If it failed the user is given a choice to try again or choose a different payment option. I only update the actual payment status of the order upon receiving an IPN update from Pay Pal.This IPN update results again in a POST request to the Pay Pal server and the status received then will be used to update the payment status.Email Notifications are one of the ways Pay Pal merchants get to know about placed orders.But there are other notification methods which run in the background and whose power we can tap to get real time and accurate information about orders and customers.So when the user returns from Pay Pal the website is issuing a POST request (server side) to the Pay Pal server and the current status is retrieved.This information is displayed to the user along with any order details.But I cannot exactly follow the documentation here What I am not getting is Once you have activated PDT, every time a buyer makes a website payment and is redirected to your return URL, a transaction token will be passed along as a "GET" variable to this return URL.In order to properly use PDT and display transaction details to your customer, you should fetch the transaction token, variable name "tx", and retreive transaction details from Pay Pal by constructing an HTTP POST to Pay Pal. You must post the transaction token using the variable "tx" and the value of the transaction token previously received (e.g.
I found some good sampling code of how everything should work but it still does not work. When I integrate Pay Pal I only use the PDT transaction token on the return URL to let the user view the status of the payment.
PDT and IPN are the two notification methods which do this and here, we are going to put them to test against each other.
IN Pay Pal PDT vs IPN, we will look at the advantages and disadvantages of Pay Pal PDT and IPN services and compare them to see who fits in your use case and what you should be using to get notified.
Pay Pal IPN: Instant Payment Notification is a way in which Pay Pal sends a GET request to a notification URL (configured from your Pay Pal account).
This happens in the background and the buyers are oblivious to it.