Release notes/1.42

From mediawiki.org

MediaWiki 1.42[edit]

MediaWiki 1.42.0-PRERELEASE[edit]

THIS IS NOT A RELEASE YET

MediaWiki 1.42 is a pre-release testing branch, and is not recommended for use in production.

Upgrading notes for 1.42[edit]

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

See the file UPGRADE for more detailed per-version upgrade instructions from the oldest supported upgrading version, MediaWiki 1.35.

Some specific notes for MediaWiki 1.42 upgrades are below:

  • MediaWiki now requires Composer 2.x, and any related (vendor) files generated
 by Composer must be generated by Composer 2.x. Composer 1.x is mostly end of
 life by upstream, and using it will result in slower actions when downloading
 and installing packages. See the upstream blog post at
 https://blog.packagist.com/deprecating-composer-1-support/ for further
 information.

For notes on 1.41.x and older releases, see HISTORY.

Configuration changes for system administrators in 1.42[edit]

  • Composer 1.x is no longer supported, and can no longer be used with MediaWiki.

New configuration[edit]

  • $wgMicroStashType: The object cache backend for the MicroStash service.
  • $wgEditRecoveryExpiry: Number of seconds to keep edit recovery data
 after the edit is stored.
  • $wgDjvuUseBoxedCommand and $wgDjvuShell: A temporary flag to control whether
 or not to use BoxedCommand when wrapping DejaVu rendering, and the command to
 call if so.
  • $wgConditionalUserOptions: Makes it possible to define user properties with
 defaults varying by user, without growing the user_properties table. Typical
 use-case is to enable a feature only for users created after a certain date.
  • $wgGrantRiskGroups: Grant risk levels, used to indicate on various UIs which
 grants should be considered risky. (T290790)
  • $wgTempAccountCreationThrottle: Like AccountCreationThrottle, but for managing
 temporary account creations.

Changed configuration[edit]

  • $wgAutoCreateTempUser: 'matchPattern' now supports multiple match patterns.
  • $wgLogActionsHandlers is now ObjectFactory compatible.
  • $wgBotPasswordsCluster and $wgBotPasswordsDatabase have been deprecated
 use $wgVirtualDomainsMapping['virtual-botpasswords'] instead.
  • The MainPageIsDomainRoot setting is no longer considered experimental.
  • $wgAutoCreateTempUser is updated to use a different format for temporary
 accounts. This configuration value is marked as unstable, so breaking
 changes were expected. If your wiki used temporary accounts before
 1.42, you will need to override the configuration value to also match
 the old format of *$1.

Removed configuration[edit]

  • $wgDisableCookieCheck has been removed.
  • $wgStatsCacheType has been removed. Set $wgMicroStashType instead.
  • $wgJobSerialCommitThreshold has been removed without deprecation,
 it wasn't used anywhere according to codesearch and any setups using this
 config will perform just fine but might be less performant.
  • $wgLogoHD, deprecated since 1.35, has been removed. Use $wgLogo instead.
  • $wgContentHandlerTextFallback, deprecated since 1.37, has been removed.
 No longer customizable.
  • $wgSquidPurgeUseHostHeader, deprecated since 1.33, has been removed.
 No longer customizable and always true.
  • $wgAllowImageTag, deprecated since 1.35, has been removed.
 Register an extension tag named <img> instead.
  • $wgMinimalPasswordLength and $wgMaximalPasswordLength, deprecated since 1.26
 have been dropped. Use $wgPasswordPolicy instead.
  • $wgUseMediaWikiUIEverywhere has been removed.
  • $wgHTMLFormAllowTableFormat has been removed.
  • $wgOpenSearchTemplate, deprecated since 1.25, has been removed
 Use $wgOpenSearchTemplates['application/x-suggestions+json'] instead.
  • $wgUseSameSiteLegacyCookies has been removed.

New user-facing features in 1.42[edit]

  • (T308160) filter: is now allowed in inline CSS in wikitext

New developer features in 1.42[edit]

  • (T326466) MediaWikiIntegrationTestCase's database and set-up code now avoids
 using dynamic properties, which was causing deprecation warnings in PHP 8.2.
  • (T13555) MediaWiki now includes styles that allow more accessible markup for
 section headings. MediaWiki's own HTML output will be changed in the future.
 More information: https://www.mediawiki.org/wiki/Heading_HTML_changes
  • (T193472) PHP Notice and Warning errors that are silenced (e.g. by the "@"
 operator, error_reporting directive, or Wikimedia\AtEase) are now logged to
 a new "silenced-error" channel.
  • (T347347) The CLI installer accepts a "--with-developmentsettings" argument
 to require the DevelopmentSettings.php file at install time.
  • (T350054) MediaWiki's ResourceLoader has been updated to add basic support
 for code-splitting (aka "tree-shaking") when using the Codex component
 library. A ResourceLoader module can now specify a list of "codexComponents"
 in its module defintion and ensure that only the code for those components
 gets sent to the client. More information:
 https://www.mediawiki.org/wiki/Codex#Subset_of_components
  • (T345185) The SessionProviderInterface now allows defining providers that
 are exempt from rights checks when auto creating users.

