Nope, you can call the php functions inside of html page and vice versa.
Thanks for the rate
off-topic: Someone trying interesting things on my website

173.245.53.207 tried to load greenfive.tk/admin
173.245.53.207 tried to load greenfive.tk/Trolll
173.245.53.207 tried to load greenfive.tk/Hack
173.245.53.207 tried to load greenfive.tk/login
173.245.53.207 tried to load greenfive.tk/sex.html
173.245.53.207 tried to load greenfive.tk/login.html
User Agent = Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.63 Safari/535.7
Custom 404 with tracking & email response(to me) page.