Thread:Talk:Compatibility/PHP 5.5 unresolved issues?/reply

I personally don't know, but I've love to have more information from the real world.

If you're running PHP 5.5, could you try and let us know whether you're finding any problems? Try using the web installer, create an account and make an edit. If you haven't encountered an exception by then and the error log is empty, that probably asserts the fast majority of the code is compatible.