For the record, we use php mostly to insert menus and common things. For example, on a story, there are links to all the chapters and the main index of that story for many of our authors. with php, we update those links once, and it appears on all chapters.
The end result to the user (you) is an html file that already has all the stuff because the server puts that information in when you go to view it.
We will not be offering that option in the near term. We may consider it as part of a premium service for Gay Authors. (it costs us a non-inconsiderable amount of money each month to keep Gay Authors open for everyone)