* The DeferredStringifier class is deprecated, use Message::listParam() instead.
* The type string for the parameter $lang of DateFormatter::getInstance is
deprecated.
+* The global functions wfProfileIn and wfProfileOut, deprecated in 1.25, have been removed.
== Compatibility ==
MediaWiki 1.31 requires PHP 5.5.9 or later. Although HHVM 3.18.5 or later is supported,