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.
+* Wikis that contain imported revisions or CentralAuth global blocks should run
+ maintenance/cleanupUsersWithNoId.php.
=== New features in 1.31 ===
* Wikimedia\Rdbms\IDatabase->select() and similar methods now support
* As a first pass in standardizing dialog boxes across the MediaWiki product,
Html class now provides helper methods for messageBox, successBox, errorBox and
warningBox generation.
+* (T9240) Imports will now record unknown (and, optionally, known) usernames in
+ a format like "iw>Example".
+* (T20209) Linker (used on history pages, log pages, and so on) will display
+ usernames formed like "iw>Example" as interwiki links, as if by wikitext like
+ [[iw:User:Example|iw>Example]].
+* (T111605) The 'ImportHandleUnknownUser' hook allows extensions to auto-create
+ users during an import.
=== External library changes in 1.31 ===
* Revision::setUserIdAndName() was deprecated.
* Access to TitleValue class properties was deprecated, the relevant getters
should be used instead.
+* DifferenceEngine::getDiffBodyCacheKey() is deprecated. Subclasses should
+ override DifferenceEngine::getDiffBodyCacheKeyParams() instead.
+* The deprecated MW_DIFF_VERSION constant was removed.
+ DifferenceEngine::MW_DIFF_VERSION should be used instead.
+* Use of Maintenance::error( $err, $die ) to exit script was deprecated. Use
+ Maintenance::fatalError() instead.
+* Passing a ParserOptions object to OutputPage::parserOptions() is deprecated.
+* Browser support for Opera 12 and older was removed.
+ Opera 15+ continues at Grade A support.
+* The Block class will no longer accept usable-but-missing usernames for
+ 'byText' or ->setBlocker(). Callers should either ensure the blocker exists
+ locally or use a new interwiki-format username like "iw>Example".
== Compatibility ==
MediaWiki 1.31 requires PHP 5.5.9 or later. There is experimental support for