= MediaWiki 1.43 =

== MediaWiki 1.43.0-PRERELEASE ==

THIS IS NOT A RELEASE YET

MediaWiki 1.43 is an alpha-quality development branch, and is not recommended
for use in production.

== Upgrading notes for 1.43 ==
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 1.43 upgrades are below:

* It is now necessary that the OpenSSL PHP extension is installed.
* …

For notes on 1.42.x and older releases, see HISTORY.

=== Configuration changes for system administrators in 1.43 ===

* $wgBlockTargetMigrationStage, which was introduced in 1.42, is now deprecated
  and has no effect.
* …

==== New configuration ====

* (T13555) $wgParserEnableLegacyHeadingDOM - Defaults to `true`, can be set to
  `false` to enable new, more accessible HTML markup for wikitext headings.
  Note that each skin must also use the 'supportsMwHeading' option to allow it.
  More information: https://www.mediawiki.org/wiki/Heading_HTML_changes
  In a future release the new markup will become the default,
  and later this option will be removed.
* …

==== Changed configuration ====

* wgPageLinksSchemaMigrationStage – (T299947) This temporary setting, which
  controls the database schema migration for the page links table, is now set
  by default to write to both old and new data and read from the new data.
* The "error-json" channel, configurable via $wgDebugLogGroups, has been
  removed. For structured logging, use the "error" channel directly instead.
  Since MediaWiki 1.25, structured logging is supported via Monolog for all
  channels, including the "error" channel. For silenced errors, you use the
  "silenced-error" channel added in MediaWiki 1.42. (T193472)
* …

==== Removed configuration ====

* wgSessionInsecureSecrets has been removed since OpenSSL is now a required
  PHP extension.
* …

=== New user-facing features in 1.43 ===

* (T338341) Support reading XMP and EXIF from WebP files
* (T242346) Special:TalkPage is a new special page that will redirect to the
  associated talk namespace page, e.g. [[Special:TalkPage/Foo]] redirects to
  [[Talk:Foo]]; [[Special:TalkPage/Project:Foo]] goes to [[Project talk:Foo]].
  This allows for links by templates and tools without having to parse what
  namespaces are valid and have associated talk pages.
* …

=== New features for sysadmins in 1.43 ===

* …

=== New developer features in 1.43 ===

* StatusValue class gained new method getMessages(): MessageSpecifier[],
  allowing the errors to be inspected and displayed more easily, for example:
    foreach ( $status->getMessages() as $msg ) {
      if ( $msg->getKey() !== 'ignored-message' ) {
        $this->getOutput()->addWikiMsg( $msg );
      }
    }
* The REST API framework now supports defining redirects in route definition
  files. See MediaWiki\Rest\Handler\RedirectHandler for details.
* (T13555) Skins can enable the 'supportsMwHeading' option for new, more
  accessible HTML markup for wikitext headings. MediaWiki's own styles and
  scripts have been updated to support it, but your skin may also need updates.
  More information: https://www.mediawiki.org/wiki/Heading_HTML_changes
  A future release will emit deprecation warnings for skins with
  'supportsMwHeading' set to false.
* (T219397) New `Language::formatDurationBetweenTimestamps()` function added
  which takes two timestamps and a precision in order to calculate a more
  accurate text representation of duration.
* …

=== External library changes in 1.43 ===

* The OOjs Router library has been merged into core and will be archived
  upstream.

==== New external libraries ====

* …

===== New development-only external libraries =====

* …

==== Changed external libraries ====
* Updated codex, codex-design-tokens and codex-icons
  from v1.3.6 to v1.6.0.
* Updated guzzlehttp/guzzle from 7.7.1 to 7.8.1.
* Updated pear/net_smtp from 1.11.1 to 1.12.1.
* Updated monolog/monolog from 2.9.2 to 2.9.3.
* Updated symfony/yaml from 5.4.35 to 5.4.39.
* Updated OOUI from v0.49.1 to v0.49.2.
* …

===== Changed development-only external libraries =====

* Upgraded eslint-config-wikimedia from 0.26.0 to 0.27.0.
* Updated seld/jsonlint from 1.10.1 to 1.10.2.
* Updated doctrine/dbal from 3.7.2 to 3.8.4.
* Updated phpunit/phpunit from 9.6.16 to 9.6.19.
* …

==== Removed external libraries ====

* …

=== Bug fixes in 1.43 ===

* …

=== Action API changes in 1.43 ===

* APIQueryUserInfo now returns null in the field registrationdate for users
  created before December 2005 (their registration date was not recorded).
* …

=== Action API internal changes in 1.43 ===

* …

=== Languages updated in 1.43 ===
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.

