280403 php site replication

I'm looking to create a really simple replicated site system for my associates to use. What this program will do is show my site pages with their personal information in it. When this is done each associate will have a unique location on my server that they can use to promote the program. It would look like this: [login to view URL] Here's how I think it should work. I'm open to suggestions of course. 1. I keep all site files in the root (public_html) directory. My index files, etc. 2. My associate goes to a special page on the server and fills in a form that asks for all the necessary variables that will personalize the site. For example, username, first name, last name, email address, phone, etc. 3. When they hit submit a php file is created in a separate directory with all those included variables. The directory is called /username/ and the file can be username-variables.php. 4. When someone browses to the url [login to view URL] the program reads in the files from the root and substitutes all the variables with their personal information. So for example, [login to view URL] shows the index file located in mydomain.com. [login to view URL] shows [login to view URL] but with the username's specific variables. Please let me know if I need to clarify this further. It's pretty simple in concept.