PHP question. How to send data using fwrite?

[volcs0]

I want to set up a mini-API for a bunch of php scripts I've written.

I want my script to be able to get data using fopen.

eg.

$url = "http://www.mypage.com/myscript.php?foo=1&bar=2"
$handle = fopen($url, "r");

And have myscript.php return a stream of data based on inputs foo and bar.

My question is, how do set up myscript.php? How do I "send" the data? Is it fwrite? Open stream? POST?

I can usually figure things out by googling around, but this one has me stumped.

Thanks.

Sam V.