HHVM 3.1.
=== Configuration changes in 1.27 ===
+* $wgAllowMicrodataAttributes and $wgAllowRdfaAttributes were removed,
+ now always enabled. If you use RDFa on your wiki, you now have to explicitly
+ set $wgHtml5Version to 'HTML+RDFa 1.0' or 'XHTML+RDFa 1.0'.
* $wgUseLinkNamespaceDBFields was removed.
* Deprecated $wgResourceLoaderMinifierStatementsOnOwnLine and
$wgResourceLoaderMinifierMaxLineLength, because there was little value in
* $wgEnotifUseJobQ was removed and the job queue is always used.
* The functionality of the ApiSandbox extension has been merged into core. The
extension should no longer be used.
+* $wgPreloadJavaScriptMwUtil was removed (deprecated in 1.26).
+ Extensions, skins, gadgets and scripts that use the mediawiki.util module must
+ express a dependency on it.
+* $wgIncludeLegacyJavaScript, deprecated in MediaWiki 1.26, now defaults false.
+ Extensions, skins, gadgets and scripts that need the mediawiki.legacy.wikibits
+ module should express a dependency on it.
=== New features in 1.27 ===
* $wgDataCenterUpdateStickTTL was also added. This decides how long a user
be a good idea, but will log out all current sessions.
* $wgEventRelayerConfig was added, for managing PubSub event relay configuration,
specifically for reliable CDN url purges.
+* Requests have unique IDs, equal to the UNIQUE_ID environment variable (when
+ MediaWiki is behind Apache+mod_unique_id or something similar) or a randomly-
+ generated 24-character string. This request ID is used to annotate log records
+ and error messages. It is available client-side via mw.config.get( 'wgRequestId' ).
+ The request ID supplants exception IDs. Accordingly, MWExceptionHandler::getLogId()
+ is deprecated.
=== External library changes in 1.27 ===
==== Upgraded external libraries ====
* Updated oojs/oojs-ui from v0.12.12 to v0.13.3.
* Updated composer/semver from v1.0.0 to v1.2.0.
-* Update liuggio/statsd-php-client to 1.0.18.
+* Updated liuggio/statsd-php-client to 1.0.18.
+* Updated QUnit from v1.18.0 to v1.22.0.
==== New external libraries ====
* Added wikimedia/base-convert v1.0.1.
** ApiFormatDbg
** ApiFormatTxt
** ApiFormatYaml
+* ApiBase::addTokenProperties() was removed (deprecated since 1.24).
+* ApiBase::getFinalPossibleErrors() was removed (deprecated since 1.24).
+* ApiBase::getFinalResultProperties() was removed (deprecated since 1.24).
+* ApiBase::getRequireAtLeastOneParameterErrorMessages() was removed (deprecated since 1.24).
+* ApiBase::getPossibleErrors() was removed (deprecated since 1.24).
+* ApiBase::getRequireMaxOneParameterErrorMessages() was removed (deprecated since 1.24).
+* ApiBase::getRequireOnlyOneParameterErrorMessages() was removed (deprecated since 1.24).
+* ApiBase::getResultProperties() was removed (deprecated since 1.24).
+* ApiBase::getTitleOrPageIdErrorMessage() was removed (deprecated since 1.24).
+* ApiBase::parseErrors() was removed (deprecated since 1.24).
* ApiQueryBase::titleToKey(), ApiQueryBase::keyToTitle() and
ApiQueryBase::keyPartToTitle() all removed (deprecated since 1.24).
* ApiQueryBase::checkRowCount() was removed (deprecated since 1.24).
* Language::getLanguageNames() was removed (deprecated since 1.20).
* Language::getTranslatedLanguageNames() was removed (deprecated since 1.20).
* Language::specialPage() was removed (deprecated since 1.24).
+* MediaWikiTestCase::assertException() was removed (deprecated since 1.22).
+* OutputPage::getHeadItems() was removed (deprecated since 1.24).
+* OutputPage::getScript() was removed (deprecated since 1.24).
+* OutputPage::out() was removed (deprecated since 1.22).
+* OutputPage::setAllowedModules() was removed (deprecated since 1.24).
=== Languages updated in 1.27 ===
** WatchedItem::duplicateEntries was deprecated.
** EmailNotification::updateWatchlistTimestamp was deprecated.
** User::getWatchedItem was removed.
+* Unit tests don't work with external PHPUnit anymore, Composer is now the only supported
+ way. Run `composer install` to install it and other dev dependencies to run unit tests.
+* wl_id field added to the watchlist table.
== Compatibility ==