* The driver 'mysql' for MySQL, deprecated in MediaWiki 1.30, has been removed.
The driver has been deprecated since PHP 5.5 and was removed in PHP 7.0. The
default driver for MySQL has been 'mysqli' since MediaWiki 1.22.
+* The following properties of PreparedEdit were deprecated in 1.21 and have been removed:
+ * PreparedEdit->newText
+ * PreparedEdit->oldText
+ * PreparedEdit->pst
== Compatibility ==
MediaWiki 1.31 requires PHP 5.5.9 or later. Although HHVM 3.18.5 or later is supported,