I made a payment button that works with paypal. everything works, but I do not know how to show the outcome of the operation to the user. I am using this code in the "notify_url": https://github.com/paypal/ipn-code-samples/blob/master/paypal_ipn.php On this page I can handle errors and deciding on the message to be displayed on the page of "return" but as a step this error from the page of "notify_url" to that of "return"? Thanks.
ps: I tried ocn the $ _SESSION but it does not work.