How to make cURL redirect the user

[optikalefx]

I have a paypal shopping cart form.  Right now the form submits to paypals normal site and works fine.  But the problem is the user can use firebug and change the price before sending to paypal.

 

So i want the form to submit to my php script, where ill whatever is in the session, not what was posted, create an NVP string from that post, then POST that to paypal.

 

I thought i could do this with cURL, but cURL always responds, it never actually takes the user to paypal with post.  Is there a way to mimic what a form submit does completely in PHP?

[optikalefx]

turns out with paypal you can send it all in the url

 

header("Location: https://www.paypal.com/cgi-bin/webscr$nvp");