I have recently built a site for a custoemer and needed to integrate PHP code into the pages. For items above the this was easy as RW provides a GUI inteface to do this. What was a pain was I also needed to add somecode after the tage i.e. the very last line of the page code. This I could not do via RW. I have to publish the site and manually edit the file to add the content and overwrite the files on the server.
I also needed to insert a call to a function to display data where I wanted on the page, again this was a manual task to edit and overwrite the published page.
It would be nice if this could be managed and controller from inside RW7.