title: PayPal Donate Button Redirect After Payment
body: <p>I know how to make a PayPal donate button redirect after payment, but what I need to know is, can you pass the payed amount through this redirection. So it would redirect to <code>http://example.com/donate?amount=123</code>, is this even possible?
  Thanks!</p>
  
  <p>EDIT: It seems I can do it with IPN(?), I just don't know how to use paypal's IPN, can anyone help me? (yes I have read the docs, they are confusing)</p>