What is the correct way to track PayPal purchases that use the standard payment button?
I see on https://www.x.com/developers/paypal/documentation-tools/paypal-payments-standard/integration-guide/Appx_websitestandard_htmlvariables I can fill out the return and rm parameters, but I read somewhere that it requires the user to click "continue" in their browser after the payment has been completed in order to be redirected back to your site. So if they just close the browser it doesn't register accurately.
Also, for the 'rm' parameter it says that if you specify 2, the buyer's browser is redirected and all payment variables are included via POST. But what are the payment variables??
Also how can I test that it's working correctly without actually paying myself?