External library changes in 1.42[edit]

New external libraries[edit]

  • Added mediawiki/json-codec at v2.2.1.
  • Added mck89/peast at v1.16.2.

Changed external libraries[edit]

  • Updated OOUI from v0.48.1 to v0.49.1.
  • Updated OOjs Router from 0.3.0 to 0.5.0.
  • Updated codex, codex-design-tokens and codex-icons
 from v1.0.0 to v1.3.6.
  • Updated Vue from v3.2.37-compat to v3.3.9.
  • Updated composer/semver from 3.3.2 to 3.4.0.
  • Updated guzzlehttp/guzzle from 7.5.3 to 7.7.1.
  • Updated monolog/monolog from 2.2.0 to 2.9.2.
  • Updated pear/mail from 1.5.1 to 1.6.0.
  • Updated pear/mail_mime from 1.10.11 to 1.10.12.
  • Updated pear/net_smtp from 1.10.1 to 1.11.1.
  • Updated psr/http-message from 1.0.1 to 1.1.
  • Updated symfony/polyfill-php80 from 1.28.0 to 1.29.0.
  • Updated symfony/polyfill-php81 from 1.28.0 to 1.29.0.
  • Updated symfony/polyfill-php82 from 1.28.0 to 1.29.0.
  • Updated symfony/polyfill-php83 from 1.28.0 to 1.29.0.
  • Updated symfony/yaml from 5.4.23 to 5.4.35.
  • Updated wikimedia/less.php from 4.1.1 to 4.2.1.
  • Updated wikimedia/remex-html from 4.0.1 to 4.1.0.
  • Updated wikimedia/minify from 2.5.1 to 2.7.0.
  • Updated wikimedia/relpath from 3.0.0 to 4.0.0.
  • Updated wikimedia/shellbox from 4.0.0 to 4.0.1.
Changed development-only external libraries[edit]
  • Updated QUnit from v2.19.4 to v2.20.0.
  • Updated composer/spdx-licenses from 1.5.7 to 1.5.8.
  • Updated doctrine/dbal from 3.4.2 to 3.7.2.
  • Updated doctrine/sql-formatter from 1.1.1 to 1.1.3.
  • Updated grunt-banana-checker from 0.11.0 to 0.11.1.
  • Updated mediawiki/mediawiki-codesniffer from 42.0.0 to 43.0.0.
  • Updated mediawiki/mediawiki-phan-config from 0.13.0 to 0.14.0.
  • Updated php-parallel-lint/php-parallel-lint from 1.3.2 to 1.4.0.
  • Updated phpunit/phpunit from 9.5.28 to 9.6.16.
  • Updated psy/psysh from ^0.11.1 to ^0.12.3.
  • Updated seld/jsonlint from 1.8.3 to 1.10.1.
  • Updated wikimedia/testing-access-wrapper from 2.0.0 to 3.0.0.

Action API changes in 1.42[edit]

  • APIQueryTags now includes "software" in the "source" array for software
 generated tags. Reliance on the "extension" entries in this array is now
 deprecated, but they will remain for backwards compatibility.

Languages updated in 1.42[edit]

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.

  • (T268143) Language variant conversion has been removed for Kazakh.
  • (T352776) Updated autonym spelling for the Mon language (mnw).
  • (T351874) Added language support for Komering (kge).
  • (T351992) Added language support for Efik (efi).
  • (T352954) Added language support for Rutul (rut).
  • (T353058) Added language support for Arbëresh (aae).
  • (T353307) Added language support for Guadeloupean Creole (gcf).
  • (T353500) Added language support for Southeastern Kolami (nit).
  • (T354519) Added language support for Tooro (ttj).
  • (T354926) Added language support for Nyoro (nyo).
  • (T356616) Added language support for Chinook Jargon (chn).
  • (T357879) Added language support for Ibibio (ibb).

Breaking changes in 1.42[edit]

