Is there any other e-commerce site besides PayPal?

How to integrate paypal button to a ecommerce site?

• I would like to start a ecommerce site to sell ebooks and I wanted to know, how to add the paypal button to my site so that customers can purchase through paypal.

• Answer:

  With ebooks, you'll probably want them to download the product after payment, that can be a little bit more involved than just adding a button. (people generally expect to be able to download digital products immediately after purchase) The way to do this is with something called IPN, or "Instant Payment Notification" basically, software on your site listens for events (such as "So-and-so paid me $x.yz") when it gets such an event, it sets a flag allowing them to download it. This will do it: http://www.geniegate.com/listings/payvex/ (Full disclosure, I own PayVeX) It'll also work with pecunix. (for international customers) You could write your own if you wanted, heres a helper class to get you started: http://www.geniegate.com/other/paypal/ Using OOP, just extend the class with your specific methods. (such as verifying the TXN, amount, payee)