I'm using a donate button and want to take donors back to my website after payment completed. Is there a way to specify a dynamic Complete URL for each donation, i.e. using a variable (rather than a fixed URL)?
I've tried hidden fields and it doesn't make any difference (it always returns as GET method):
<form action="https://www.sandbox.paypal.com/donate" method="post" target="_top">
<input type="hidden" name="hosted_button_id" value="WHATEVER" />
<input type="hidden" name="rm" value="2" />
<input type="hidden" name="return" value="https://mywebsite.com/?paypal=complete&custom=COMPLETE-123" />
<input type="hidden" name="complete_url" value="https://mywebsite.com/?paypal=complete&custom=COMPLETE-URL-123" />
<input type="hidden" name="complete_return" value="https://mywebsite.com/?paypal==complete&custom=COMPLETE-RET-123" />
...
</form>
Note: I can use IPN fine, but IPN is asynchronous and I want to give each specific user a confirmation page after PayPal payment is completed when they return to my website. Problem with cookie and PHP session_id is that it doesn't always work. The session_id changes when PayPal returns to my website.
