POST Parameters

Maybe my problem ist simple to solve, but I can´t. Here it is: A special PHP CGI Script, let´s say 'phpscript.cgi' might be called with GET or POST Parameters. Though I will never now which kind and how many of such parameters will be passed to that script, I have to do some work of mine with them and after that would like to call (redirect to) an other script passing exact the same amount and type of pararmeters origninally given to my famous phpscript.cgi. I just succeeded in handling the URL based stuff like Host, Scriptname GET Paramters etc. But how to handle the POST Data ? Any guess out there ? brgds stephan