ColdFusion to PHP

I want to convert the ColdFusion area of my web site to PHP. It will use the mySQL database. There are about 35 ColdFusion pages ranging from simple form processing to moderatly complex form generation and processing. The MySQL code could be reused (mostly). I have set up a demo user so that you can see the ColdFusion app. Web site: [login to view URL], login in upper right. Login/password: phpConvert/phpConvert. Of course this needs to be as seemless as possible so the site is not down.