* $wgRateLimitLog was removed; use $wgDebugLogGroups['ratelimit'] instead.
* Deprecated API formats dbg, txt, and yaml have been removed.
* CLDRPluralRule* classes have been replaced with wikimedia/cldr-plural-rule-parser.
+* Removed $wgProfilePerHost, $wgUDPProfilerHost, $wgUDPProfilerPort,
+ $wgUDPProfilerFormatString, $wgStatsMethod, $wgAggregateStatsID, $wgStatsFormatString,
+ and $wgProfileCallTree (deprecated since 1.20).
+* For proper operation of LocalIdLookup with shared user tables, ensure that
+ $wgSharedDB and $wgSharedTables are properly set even on the "central" wiki
+ that all others are sharing from and that $wgLocalDatabases is set to the
+ full list of sharing wikis on all those wikis.
=== New features in 1.27 ===
* $wgDataCenterId and $wgDataCenterRoles where added, which will serve as
* Added CentralIdLookup, a service that allows extensions needing a concept of
"central" users to get that without having to know about specific central
authentication extensions.
+* $wgMaxUserDBWriteDuration added to limit huge user-generated transactions.
+ Regular web request transactions that takes longer than this are aborted.
+* Added a new hook, 'TitleMoveCompleting', which runs before a page move is committed.
+* $wgCdnReboundPurgeDelay was added to provide secondary delayed purges of URLs
+ from CDN to mitigate DB replication lag and WAN cache purge lag.
=== External library changes in 1.27 ===
==== Upgraded external libraries ====
the text before diffing it.
* Deprecated formats dbg, txt, and yaml have been removed.
* (T47988) The protect log event details now use new-style formatting.
+* The following response properties from action=login are deprecated, and may
+ be removed in the future: lgtoken, cookieprefix, sessionid. Clients should
+ handle cookies to properly manage session state.
=== Action API internal changes in 1.27 ===
* ApiQueryORM removed.
** ApiFormatDbg
** ApiFormatTxt
** ApiFormatYaml
-* ApiQueryBase::getDirectionDescription is now marked as deprecated. It should
- have been so marked since 1.25 when ApiBase::getParamDescription was
- deprecated, but was overlooked at the time.
+* ApiQueryBase::titleToKey(), ApiQueryBase::keyToTitle() and
+ ApiQueryBase::keyPartToTitle() all removed (deprecated since 1.24).
+* ApiQueryBase::checkRowCount() was removed (deprecated since 1.24).
+* ApiQueryBase::getDirectionDescription() was removed (deprecated since 1.25).
+* ApiQuery::getModules() was removed (deprecated since 1.21).
+* ApiMain::getModules() was removed (deprecated since 1.21).
=== Languages updated in 1.27 ===
* ResourceLoader::getLessCompiler() now takes an optional parameter of
additional LESS variables to set for the compiler.
* wfBaseConvert() marked as deprecated, use Wikimedia\base_convert() directly instead.
+* Obsolete maintenance scripts clearCacheStats.php and showCacheStats.php
+ were removed. The underlying data is sent to StatsD (see $wgStatsdServer).
+* Removed msg_resource_links database table and associated code.
+* Removed msg_resource database table and associated code.
+* Skin::getNamespaceNotice() was removed.
+* wfIsConfiguredProxy() was removed (deprecated since 1.24).
+* wfDebugTimer() was removed (deprecated since 1.25).
+* wfIsTrustedProxy() was removed (deprecated since 1.24).
+* wfGetIP() was removed (deprecated since 1.19).
+* MWHookException was removed.
+* OutputPage::appendSubtitle() was removed (deprecated since 1.19).
+* OutputPage::loginToUse() was removed (deprecated since 1.19).
+* Article::loadContent() was removed (deprecated since 1.19).
+* User::editToken() was removed (deprecated since 1.19).
+* Removed --force-normal option of dumpBackup.php, as it no longer served
+ any useful purpose since 1.22.
+* The functions processOption() and processArgs() on the BackupDumper and
+ TextPassDumper classes have been removed.
+* The maintenance/backupTextPass.inc file was deleted. You should include
+ maintenance/dumpTextPass.php instead.
+* WikiPage::getUsedTemplates() was removed (deprecated since 1.19).
+* wfEmptyMsg() was removed (deprecated since 1.18).
+* OutputPage::permissionRequired() was removed (deprecated since 1.18).
+* OutputPage::blockedPage() was removed (deprecated since 1.18).
+* User::getSkin() was removed (deprecated since 1.18).
+* OutputPage::includeJQuery() was removed (deprecated since 1.17).
+* WikiPage::updateRestrictions() was removed (deprecated since 1.19).
+* WikiPage::testPreSaveTransform() was removed (deprecated since 1.19).
+* LogPage::logName() was removed (deprecated since 1.19).
+* LogPage::logHeader() was removed (deprecated since 1.19).
+* wfCheckLimits() was removed (deprecated since 1.24).
+* Linker::makeKnownLinkObj() was removed (deprecated since 1.16).
+* Linker::makeLinkObj() was removed (deprecated since 1.16).
+* wfMsgForContentNoTrans() was removed (deprecated since 1.18).
+* ChangesList::usePatrol was removed (deprecated since 1.22).
+* wfMsgNoTrans() was removed (deprecated since 1.18).
+* Linker::makeImageLink2 was removed (deprecated since 1.20).
+* Title::userIsWatching() was removed (deprecated since 1.20).
+* Removed WaitForSlave maintenance script; use SELECT MASTER_POS_WAIT()
+ database function directly instead.
+* wfMsg() was removed (deprecated since 1.18).
+* wfMsgForContent() was removed (deprecated since 1.18).
+* wfMsgReal() was removed (deprecated since 1.18).
+* wfMsgGetKey() was removed (deprecated since 1.18).
+* wfMsgHtml() was removed (deprecated since 1.18).
+* wfMsgWikiHtml() was removed (deprecated since 1.18).
+* wfMsgExt() was removed (deprecated since 1.18).
== Compatibility ==