Connecting to Cisco Router

Hi all, i'm quite new to PHP, and i was wondering if it is possible to connect to a Cisco Router using PHP.

The router i'm using is a Cisco 2811, and it has a password enabled.
i'm trying to make this PHP coded program be able to go into this router(terminal server), then through the terminal server to access another router which is connected to it and be able to configure the router using the PHP program.

Well, the quick answer is sure, why not?
The better question is why?

Doing serial communication in PHP is well tricky. If you have it enabled for you to be able to access the router via the network is going to be easy(er) but, I'm sure there is some other way to accomplish what you are trying to do.