/**
* function to process Instant Payment Notifications from Paypal
*/
public static function processIPN()
{
$options = SimplePayPalPluginAdmin::get_paypal_options();
$ppHost = isset($_POST['test_ipn']) ? $options["paypal_sandbox_url"] : $options["paypal_url"];
$req = 'cmd=_notify-validate';
$ipn_data = array();
/* prepare echo */
foreach ($_POST as $key => $value) {
$value = urlencode(stripslashes($value));
$req .= "&" . $key . "=" . $value;
$ipn_data[$key] = urldecode($value);
}
/* Validate IPN with PayPal using curl */
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $ppHost);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $req);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/x-www-form-urlencoded", "Content-Length: " . strlen($req)));
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_VERBOSE, true);
curl_setopt($ch, CURLOPT_TIMEOUT, 30);
$curl_result = @curl_exec($ch);
$curl_err = curl_error($ch);
$curl_info = curl_getinfo($ch);
$ci = "";
foreach ($curl_info as $k => $v) {
$ci .= $k . " : " . $v . "\n";
}
/* are we verified? If so, let's process the IPN */
if (strpos($curl_result, "VERIFIED") !== false) {
/* decrease stock levels of items */
$i = 1;
while (isset($_POST["item_number" . $i])) {
if (isset($_POST["quantity" . $i])) {
$paypal = SimplePaypalPluginAdmin::get_paypal_meta($_POST["item_number" . $i]);
if ($paypal["stock_no"] > 0) {
$paypal["stock"] = $paypal["stock_no"] - (int) $_POST["quantity" . $i];
if ($paypal["stock"] < 0) {
$paypal["stock"] = 0;
}
update_post_meta($_POST["item_number" . $i], 'sppp', $paypal);
update_post_meta($_POST["item_number" . $i], 'sppp-stock', $paypal["stock"]);
}
}
$i++;
}
/* store IPN in database */
global $wpdb;
$txn_id = isset($ipn_data["txn_id"]) ? $ipn_data["txn_id"] : '';
$txn_type = isset($ipn_data["txn_type"]) ? $ipn_data["txn_type"] : '';
$mc_gross = isset($ipn_data["mc_gross"]) ? $ipn_data["mc_gross"] : '';
$tablename = self::get_payments_tablename();
$wpdb->insert($tablename, array("payment_date" => time(), "payment_ipn" => serialize($ipn_data), "txn_id" => $txn_id, "txn_type" => $txn_type, "mc_gross" => $mc_gross), array("%d", "%s", "%s", "%s", "%s"));
}
if (is_email($options["paypal_ipn_email"])) {
wp_mail($options["paypal_ipn_email"], "IPN CURL report", "CURL result: " . $curl_result . "\n\nCURL error: " . $curl_err . "\n\nCURL info: " . $ci . "\n\nIPN:\n\n" . $req, "From: " . $options["paypal_email"] . "\r\nReply-To: " . $options["paypal_email"] . "\r\n");
}
curl_close($ch);
}
