I'm integrating PayPal with a website offering subscriptions and am using PayPal's PHP script to process IPN (Instant Payment Notification). The following statement creates an error (HTTP ERROR).
$fp = fsockopen ('ssl://www.paypal.com', 443, $errno, $errstr, 30);
This statement posts back to PayPal to validate. Does anyone know why this statement creates an error on Zymic Web Hosting?