I agree....you also know C, eh? Then you should not have any problems with .php at all. There is virtually tons of support for it on the web, and you should not have any problems picking up on the language at all.
And if you are looking for sample programs (I like to learn from actual code, rather than tutorials) then there is also a ton of that out there in the public domain.....Open Source project stuff. Just about anything you can think of.
Plus you can interface with mySQL Server to handle any database stuff.
PHP definitely. You can start at their main site at
http://www.php.net/