  • (T340802) ResourceLoader: The targets system is no longer active; all modules
 will load on all platforms even if they are marked as desktop- or mobile-only
 in the 'targets' field, which is no longer read. As part of this, the internal
 methods RL\Module::setTarget() & ::getTargets(), and OutputPage::setTarget(),
 have been removed.
  • TitleArray, deprecated since 1.41, has been removed.
  • UserRightsProxy, deprecated since 1.38, has been removed.
  • SiteConfiguration::getConfig(), deprecated in 1.41, has been removed.
  • UserLoginCompleteHook is always called with its $direct parameter set to
 boolean true. The false case has been removed.
  • MagicWord::load() has been marked @internal and may change in the future
 without further notice.
  • All classes that implemented IDBAccessObject interface and all interfaces
 that extended it, no longer do that. See https://w.wiki/9DAX for more info.
  • BagOStuff::setNewPreparedValues() now emits deprecation warnings.
  • The type of the last parameter of BeforeInitializeHook::onBeforeInitialize
 and MediaWikiPerformActionHook::onMediaWikiPerformAction changed from
 MediaWiki to ActionEntryPoint. Relevant methods are still available on
 the object.
  • Classes that override Maintenance::finalSetup() must now declare the
 $settings parameter and pass it on when calling the parent implementation.
 MaintenanceRunner will always provide this parameter when calling
 finalSetup().
  • WebResponse::disableForPostSend() is no longer static.
  • MediaWiki's virtualrest internal library has been removed in favor of the
 HTTP library like: Guzzle, MultiHttpClient or MwHttpRequest.
  • Several deprecated methods have been removed from the Content interface,
 in favor of the respective methods in ContentHandlers. Callers should
 use a more narrow interface like ContentRenderer or ContentTransformer
 when possible. The following methods have been removed from Content:
 - getParserOutput()
 - preSaveTransform()
 - preloadTransform()
 - prepareSave()
  • User::blockedFor() and AbstractBlock::getReason(), deprecated in 1.35, have
 been removed. Use AbstractBlock::getReasonComment() instead.
  • SerializedValueContainer::newUnified(), deprecated in 1.41 has been removed.
  • Use of ActorMigration for any of the following tables, deprecated since 1.34,
 is no longer supported:
 - archive
 - image
 - oldimage
 - filearchive
 - recentchanges
 - logging
 - ipblocks
  • ParserOutput::setFlag() and ::getFlag(), deprecated in 1.38, were removed. You
 should use ::setOutputFlag() and ::getOutputFlag() instead.
  • ParserOutput::getCategories(), deprecated in 1.40, has been removed. You
 should use ::getCategoryNames() and ::getCategorySortKey() instead.
  • ParserOutput::getTOCHTML(), deprecated in 1.40, has been removed. You should
 use ::getTOCData() instead.
  • The parser does not substitute the default category sort key at
 parse time; this is substituted when the category links table is
 updated instead.  As a result Template:DEFAULTSORT will affect all the
 contents of the page (not just categories added after the location
 of Template:DEFAULTSORT in the article) and
 ParserOutput::getCategorySortKey() will return the empty string
 (still meaning "use the default sort key") instead of the immediate
 value of Template:DEFAULTSORT.  ParserOutput::getCategorySortKey() will
 directly reflect the category link contents, instead of having
 postprocessing done to it (character references decoded, newlines
 replaced, language conversion).  That postprocessing is now done
 when the category links table is updated, and so it consistently
 applies even when categories are added directly via API.
  • PostgresUpdater::addPgEnumValue() unused everywhere, have been removed
 without deprecation. Use of ENUM is highly discouraged.
  • ILoadBalancer::getAnyOpenConnection() has been removed without deprecation,
 use ::getConnection() instead.
  • The unused method CommentStore::getFields() has been removed without
 depreaction.
  • LanguageConverter's internal properties, all deprecated in 1.35 or 1.36, have
 now had their deprecated property accessors dropped:
 - mConvRuleTitle
 - mUserVariant
 - mHeaderVariant
 - mMaxDepth
 - mVarSeparatorPattern
 - mLangObj
 - mTablesLoaded
 - mTables
 - mVariants
 - mMainLanguageCode
 - mVariantFallbacks
 - mFlags
 - mVariantNames
 - mDescCodeSep
 - mDescVarSep
  • OutputPage::addParserOutputText has been marked @internal since there are no
 known users of it. Its old behavior has been deprecated and will change
 in the future without further notice.
  • A some methods of ConnectionManager and SessionConsistentConnectionManager,
 previously deprecated, have been removed:
 - ::releaseConnection(), deprecated in 1.38; do not use
