[PHP] "simulate" form submission

[Pascal Polleunus]

Hi,

Does someone know how to "simulate" a form submission?
I guess I need to do something like
        header("Location: http://www.mysite.com";);
        header($PostVarsData);
where $PostVarsData must contains the header informations to send the post vars

but what are these header informations?
how can I handle that?

Thanks,
Pascal