Is there a PHP bridge type add-on?

Basically I want to write custom PHP scripts on my pages while still keeping the basic xenforo look of my forum.. is there an add-on that does this?.. There is a wiki type add-on i tried which works to an extent but I really dont need the features it comes with, just the ability to have custom PHP pages is all I need.
This doesnt seem to work anymore, I recently reinstalled XF and this, is there anything else like it? I basically just want to be able to get username / id from XF but on a custom PHP page.