 - ::getWriteConnectionRef(), deprecated in 1.39; use getWriteConnection()
 - ::getReadConnectionRef(), deprecated in 1.38; use getReadConnection()
 - ::getLazyWriteConnectionRef(), deprecated in 1.39; use getWriteConnection()
 - ::getLazyReadConnectionRef(), deprecated in 1.38; use getReadConnection()
  • CoreParserFunctions::mwnamespace(), deprecated in 1.39, has been removed. Use
 CoreParserFunctions::namespace() instead.
  • Processor:: and ExtensionProcessor::getExtraAutoloaderPaths(), deprecated in
 1.39, have been removed; use ::getExtractedAutoloadInfo() instead.
  • MWExceptionHandler::rollbackMasterChangesAndLog(), deprecated in 1.37, has
 been removed. Use ::rollbackPrimaryChangesAndLog() instead.
  • Passing a custom database connection to DatabaseBlockStore::insertBlock(),
 deprecated since 1.41, is no longer supported.
  • LanguageConverterFactory::isTitleConversionDisabled(), deprecated in 1.36,
 has been removed. Use ::isLinkConversionDisabled() instead.
  • MediaWikiIntegrationTestCase::$tablesUsed has been deprecated. The framework
 now detects these automatically.
  • Passing an actor id to the constructor of UserIdentityValue, deprecated
 since 1.36, is no longer being supported.
  • Support for setting dynamic property on StatusValue object has been removed.
 To pass your arbitrary data along the object, use StatusValue::statusData
 property (which is always declared).
  • The global function wfReportTime(), deprecated since 1.40, has been removed.
  • The skin template parameter 'reporttime', deprecated since 1.41, has been
 removed.
  • WikiPage::getPageIsRedirectField(), deprecated since 1.41, has been removed.
  • WikiPage::insertRedirect(), deprecated since 1.41, has been removed.
  • Several methods in PageArchive, all deprecated in 1.38, have been removed:
 - ::listRevisions()
 - ::getRevisionRecordByTimestamp()
 - ::getArchivedRevisionRecord()
 - ::getPreviousRevisionRecord()
 - ::getLastRevisionId()
 - ::isDeleted()
 - ::getFileStatus()
 - ::getRevisionStatus()
  • Database, DatabaseInstaller, DatabaseUpdater, DBPrimaryPos, ResultWrapper and
 SQLPlatform are no longer stable to extend. It is not possible to define
 database types in an extension.
  • UserDef::PARAM_ALLOWED_USER_TYPES now differentiates between temporary account
 usernames and user accounts. Any endpoints that want temp users to be
 valid but were passing a name through will break. Temp users must now be
 explicitly allowed.
  • The Hooks class, a legacy wrapper for HooksContainer, has been removed. All of
 its contents have been previously deprecated in 1.35 (or 1.41 for ::runner()):
 - ::register()
 - ::clear(),
 - ::isRegistered()
 - ::getHandlers()
 - ::run()
 - ::runWithoutAbort()
 - ::runner()
  • Article::__get(), ::__set(), deprecated since 1.35, have been removed.
  • Several API calls have been updated to return a 'temp' user flag:
 - ApiQueryImageInfo
 - ApiQueryLogEvents
 - ApiQueryRecentChanges
 - APIs extended from ApiQueryRevisionsBase
  • Parser::getCustomDefaultSort() and ::setDefaultSort(), deprecated since 1.38,
 have been removed.
  • UserOptionsLookup::getDefaultOptions() and
 UserOptionsLookup::getDefaultOption() now accept an UserIdentity, to
 take conditional defaults for user properties into account. When conditional
 defaults are used, calling those methods without the UserIdentity might
 produce unexpected results.
  • Installer related classes have been namespaced without having aliases added.
 The following have been moved to MediaWiki\Installer:
 - CliInstaller
 - DatabaseInstaller
 - InstallDocFormatter
 - Installer
 - InstallerOverrides
 - InstallerSessionProvider
 - LocalSettingsGenerator
 - MysqlInstaller
 - PostgresInstaller
 - PostgresUpdater
 - SqliteInstaller
 - SqliteUpdater
 - WebInstaller
 - WebInstallerComplete
 - WebInstallerCopying
 - WebInstallerDBConnect
 - WebInstallerDBSettings
 - WebInstallerDocument
 - WebInstallerExistingWikis
 - WebInstallerInstall
 - WebInstallerLanguage
 - WebInstallerName
 - WebInstallerOptions
 - WebInstallerOutput
 - WebInstallerPage
 - WebInstallerReleaseNotes
 - WebInstallerRestart
 - WebInstallerUpgrade
 - WebInstallerUpgradeDoc
 - WebInstallerWelcome
  • mediawiki.ui/variables.less, deprecated since 1.41, has been removed in
 favor of mediawiki.skin.variables.less.
  • The module `jquery.cookie` (deprecated as of 1.41) has been removed. Please
 use `mediawiki.cookie` instead
  • The no-op module `es6-polyfills` (deprecated as of 1.41) has been removed.
  • Log formatters (as defined in $wgLogActionsHandlers) are now created by
 ObjectFactory, which means their constructors must be public. Legacy log
 formatters using callbacks instead of class names are no longer supported.
  • The old aliases for the namespaced ResourceLoader classes, deprecated since
