=== PHP version requirement ===
As of 1.27, MediaWiki now requires PHP 5.5.9 or higher. This corresponds with
-HHVM 3.1.
+HHVM 3.1. Additionally, the following PHP extensions are required:
+* ctype
+* iconv
+* json
+* mbstring
+* xml
=== Configuration changes in 1.27 ===
* $wgAllowMicrodataAttributes and $wgAllowRdfaAttributes were removed,
and error messages. It is available client-side via mw.config.get( 'wgRequestId' ).
The request ID supplants exception IDs. Accordingly, MWExceptionHandler::getLogId()
is deprecated.
+* (T33313) Add a preference for watching uploads by default, also applies
+ to API-based upload tools.
=== External library changes in 1.27 ===