maintenance/cleanupUsersWithNoId.php.
* $wgResourceLoaderMinifierStatementsOnOwnLine and $wgResourceLoaderMinifierMaxLineLength
were removed (deprecated since 1.27).
+* (T180921) $wgReferrerPolicy now supports having fallbacks for browsers that are not
+ using the latest version of the Referrer Policy specification.
=== New features in 1.31 ===
* Wikimedia\Rdbms\IDatabase->select() and similar methods now support
=== External library changes in 1.31 ===
==== Upgraded external libraries ====
+* Updated jquery.chosen from v0.9.14 to v1.8.2.
* …
==== New external libraries ====
has been deprecated since 1.27 and was removed as well.
== Compatibility ==
-MediaWiki 1.31 requires PHP 5.5.9 or later. There is experimental support for
-HHVM 3.6.5 or later.
+MediaWiki 1.31 requires PHP 5.5.9 or later. Although HHVM 3.18.5 or later is supported,
+it is generally advised to use PHP 5.5.9 or later for long term support.
MySQL/MariaDB is the recommended DBMS. PostgreSQL or SQLite can also be used,
but support for them is somewhat less mature. There is experimental support for