Sample code

https://www.paypal.com/cgi-bin/webscr?business=payments%40tsne.org&cmd=_xclick¬ify_url=https%3A%2F%2Frethinkingoverhead.org%2F%3Foptimizemember_paypal_notify%3D1&cancel_return=https%3A%2F%2Frethinkingoverhead.org%2F&return=https%3A%2F%2Frethinkingoverhead.org%2F%3Foptimizemember_paypal_return%3D1%26optimizemember_paypal_return_tra%3DfnhlOjcwOTQ4MzY4NmZkNDNmNGE2NmIyYTcxZmYxZGIwYmQwfNfSs8Ojratlkb2mnGZzeMqzjX7lnJSPdppVo-WOdqFzubKFgN2KdLFmemWQw7SKjYW_yWWH7W6LoIeWe4bXe6l9hrbXcq6nfHZve3qPWa3InIKgg8Xmh6zEsaWUkppppOltlqCLprV2s7Sjd4CbxYms4LR2i3aqpYaU7ISTsIeVp3yJunymtFbJtKeEb6yQhoyNZa3VnYiOjKXa03Z_2ot2fIV2jIu2sXuEZb6-8Me8xrB3fr-0Zo-gh4iJgpd4r3OUd6uCpW3Ad2OLeJBlqo2Qg5uDjumfqYuZ18LVy7Lc66CGodxudIayY8t_rN2ry6PQ4Hyyimpsxo_cgMOuxraRvIatdqzembx6VZ2x&rm=2&no_shipping=1&no_note=1&custom=rethinkingoverhead.org¤cy_code=USD&page_style=paypal&charset=utf-8&item_name=Individual+%2F+Access+for+two+months&item_number=1%3Abasic%3A2+M&invoice=6073780035229%7E3.238.88.35&on0=Originating+Domain&os0=rethinkingoverhead.org&on1=Customer+IP+Address&os1=3.238.88.35&modify=0&amount=57&bn=Creative6Media_SP