I am finding my way out, integrating PayPal with PHP. But I have one question left. When reading this document: https://developer.paypal.com/docs/classic/ipn/gs_IPN/ PayPal recommends that we use:
header('HTTP/1.1 200 OK');
in order to to acknowledge receipt of the notification.
But in every tutorial I can find on the net, I see no trace of this.
Does that mean that it is after all not so important? Or otherwise where should one include this line?
Thanks for any tip.