* (T290657) Added language support for Levantine Arabic (apc).
* (T364291) Added language support for Musi, also known as Palembang (mui).
* (T365365) Added language support for Chakma (ccp).
* …

=== Breaking changes in 1.43 ===

* ErrorPageError public properties 'msg' and 'title' may now contain
  any MessageSpecifier object, not just Message.
* Reset button functionality suppressReset() and $mShowReset from HTMLForm
  was removed without replacement.
* UserGroupMembership::getGroupName(), deprecated in 1.38, and
  UserGroupMembership::getGroupMemberName(), deprecated in 1.40, have
  been removed.
* SerializedValueContainer::isUnified(), deprecated in 1.42, has been
  removed.
* Parser::getFreshParser(), deprecated in 1.39, has been removed.
* ConfigFactory::getDefaultInstance(), deprecated since 1.27, has been
  removed.
* IReadableDatabase::getReplicaPos() has been removed without deprecation
  as it's not used anywhere.
* ILoadBalancer::laggedReplicaUsed() has been moved to ILoadBalancerForOwner::
  effectively making it internal.
* Overriding MWException::getHTML(), ::getText(), ::getPageTitle(), and
  ::reportHTML() in order to display custom exception messages is no
  longer supported.
* In PageHandlerTestTrait, the newRouter() method was renamed to
  newRouterForPageHandler() to avoid a conflict with a method of the same
  name in RestTestTrait. Also, PageHandlerTestTrait is no longer marked as
  "stable to use". It was marked this way by accident, the functionality it
  provides is specific to certain handlers implemented in MediaWiki core.
* TablePager::getBody(), final and deprecated since 1.24, has been removed.
  Use ::getBodyOutput() or ::getFullOutput() instead.
* ImportableUploadRevisionImporter::downloadSource(), deprecated in 1.31, is now
  private. Its only known external caller was removed in 1.40.
* The following methods in the User class have been removed:
  * Deprecated in 1.33:
    * User::isBlockedFrom()
  * Deprecated in 1.34:
    * User::isBlocked()
  * Deprecated in 1.35:
    * User::addGroup()
    * User::getAllGroups()
    * User::getGroups()
    * User::getGroupMemberships()
    * User::getImplicitGroups()
    * User::getOption()
    * User::removeGroup()
  * Deprecated in 1.37:
    * User::isBlockedFromCreateAccount()
* BotPassword::invalidateAllPasswordsForCentralId() and
  BotPassword::removeAllPasswordsForCentralId(), deprecated in 1.37,
  have been removed.
* Title::getBrokenLinksFrom(), deprecated in 1.42, has been removed.
* The $type parameter to Skin::getCopyright(), deprecated in 1.40, has been
  removed.
* Skin::footerLink(), deprecated in 1.40, has been removed.
* Skin::getAction(), deprecated in 1.39, has been removed.
* Title::getCdnUrls() and Title::purgeSquid(), deprecated in 1.35, have been
  removed.
* Constructing MWHttpRequest objects now requires timeout and connectTimeout to
  be set; this was deprecated in 1.35.
* Hooks that were run from SpecialContributions are now run from the parent,
  ContributionsSpecialPage. The page passed in is a ContributionsSpecialPage
  type, and documentation and type comparisons may need to be updated. Affected
  hooks are: ContributionsBeforeMainOutputHook, ContributionsToolLinksHook,
  SpecialContributions__getForm__filtersHook.
* Hooks that were run from ContribsPager are now run from the parent,
  ContributionsPager. If a pager is passed in, it is a ContributionsPager type,
  and documentation and type comparisons may need to be updated. Affected
  hooks are: ContribsPager__reallyDoQueryHook, ContribsPager__getQueryInfoHook,
  ContributionsLineEndingHook, SpecialContributions__formatRow__flagsHook.
* DatabaseBlock::purgeExpired, deprecated since 1.38, has been removed.
* AbstractBlock::getPermissionsError, deprecated since 1.35, has been removed.
* IDatabase::namedLocksEnqueue() has been removed without deprecation.
* IDatabase::getTopologyBasedServerId() has been removed without deprecation.
  Use IDatabase::getServerName() instead.
* WikiPage::doDeleteArticleBatched, hard deprecated since 1.37, has been
  removed.
* SpecialEmailUser::submit, deprecated since 1.41, has been removed.
* SpecialEmailUser::validateTarget, deprecated since 1.41, has been removed.
* SpecialEmailUser::getPermissionsError, deprecated since 1.41 has been
  removed.
* SpecialBlock::getTargetAndType, deprecated since 1.36, has been removed.
* ApiQueryBlockInfoTrait::addBlockInfoToQuery(), deprecated since 1.42, has been
  removed.
* Linker::makeHeadline(), Linker::generateTOC(), Linker::tocIndent(),
  Linker::tocUnindent(), Linker::tocLine(), Linker::tocLineEnd(), and
  Linker::tocList(), deprecated in 1.42, have been removed.
* Linker::formatComment(), Linker::formatLinksInComment(),
  Linker::commentBlock(), and Linker::revComment(), deprecated in 1.38,
  have been removed.
* DummyLinker has been removed. The former DummyLinker parameter
  to the 'ImageBeforeProduceHTML' hook is now null.
* IMaintainableDatabase::listViews(), deprecated since 1.42, has been removed.
* …

