I have been able to create the html to create a recurring billing on paypal. Now, I want my system to know each month when the installment has gone through, so I can update my database, etc. To be clear, I don't want to have to login to paypal to get the info. I want to be able to write php code that will detect that an installment of a recurring billing has gone through. I spent quite a while looking for answers. I'm afraid I'm not very good at understanding the paypal documentation. Any help would be greatly appreciated.
