production.
=== PHP version requirement ===
-As of 1.27, MediaWiki now requires PHP 5.5.9 or higher. This corresponds with
-HHVM 3.1. Additionally, the following PHP extensions are required:
+As of 1.27, MediaWiki now requires PHP 5.5.9 or higher (see Compatibility
+section). Additionally, the following PHP extensions are required:
* ctype
* iconv
* json
-* mbstring
+* mbstring (new requirement in 1.27)
* xml
The following PHP extensions are strongly recommended:
* openssl
=== Bug fixes in 1.27 ===
* Special:Upload will now display correct maximum allowed file size when running
under HHVM (T116347).
+* (T54077) The APIEditBeforeSave hook will once again give only the content of
+ the section being edited, rather than the whole revision. This reverts the
+ change made in MediaWiki 1.22.
=== Action API changes in 1.27 ===
* Added list=allrevisions.
* User::isPasswordReminderThrottled() was deprecated.
* Bot-oriented parameters to Special:UserLogin (wpCookieCheck, wpSkipCookieCheck)
were removed.
+* Installer can now be customized without patching MediaWiki code, see
+ mw-config/overrides/README for details.
== Compatibility ==