 they were moved in MediaWiki 1.39, have now been dropped:
 - ResourceLoader – use MediaWiki\ResourceLoader\ResourceLoader
 - ResourceLoaderCircularDependencyError
   – use MediaWiki\ResourceLoader\CircularDependencyError
 - ResourceLoaderClientHtml – use MediaWiki\ResourceLoader\ClientHtml
 - ResourceLoaderCodexModule – use MediaWiki\ResourceLoader\CodexModule
 - ResourceLoaderContext – use MediaWiki\ResourceLoader\Context
 - ResourceLoaderFileModule – use MediaWiki\ResourceLoader\FileModule
 - ResourceLoaderFilePath – use MediaWiki\ResourceLoader\FilePath
 - ResourceLoaderForeignApiModule
   – use MediaWiki\ResourceLoader\ForeignApiModule
 - ResourceLoaderImage – use MediaWiki\ResourceLoader\Image
 - ResourceLoaderImageModule – use MediaWiki\ResourceLoader\ImageModule
 - ResourceLoaderLessVarFileModule
   – use MediaWiki\ResourceLoader\LessVarFileModule
 - ResourceLoaderModule – use MediaWiki\ResourceLoader\Module
 - ResourceLoaderMwUrlModule – use MediaWiki\ResourceLoader\MwUrlModule
 - ResourceLoaderOOUIFileModule – use MediaWiki\ResourceLoader\OOUIFileModule
 - ResourceLoaderOOUIIconPackModule
   – use MediaWiki\ResourceLoader\OOUIIconPackModule
 - ResourceLoaderOOUIImageModule
   – use MediaWiki\ResourceLoader\OOUIImageModule
 - ResourceLoaderOOUIModule – use MediaWiki\ResourceLoader\OOUIModule
 - ResourceLoaderSiteModule – use MediaWiki\ResourceLoader\SiteModule
 - ResourceLoaderSiteStylesModule
   – use MediaWiki\ResourceLoader\SiteStylesModule
 - ResourceLoaderSkinModule – use MediaWiki\ResourceLoader\SkinModule
 - ResourceLoaderStartUpModule – use MediaWiki\ResourceLoader\StartUpModule
 - ResourceLoaderUserModule – use MediaWiki\ResourceLoader\UserModule
 - ResourceLoaderUserOptionsModule
   – use MediaWiki\ResourceLoader\UserOptionsModule
 - ResourceLoaderUserStylesModule
   – use MediaWiki\ResourceLoader\UserStylesModule
 - ResourceLoaderWikiModule – use MediaWiki\ResourceLoader\WikiModule
 - DerivativeResourceLoaderContext
   – use MediaWiki\ResourceLoader\DerivativeContext
 - MessageBlobStore – use MediaWiki\ResourceLoader\MessageBlobStore
 - VueComponentParser – use MediaWiki\ResourceLoader\VueComponentParser
  • (T318989) Skin::lastModified, deprecated since 1.40, has been removed.
  • Composer 1.x is no longer supported, and can no longer be used with MediaWiki.
  • Title::GAID_FOR_UPDATE, deprecated in 1.34, has been removed. Instead, your
 code should use IDBAccessObject::READ_LATEST.
  • Six private Title class members, deprecated in 1.37, are now fully private;
 use their corresponding accessor methods:
  - $mTextform   -> getText()
  - $mUrlform    -> getPartialURL()
  - $mDbkeyform  -> getDBkey()
  - $mNamespace  -> getNamespace()
  - $mInterwiki  -> getInterwiki()
  - $mFragment   -> getFragment()
  • Skin::bottomScripts, deprecated since 1.37, has been removed.
  • Fallback index and options have been removed from
 DBAccessObjectUtils::getDBOptions() without deprecation.
  • The deprecated class aliases for now-namespaced or renamed PHP classes that
 were added in or before 1.39 LTS have now been removed:
  - Blob -> Wikimedia\Rdbms\Blob
  - Block -> MediaWiki\Block\DatabaseBlock
  - DBAccessError -> Wikimedia\Rdbms\DBAccessError
  - DBConnectionError -> Wikimedia\Rdbms\DBConnectionError
  - DBError -> Wikimedia\Rdbms\DBError
  - DBExpectedError -> Wikimedia\Rdbms\DBExpectedError
  - DBQueryError -> Wikimedia\Rdbms\DBQueryError
  - DBReadOnlyError -> Wikimedia\Rdbms\DBReadOnlyError
  - DBReplicationWaitError -> Wikimedia\Rdbms\DBReplicationWaitError
  - DBTransactionError -> Wikimedia\Rdbms\DBTransactionError
  - DBTransactionSizeError -> Wikimedia\Rdbms\DBTransactionSizeError
  - DBUnexpectedError -> Wikimedia\Rdbms\DBUnexpectedError
  - DatabaseMysqlBase -> Wikimedia\Rdbms\DatabaseMySQL
  - DatabaseMysqli -> Wikimedia\Rdbms\DatabaseMySQL
  - EasyDeflate -> Deflate
  - Field -> Wikimedia\Rdbms\Field
  - IMaintainableDatabase -> Wikimedia\Rdbms\IMaintainableDatabase
  - LinksDeletionUpdate -> MediaWiki\Deferred\LinksUpdate\LinksDeletionUpdate
  - LinksUpdate -> MediaWiki\Deferred\LinksUpdate\LinksUpdate
  - LoadBalancer -> Wikimedia\Rdbms\LoadBalancer
  - LoadBalancerSingle -> Wikimedia\Rdbms\LoadBalancerSingle
  - RCFeedEngine -> FormattedRCFeed
  - RandomPage -> MediaWiki\Specials\SpecialRandomPage
  • The return value of IDatabase::upsert(), deprecated since 1.33, has been
 removed.
  • Instancing MediaWiki\Specials\SpecialRandomPage without injected services has
 been removed.
  • mediawiki.ui/utilities.less with its three layout CSS classes has been removed
  • SpecialPage::listed() and ::setListed(), deprecated since 1.35, have both been
 removed. Use ::isListed() to read, and over-ride by implementing isListed() or
 by sub-classing UnlistedSpecialPage.
  • BlockListPager::getTotalAutoblocks() was removed.

