essential.
* $wgUsejQueryThree was removed, as it is now the default. This was documented as a
temporary variable during the migration period, deprecated since 1.29.
+* $wgLogoHD has been updated to support svg images and uses $wgLogo where
+ possible for fallback images such as png.
+* (T44246) $wgFilterLogTypes will no longer ignore 'patrol' when user does
+ not have the right to mark things patrolled.
* …
=== New features in 1.31 ===
* The OutputPage class constructor now requires a context parameter,
(instantiating without context was deprecated in 1.18)
* mw.page (deprecated in 1.30) was removed.
+* Article::getLastPurgeTimestamp(), WikiPage::getLastPurgeTimestamp(), and the
+ related WikiPage::PURGE_* constants, deprecated in 1.29, were removed.
+* The Article::selectFields(), Article::onArticleCreate(),
+ Article::onArticleDelete(), and Article::onArticleEdit() methods, deprecated
+ in 1.24, were removed.
+* Installer::locateExecutable() and Installer::locateExecutableInDefaultPaths()
+ were removed, use ExecutableFinder::findInDefaultPaths() instead.
+* Several methods for returning lists of fields to select from the database
+ have been deprecated in favor of similar methods that also return the tables
+ to select from and the join conditions for those tables.
+ * Block::selectFields() → Block::getQueryInfo()
+ * RecentChange::selectFields() → RecentChange::getQueryInfo()
+ * ArchivedFile::selectFields() → ArchivedFile::getQueryInfo()
+ * LocalFile::selectFields() → LocalFile::getQueryInfo()
+ * LocalFile::getCacheFields() with a prefix no longer works
+ * LocalFile::getLazyCacheFields() with a prefix no longer works
+ * OldLocalFile::selectFields() → OldLocalFile::getQueryInfo()
+ * RecentChange::selectFields() → RecentChange::getQueryInfo()
+ * Revision::userJoinCond() → Revision::getQueryInfo( [ 'user' ] )
+ * Revision::selectUserFields() → Revision::getQueryInfo( [ 'user' ] )
+ * Revision::pageJoinCond() → Revision::getQueryInfo( [ 'page' ] )
+ * Revision::selectPageFields() → Revision::getQueryInfo( [ 'page' ] )
+ * Revision::selectTextFields() → Revision::getQueryInfo( [ 'text' ] )
+ * Revision::selectFields() → Revision::getQueryInfo()
+ * Revision::selectArchiveFields() → Revision::getArchiveQueryInfo()
+ * User::selectFields() → User::getQueryInfo()
+ * WikiPage::selectFields() → WikiPage::getQueryInfo()
+* Due to significant refactoring, method ContribsPager::getUserCond() that had
+ no access restriction has been removed.
== Compatibility ==
MediaWiki 1.31 requires PHP 5.5.9 or later. There is experimental support for