is deprecated and should always be true.
  • StreamFile::send404Message() and StreamFile::parseRange() are now deprecated. Use HTTPFileStreamer::send404Message() and HTTPFileStreamer::parseRange() respectively instead.
  • Global variable $wgSysopEmailBans is deprecated; to allow sysops to ban users from sending emails, use
$wgGroupPermissions['sysop']['blockemail'] = true;
  • ApiQueryBase::showHiddenUsersAddBlockInfo() is deprecated. Use ApiQueryBlockInfoTrait instead.
  • PasswordReset is now a service, its direct instantiation is deprecated.
  • RESTBagOStuff users should specify either "JSON" or "PHP" serialization type.
  • The global function wfIsHHVM() is deprecated and will now always return false regardless of the runtime environment. This is part of the continuing work to remove HHVM support from MediaWiki, which started in MediaWiki 1.31.
  • Language::getLocalisationCache() is deprecated. Use MediaWikiServices instead.
  • The following Language methods are deprecated: isSupportedLanguage, isValidCode, isValidBuiltInCode, isKnownLanguageTag, fetchLanguageNames, fetchLanguageName, getFileName, getMessagesFileName, getJsonMessagesFileName. Use the new LanguageNameUtils class instead. (Note that fetchLanguageName(s) are called getLanguageName(s) in the new class.)

Other changes in 1.34

  • Added option to specify "Various authors" as author in extension credits using "..." as the only author name. If the "author" array contains more than one entry and "..." is one of the entries in the array, "..." will be parsed as "others" (version-poweredby-others i18n message) like previously.



MediaWiki 1.34 requires PHP 7.2.9 or later (including PHP 7.3). The following PHP extensions also need to be installed and enabled:

  • ctype
  • dom
  • fileinfo
  • iconv
  • json
  • mbstring
  • xml

As stated earlier, MediaWiki 1.34 no longer supports HHVM.

MediaWiki recommends using the MySQL or MariaDB DBMS. MediaWiki can also use PostgreSQL or SQLite databases, but support for them may be limited because many MediaWiki users choose MySQL or MariaDB.

The supported versions are:

  • MySQL 5.5.8 or later
  • PostgreSQL 9.2 or later
  • SQLite 3.8.0 or later

Online documentation


Documentation for both end-users and site administrators is available on, and is covered under the GNU Free Documentation License (except for pages that explicitly state that their contents are in the public domain):

Mailing list


A mailing list is available for MediaWiki user support and discussion: A low-traffic announcements-only list is also available: It's highly recommended that you sign up for one of these lists if you're going to run a public MediaWiki, so you can be notified of security fixes.

IRC help


There's usually someone online in the IRC channel #mediawiki connect.