i sell software A on a website. after a customer pays thro paypal, how do i direct that user to a secure download page (inaccessible by typing URL)? do i need a service or a software to do this?
You'll need to incorporate an IPN (Instant Payment Notification) script so that PayPal will notify your server when the transaction is complete. From there your script can grant access to a restricted area for your customer. Hope this helps
in my previous company that i work at our developers use OScommerce and Zen cart but they are doing some modifications...