POST from within a script?

I am trying to write a script that will go through an array of orders and start a separate HTTP connection (to execute a CGI on another server on the internet) for each one. I am currently using fopen() to pass the required parameters via GET but for security would like to pass the parameters by POST instead. How can I do it? I don't think I can use the include() function as it's a CGI-script on another server..can I? PS It's an old version of PHP3 on my ISP! Many thanks John -- // John Portwin <john@mobiletones.com> // Technical Director, mobiletones.com Ltd