Deprecations in 1.42[edit]

  • (T273239) wfGetDB(), deprecated in 1.39, now emits deprecation warnings. Most
 code can migrate to MediaWikiServices::getInstance()->getConnectionProvider()
 ->getReplicaDatabase() or …->getPrimaryDatabase() as appropriate.
  • (T166010) All PHP code in MediaWiki is slowly being moved to be in a class
 namespace as appropriate, so that we can use PSR-4 auto-loading, which will
 speed up general code loading of MediaWiki. The old global namespace class
 names are being left behind as deprecated aliases.

 In this release of MediaWiki, XYZ classes now have a namespace and XYZ do
 not yet (XYZ% done, up from 63% in MediaWiki 1.41.0). The following have newly
 been moved:
 - MediaWiki\Cache:
   - BacklinkCache
   - FileCacheBase
   - GenderCache
   - HTMLCacheUpdater (and fix case for consistency with HTMLFileCache)
   - LinkBatch
   - LinkCache
   - UserCache
 - MediaWiki\Context:
   - ContextSource
   - DerivativeContextSource
   - IContextSource
   - MutableContext
   - RequestContext
 - MediaWiki\Deferred:
   - AtomicSectionUpdate
   - AutoCommitUpdate
   - CdnCacheUpdate
   - DataUpdate
   - DeferrableCallback
   - DeferrableUpdate
   - DeferredUpdates
   - DeferredUpdatesScope
   - DeferredUpdatesScopeMediaWikiStack
   - DeferredUpdatesScopeStack
   - EnqueueableDataUpdate
   - HtmlFileCacheUpdate
   - JobQueueEnqueueUpdate
   - MWCallableUpdate
   - MergeableUpdate
   - MessageCacheUpdate
   - SearchUpdate
   - SendPasswordResetEmailUpdate
   - SiteStatsUpdate
   - TransactionRoundAwareUpdate
   - TransactionRoundDefiningUpdate
   - UserEditCountInfo
   - UserEditCountUpdate
 - MediaWiki\HTMLForm:
   - CodexHTMLForm
   - CollapsibleFieldsetLayout
   - HTMLForm
   - HTMLFormActionFieldLayout
   - HTMLFormElement
   - HTMLFormField
   - HTMLFormFieldLayout
   - HTMLFormFieldRequiredOptionsException
   - HTMLNestedFilterable
   - OOUIHTMLForm
   - VFormHTMLForm
   - MediaWiki\HTMLForm\Field:
     - HTMLApiField
     - HTMLAutoCompleteSelectField
     - HTMLButtonField
     - HTMLCheckField
     - HTMLCheckMatrix
     - HTMLComboboxField
     - HTMLDateTimeField
     - HTMLEditTools
     - HTMLExpiryField
     - HTMLFileField
     - HTMLFloatField
     - HTMLFormFieldCloner
     - HTMLFormFieldWithButton
     - HTMLHiddenField
     - HTMLInfoField
     - HTMLIntField
     - HTMLMultiSelectField
     - HTMLNamespacesMultiselectField
     - HTMLRadioField
     - HTMLRestrictionsField
     - HTMLSelectAndOtherField
     - HTMLSelectField
     - HTMLSelectLanguageField
     - HTMLSelectLimitField
     - HTMLSelectNamespace
     - HTMLSelectNamespaceWithButton
     - HTMLSelectOrOtherField
     - HTMLSizeFilterField
     - HTMLSubmitField
     - HTMLTagFilter
     - HTMLTagMultiselectField
     - HTMLTextAreaField
     - HTMLTextField
     - HTMLTextFieldWithButton
     - HTMLTimezoneField
     - HTMLTitleTextField
     - HTMLTitlesMultiselectField
     - HTMLToggleSwitchField
     - HTMLUserTextField
     - HTMLUsersMultiselectField
 - MediaWiki\Installer:
   - DatabaseUpdater
   - MysqlUpdater
 - MediaWiki\LinkedData:
   - PageDataRequestHandler
 - MediaWiki\Maintenance:
   - Version
 - MediaWiki\Message:
   - Message
 - MediaWiki\Parser:
   - Parser
   - ParserOutput
 - MediaWiki\PoolCounter:
   - PoolCounter
   - PoolCounterNull
   - PoolCounterRedis
   - PoolCounterWork
   - PoolCounterWorkViaCallback
   - PoolWorkArticleView
   - PoolWorkArticleViewCurrent
   - PoolWorkArticleViewOld
 - MediaWiki\Site:
   - CachingSiteStore
   - DBSiteStore
   - HashSiteStore
   - MediaWikiSite
   - Site
   - SiteExporter
   - SiteImporter
   - SiteList
   - SiteLookup
   - SiteStore
 - (T352284) MediaWiki\User\Options:
   - DefaultOptionsLookup
   - UserOptionsLookup
   - UserOptionsManager
   - StaticUserOptionsLookup
  • Some hook classes have been moved from the generic MediaWiki\Hooks namespace
 to live closer to the code which uses them:
 - MediaWiki\Output\Hook:
   - AfterBuildFeedLinksHook
   - AfterFinalPageOutputHook
   - BeforePageDisplayHook
   - BeforePageRedirectHook
   - GetCacheVaryCookiesHook
   - LanguageLinksHook
   - MakeGlobalVariablesScriptHook
   - OutputPageAfterGetHeadLinksArrayHook
   - OutputPageBeforeHTMLHook
   - OutputPageBodyAttributesHook
   - OutputPageCheckLastModifiedHook
   - OutputPageMakeCategoryLinksHook
   - OutputPageParserOutputHook
  • API modules using ApiBase::requirePostedParameters() must also override
