HTTP POST Question

Good morning... This should be a good monday morning question. I have a cgi-bin written in perl (it's actually, a interface to a perl-module which is a interface to a telnet-like protocol). Anyways what I need to do is I have already existing code written in PHP, but at some point I need to call this cgi-bin and get a return code from it and process (good/bad result) and return to completed php script that says it called this cgi-bin. It's not very clear how to set the HTTP_POST_VARS for sending to a post command (which doesn't seem to exist); Any ideas I don't see a function called: $HTTP_POST_VARS =set variables; $result = http_post("http://localhost/cgi-bin/script.pl"); Thanks, evan PS. I'd appricate a working example, even if it's a dummy version.