=== Deprecations in 1.43 ===

* The methods StatusValue::getErrors() and StatusValue::getErrorsByType(),
  as well as Status::getErrorsArray() and Status::getWarningsArray(), have
  been deprecated in favor of new method StatusValue::getMessages().
* (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 69% in MediaWiki 1.42.0). The following have newly
  been moved:
  - MediaWiki\Content:
    - CssContent
    - CssContentHandler
    - FallbackContent
    - FallbackContentHandler
    - JavaScriptContent
    - JavaScriptContentHandler
    - JsonContent
    - JsonContentHandler
    - TextContent
    - TextContentHandler
  - MediaWiki\Debug:
    - DeprecationHelper
    - MWDebug
  - MediaWiki\Deferred:
    - RefreshSecondaryDataUpdate
  - MediaWiki\FileBackend:
    - FileBackendGroup – FIXME: Should this be in Wikimedia\FileBackend instead?
  - MediaWiki\Json:
    - FormatJson
  - MediaWiki\RCFeed:
    - FormattedRCFeed
    - IRCColourfulRCFeedFormatter
    - JSONRCFeedFormatter
    - MachineReadableRCFeedFormatter
    - RCFeed
    - RCFeedFormatter
    - RedisPubSubFeedEngine
    - UDPRCFeedEngine
    - XMLRCFeedFormatter
  - MediaWiki\RenameUser:
    - RenameUserJob
  - MediaWiki\RevisionList:
    - RevisionItem
    - RevisionItemBase
    - RevisionList
    - RevisionListBase
  - MediaWiki\Watchlist:
    - ActivityUpdateJob
    - ClearUserWatchlistJob
    - ClearWatchlistNotificationsJob
    - NoWriteWatchedItemStore
    - WatchedItem
    - WatchedItemQueryService
    - WatchedItemQueryServiceExtension
    - WatchedItemStore
    - WatchedItemStoreInterface
    - WatchlistExpiryJob
  - MediaWiki\Xml:
    - Xml
    - XmlSelect
  - Wikimedia\FileBackend:
    - FileBackend
  - Wikimedia\Http:
    - MultiHttpClient
* MessageCache::get() with $language other than Language or null is
  deprecated and emits deprecation warnings. For high-level access,
  use wfMessage() or RequestContext::msg() instead.
* SearchEngineConfig::getConfig() has been deprecated, use DI with
  ServiceOptions to inject the required options.
* ObjectCache::isDatabaseId() and ::getLocalClusterInstance() have been
  deprecated. Use their equivalents in ObjectCacheFactory.
* Using the "post" source in parameter declarations returned from
  Handler::getParamSettings() is deprecated, use "body" instead.
* IMaintainableDatabase::textFieldSize() is now deprecated.
* ISQLPlatform::tableNamesN() is now deprecated.
* The implementation in SQLPlatform of ISQLPlatform::tableNames(), deprecated in
  MediaWiki 1.39, now emits deprecation warnings.
* The following methods, previously deprecated, now emit deprecation warnings:
  - ContentHandler::getDefaultModelFor(), deprecated since 1.33
  - ContentHandler::getAllContentFormats(), deprecated since 1.35
  - ContentHandler::getContentModels(), deprecated since 1.35
  - ContentHandler::getForContent(), deprecated since 1.35
  - ContentHandler::getForModelID(), deprecated since 1.35
  - ContentHandler::getContentText(), deprecated since 1.37
* OutputPage::showFatalError() is deprecated, use showErrorPage() instead.
* LoadBalancer::getConnectionRef(), deprecated since 1.39, now emits deprecation
  warnings. Use ::getConnection() instead.
* DBAccessObjectUtils::getDBOptions() is deprecated, use
  SelectQueryBuilder::recency() instead.
* IDatabase::lockForUpdate is deprecated, use
  SelectQueryBuilder::acquireRowLocks instead.
* wfGetUrlUtils() is deprecated; instead, get a UrlUtils from services.
* DerivedPageDataUpdater::getPreparedEdit(), provided for back-compatibility, is
  now deprecated; use the getters directly, instead.
* AuthManager::forcePrimaryAuthenticationProviders(), provided for back-
  compatibility, is now deprecated.
* WikiPage::hasDifferencesOutsideMainSlot(), provided as a stop-gap before
  refactoring to support MCR, is now deprecated.
* ChangesList::getTimestamp() has been deprecated; use ::revDateLink() instead.
* SiteConfig::variants() has been deprecated; use ::variantsFor().
* ObjectCache::$instances and ::getInstance() have been deprecated; instead, use
  ObjectCacheFactory::getInstance().
* ApiTestCase::setExpectedApiException() has been deprecated; instead, use
  ::expectApiErrorCode() to test error codes instead of messages.
* User::isBlockedGlobally(), deprecated since 1.40, now emits deprecation
  warnings.
* User::isBlockedFromEmailuser() and User::canSendEmail(), deprecated since
  1.41, now emit deprecation warnings.
* StatusValue will emit deprecation warnings when an error is given as
  a MessageSpecifier combined with a parameters array, which is usually
  a mistake, as the parameters have always been ignored.
* In StatusValue::replaceMessage(), ::hasMessage() and ::hasMessagesExcept()
  passing MessageSpecifier or MessageValue as $source has been deprecated.
* DatabaseBlock::getQueryInfo() and DatabaseBlock::getRangeCond() are
  deprecated and emit deprecation warnings. Use the equivalent methods in
  DatabaseBlockStore.
* DatabaseBlockStore::getReadStage() and ::getWriteStage() are deprecated.
  Use the new schema unconditionally.
* …

