If possible, I'd like this functionality to be added.

Basically, if I right click a function(PHP/JS, etc), I'd like an option for "Find all References" or some such thing. This would then show me all of the places in the project that the function/class/whatever is used. This is more than a text search, in that it knows it's a function/class and doesn't just match text but actual references.

Either way, this is a sweet IDE and I'm happy to be using it! I just think this would be a nice addition as well.

This is what Search->Find Usage (Ctrl-U) does.

By default it appears this is CTRL-F7, not CTRL-U. However, this doesn't appear to work with Javascript, I get the error popup "No valid PHP identifier could be found under cursor".

Correct. It does not work with JS files. Will be implemented in a future version.

Cool, thanks much!