 mustBePosted() to return true.
  • Overriding MWException::getHTML(), ::getText(), ::getPageTitle(), and
 ::reportHTML() in order to display custom exception messages is now
 deprecated. Provide the error message when constructing the Exception,
 or if you need a whole custom error page, use ErrorPageError instead.
  • Using `new ImportReporter( … )` or `new ApiImportReporter( … )` without
 the $context parameter is now deprecated.
  • Using `WikiImporterFactory::getWikiImporter()` without the $performer
 parameter is now deprecated.
  • BlockManager::getUserBlock() was deprecated. Instead use
 BlockManager::getBlock(), which expects the caller to do ipblock-exempt
 checking.
  • The `composer phpunit:entrypoint` entrypoint has been deprecated, along with
 bootstrap.integration.php and suite.xml. Run tests with `composer phpunit`
 instead, or simply `vendor/bin/phpunit`, which use bootstrap.php and
 phpunit.xml.dist.
  • The global variable $wgCommandLineMode is deprecated. In most cases checks
 for `$wgCommandLineMode` can be replaced with `MW_ENTRY_POINT === 'cli'`.
  • The global function wfUnpack is deprecated and emits deprecation
 warnings. Use StringUtils::unpack instead.
  • SpecialEmailUser::getTarget() has been deprecated.
  • User::isBlocked(), ::isBlockedFromCreateAccount() and ::isBlockedFrom() now
 emit deprecation warnings. They were deprecated since 1.34, 1.37 and 1.33
 respectively.
  • DatabaseBlock::newFromID() was deprecated and will emit deprecation warnings.
 Instead use DatabaseBlockStore::newFromID().
  • DatabaseBlock::getAutoblockExpiry() was deprecated without replacement.
  • MagicWord::getId() has been deprecated.
  • MagicWordFactory::getSubstIDs() has been deprecated.
  • Status::setMessageLocalizer is deprecated. Callers that want to control the
 localization of the Status object should obtain a StatusFormatter from
 the StatusFormatterFactory.
  • Html::buttonAttributes() and Html::getTextInputAttributes() methods
 no longer do anything and have been deprecated.
  • DatabaseBlock::doAutoblock and ::updateTimestamp are now deprecated, use
 DatabaseBlockStore::doAutoblock and ::updateTimestamp instead.
  • The MediaWiki class has been deprecated. Type hints in hooks should be
 changed to refer to MediaWikiEntryPoint instead. Note that extensions should
 not define their own entry points and should not interfere with the state of
 MediaWikiEntryPoint instances.
  • Various methods in ObjectCache have been deprecated and their equivalent made
 available in ObjectCacheFactory, use them instead:
 - ::getInstance() -> ObjectCacheFactory::getInstance()
 - ::newFromParams() -> ObjectCacheFactory::newFromParams()
 - ::newAnything() -> ObjectCacheFactory::newInstance(
        ObjectCache::getAnythingId() )
 - ::getLocalServerInstance() -> ObjectCacheFactory::getLocalServerInstance()
 - ::clear() -> ObjectCacheFactory::clear()
 - In addition, the ObjectCache::$instances member has been deprecated as well.
  • Vuex has been deprecated in favor of its successor, Pinia. Though deprecated,
 Vuex 4 will remain accessible for the foreseeable future. Pinia should be used
 for new projects.
  • Linker::makeHeadline() has been deprecated.
  • SerializedValueContainer::isUnified() has been deprecated and now emits
 deprecation warnings since 1.42.
  • Linker::generateTOC(), Linker::tocIndent(), Linker::tocUnindent(),
 Linker::tocLine(), Linker::tocLineEnd(), Linker::tocList() are deprecated.
  • Title::getBrokenLinksFrom() has been deprecated.
  • LogFormatter subclasses now emit deprecation warnings unless they are
 constructed using LogFormatterFactory.
  • ReplicatedBagOStuff has been deprecated since 1.42.
  • The third argument to ContentRenderer::getParserOutput() now accepts a
 RevisionRecord or WikiRevision; passing an integer revision id has been
 deprecated and emits a warning.
  • Passing a null value to ParserOutput::setPageProperty() has been deprecated
 and emits a warning; pass an empty string or use `::unsetPageProperty()`
 instead.
  • Passing a non-string value to ParserOutput::setPageProperty() has been
 deprecated; use ::setNumericPageProperty() instead.
  • Passing a non-scalar value to ParserOutput::setPageProperty() will emit
 a warning (it has never worked).
  • ParserOutput::setLanguageLinks() has been deprecated.
  • ParserOutput::getTimestamp() and ::setTimestamp() have been deprecated; use
