There's been discussions before about being able to share code style settings between MediaWiki users for PhpStorm. To this end, I've started a PhpStorm plugin [1] that adds this functionality, allowing preferences to be set from a MediaWiki predefined style. Thanks to Siebrand and Physikerwelt for their example configurations.
There is also functionality to search MediaWiki.org for selected text using the context menu.
It can be installed using the inbuilt plugin manager in PhpStorm.
More functionality to come, somewhat emulating the Wordpress plugin [2]. I imagine the Hook support would be quite useful for many people too.
Code is currently on github [3], maybe should be moved to gerrit sometime in the future. Pull requests and issues happily accepted.
Sam
[1] http://plugins.jetbrains.com/plugin/7439
[2] http://blog.jetbrains.com/phpstorm/2014/03/wordpress-support-in-phpstorm-8-e ap/