$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://affiliate.frankstrade.com/plugins/PayPal/paypal.php?pap_custom=".$_GET['pap_custom']);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $_POST);
curl_exec($ch);