=== Other changes in 1.43 ===

* Class aliases to support the old PHPUnit 4 style un-namespaced `PHPUnit_`
  classes (such as PHPUnit_Framework_Error) have been removed.
* [Temporary accounts] If $wgAutoCreateTempUser is enabled, then MediaWiki
  will create a temporary account and log the user in for unsuccessful edit
  attempts and null edits, in addition to edits that change content. This is
  a change from the previous paradigm, where temporary accounts were created
  only for successful edits. This change is done to support better logging
  support and moderation, to ensure that hooks run in a pre-save context have
  a user object to associate log entries and other actions with.
* Several entries have been removed from the default list of interwikis used
  when installing new wikis. This does not affect existing wikis.
* User auto-creations are now performed as the target user instead of
  anonymous IP user.
* Corrected the interpretation of empty arrays in extension configuration when
  the default value is null. Previously, an empty array specified by the
  administrator would transform into the default null value. It now
  appropriately retains its empty array state.
* …

== Compatibility ==

MediaWiki 1.43 requires PHP 8.1.0 or later and the following PHP extensions:

* ctype
* dom
* fileinfo
* iconv
* intl
* json
* mbstring
* openssl
* xml

MariaDB is the recommended database software. MySQL, PostgreSQL, or SQLite can
be used instead, but support for them is somewhat less mature.

The supported versions are:

* MariaDB 10.3 or higher
* MySQL 5.7.0 or higher
* PostgreSQL 10 or later
* SQLite 3.8.0 or later

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

  <https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation>

== Mailing list ==
A mailing list is available for MediaWiki user support and discussion:

  <https://lists.wikimedia.org/postorius/lists/mediawiki-l.lists.wikimedia.org/>

A low-traffic announcements-only list is also available:

  <https://lists.wikimedia.org/postorius/lists/mediawiki-announce.lists.wikimedia.org/>

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 #mediawiki on irc.libera.chat.