Last modified: 2014-02-12 23:53:57 UTC
Currently the MobileFrontend extension uses PHP templates (inside the views directory). This is a holdover from the old Ruby code and should be rewritten at some point to use standard MediaWiki coding conventions. As far as I'm aware, no other MediaWiki extension in Wikimedia's SVN repo uses PHP templates like this. There's no real reason to make an exception here.
Gone in 6d19e1e3a6cfbf8e2eae5c618c765cc3b2b66061 - https://gerrit.wikimedia.org/r/#change,5361