Paypal has a shopping cart system already made which is simple to use if you want an easy way to do it. Just go into your merchant section, and they have a step by step tutorial.
But on the other than paypal shopping carts don’t look very professional. Probably having a form come up for the final amount might be a good idea, but I’d do your shopping cart section in PHP and keep it local.
here is the fla to show what i mean (sorry i didnt include it before)
but what i have is a link to my pay pal account for my clients to make payments for thier order. but – i want to receive the php form as to what they ordered too
(mind you – this form is really raw - i just wnated to give an idea of what i am doing