 ::getRevisionTimestamp() and ::setRevisionTimestamp() instead.
  • ParserOutput::setText() has been deprecated; use ::setRawText() instead which
 matches the name of the corresponding getter, ParserOutput::getRawText().
  • ParserOutput::addTemplate() will emit a deprecation warning if it is called
 with a non-local title, such as an interwiki link.  In a future release
 it will throw InvalidArgumentException.
  • The use of dynamic properties of Parser has been deprecated and will emit
 deprecation warnings.
  • The following deprecated public properties of Parser will emit deprecation
 warnings:
 - Parser::$ot, deprecated since 1.35
 - Parser::$mTitle, deprecated since 1.35
 - Parser::$mOptions, deprecated since 1.35
  • The following deprecated public properties of Parser are now marked
 for internal use only:
 - Parser::$mPPNodeCount, deprecated since 1.35
 - Parser::$mHighestExpansionDepth, deprecated since 1.35
  • ApiQueryBlockInfoTrait::addBlockInfoToQuery() will emit deprecation warnings
 and will soon stop working due to schema changes. Instead use
 addDeletedUserFilter() or getBlockDetailsForRows().
  • UploadBase::getImageInfo was deprecated, subclasses of ApiUpload can use
 ApiUpload::getUploadImageInfo() instead.
  • DatabaseBlockStore::updateTimestamp() is now internal and should not be
 called.
  • The LocalisationCache helper class GlobalDependency has been deprecated,
 use MainConfigDependency instead.
  • The module `mediawiki.icon` has been deprecated. Use the Codex mixin instead
 (T351681).
  • ConfigRepository::class and MediaWikiServices::getConfigRepository() have been
 deprecated, they are unused.
  • Passing a WikiPage to PageEditStash::parseAndCache() has been deprecated.
 Use PageUpdater instance.
  • SpecialBlock::getSuggestedDurations() has been deprecated, use
 Language::getBlockDurations() instead.
  • MediaWikiServices::getBlockErrorFormatter() has been deprecated, use
 MediaWikiServices::getFormatterFactory()->getBlockErrorFormatter() instead.
  • DummyLinker has been deprecated. The DummyLinker parameter to the
 'ImageBeforeProduceHTML' hook will become null in the future.
  • Database::listViews() has been deprecated. This was previously used to filter
 views out of the return value of Database::listTables(). Now listTables()
 will not include views. MediaWiki does not use views.
  • (T207621) UserMailer::rfc822Phrase() has been hard deprecated.
  • TempUserConfig::getMatchPattern has been deprecated, use
 TempUserConfig::getMatchPatterns instead.
  • (T230025) Title::purgeSquid(), deprecated in 1.35, now emits warnings.
  • Title::getCdnUrls(), deprecated in 1.35, now emits warnings.
  • The rarely-used convenience method Xml::wrapClass() is now deprecated. Instead
 you can use Xml::tags('span', ['class'=>'foo'], 'bar').
  • WebRequest::getCrossSiteCookie() has been deprecated due to the removal of
 $wgUseSameSiteLegacyCookies. It will emit deprecation warnings. Use
 WebRequest::getCookie().
  • Using the array_merge_recursive merge strategy in extension.json and skin.json
 has been hard deprecated.
  • DBAccessObjectUtils::getDBFromIndex() is now deprecated, use
 ::getDBFromRecency() instead.
  • Many Xml methods that are specific to HTML but not XML are deprecated:
 - Xml::buildForm
 - Xml::buildTable
 - Xml::buildTableRow
 - Xml::check
 - Xml::checkLabel
 - Xml::dateMenu
 - Xml::fieldset
 - Xml::input
 - Xml::inputLabel
 - Xml::inputLabelSep
 - Xml::label
 - Xml::languageSelector
 - Xml::listDropdown
 - Xml::listDropdownOptions
 - Xml::listDropdownOptionsOoui
 - Xml::monthSelector
 - Xml::option
 - Xml::password
 - Xml::radio
 - Xml::radioLabel
 - Xml::span
 - Xml::submitButton
 - Xml::textarea
 - Xml::attrib (only for use in HTML, not XML contexts)
  • IMaintainableDatabase::truncate() has been deprecated. Use truncateTable()
 instead.
  • TextConflictHelper->incrementStatsByUserEdits() is now deprecated. The
 action this function previously handled should be moved into
 incrementConflictStats() and incrementResolvedStats().
  • SQLPlatform::getQueryVerb() is now deprecated.

Other changes in 1.42[edit]

  • Gallery: Image captions are no longer wrapped in

    tags. Skins that

 customize rendering for galleries may need to tweak their CSS.
  • Scripts under maintenance/dev/, for quickly setup a local MediaWiki for
 development purposes, have been removed, see DEVELOPERS.md for alternatives.
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