Can vba be integrated with a php driven web page?

I have some things already designe don my web page that I'd like to keep the basic functionality of, though I'd like to integrate the entire site with vbulletin. Can someone tell me if I can do the same things as I'm doing now, only to add some integration using vba? www.runeescape.net is the site -- click on "Addiction" and see if something like that could still be done. It basically checks to see if the next chapter/section exists, and if it does, reads the contents into the page when you click on next or previous.