[Wolves] PHTML?

[Philip Harper]

I've seen the extension .PHTML used recently on one site and I'm 
intrigued as to what this is as I haven't come across it before.

The only real reference I can find on google is a library that 
encrypts/protects PHP scripts, not sure why you would want to do this 
though, as to actually get the PHP source for a script an attacker would 
need to actually have access to the server side anyway?