Today, I'm going to reveal a big secret (that I mentioned in my first post). All of my website runs on PHP. I am going to show how you can do this too.
Before we get started, you need an Apache web server and access to a file called ".htaccess" (no the dot is not a typo).
.htaccess files affect the directory they are placed in and all sub-directories.
Some sites do not allow use of .htaccess files, since depending on what they are doing, they can slow down a server overloaded with domains if they are all using .htaccess files. I can't stress this enough: You need to make sure you are allowed to use .htaccess before you actually use it. Some things that .htaccess can do can compromise a server configuration that has been specifically setup by the admin, so don't get in trouble.
OK. Once you have a(n) ".htaccess" file on your server, you should keep anything that is there and type
RewriteBase / at the top if it's not there. The following two lines will tell the server to parse HTMLs as PHP!
RemoveHandler .html .htm AddType application/x-httpd-php .php .html