Created
August 13, 2016 10:24
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Forward PayPal IPN data to multiple URLs.
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<?php | |
// Curl function to send POST data to a server. | |
function curl_request($url, $req, $ssl) | |
{ | |
$curl_result=$curl_err=''; | |
$ch = curl_init(); | |
curl_setopt($ch, CURLOPT_URL,$url); | |
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1); | |
curl_setopt($ch, CURLOPT_POSTFIELDS, $req); | |
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/x-www-form-urlencoded", "Content-Length: ".strlen($req))); | |
curl_setopt($ch, CURLOPT_HEADER , 0); | |
curl_setopt($ch, CURLOPT_VERBOSE, 1); | |
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, $ssl); | |
curl_setopt($ch, CURLOPT_TIMEOUT, 90); | |
$curl_result = curl_exec($ch); | |
$curl_err = curl_error($ch); | |
curl_close($ch); | |
return $curl_result; | |
} | |
///////////////////////////////////////////////////// | |
// Set config fields | |
$sandbox = isset($_POST['test_ipn']) ? true : false; | |
$ppHost = $sandbox ? 'www.sandbox.paypal.com' : 'www.paypal.com'; | |
$ssl = $_SERVER['SERVER_PORT'] == '443' ? true : false; | |
// Loop through POST data and generate NVP string to return back to PayPal (or forward on to secondary listeners) | |
$req = ''; | |
foreach ($_POST as $key => $value) | |
{ | |
$req .= "&$key.=".urlencode(stripslashes($value)); | |
} | |
// Forward IPN data to secondary IPN listener | |
curl_request('http://www.domain.com/paypal/ipn/ipn-listener.php', $req, $ssl); | |
curl_request('http://www.otherdomain.com/paypal/ipn/ipn-listener.php', $req, $ssl); | |
curl_request('http://www.yetanotherdomain.com/paypal/ipn/ipn-listener.php', $req, $ssl); | |
// Validate with PayPal using CURL is much the same way we forwarded data to our secondary listener. | |
$req = 'cmd=_notify-validate'.$req; | |
$curl_result = curl_request($ppHost.'/cgi-bin/webscr', $req, $ssl); | |
$valid = strpos($curl_result, "VERIFIED")!==false ? true : false; | |
// Process accordingly | |
if($valid) | |
{ | |
// Process valid IPN | |
} | |
else | |
{ | |
// Process invalid IPN | |
} |
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