send a POST to a URL from within PHP code

Hi all, I would like to simulate sending a form in POST to a specified URL through PHP. I knwo how to do this from a HTML form : <form method="post" action="http://url.com/query"> blablabla </form> I would just like to simulate this because I have some processes that will change the values of the form before sending it to the 'action' URL With a GET, the fields would be included into the query strinbg, so this is quite easy. What happens in a POST? Any idea is welcome Vincent mailto: vincent.dupont@ausy.be