Paypal Webhook Listener

Hi, for a Shop Solution I need a Webhook Listener who updates a database when a payment has been completed ([login to view URL]) <?php public IActionResult Webhook() { // The APIContext object can contain an optional override for the trusted certificate. var apiContext = [login to view URL](); // Get the received request's headers var requestheaders = [login to view URL]; // Get the received request's body var requestBody = [login to view URL]; using (var reader = new [login to view URL]([login to view URL])) { requestBody = [login to view URL](); } dynamic jsonBody = [login to view URL](requestBody); string webhookId = [login to view URL]; var ev = [login to view URL](apiContext, webhookId); // We have all the information the SDK needs, so perform the validation. // Note: at least on Sandbox environment this returns false. // var isValid = [login to view URL](apiContext, ToNameValueCollection(requestheaders), requestBody, webhookId); switch (ev.event_type) { case "[login to view URL]": $pdo = new PDO('mysql:host=localhost;dbname=xxxx', 'xxxxx', 'xxx', array(PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8")); $sql = $pdo->prepare("INSERT INTO wp_listening (info) VALUES ('hat funktioniert')"); $sql->execute(); break; case "[login to view URL]": $pdo = new PDO('mysql:host=localhost;dbname=xxxx', 'xxxx', 'xxxx', array(PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8")); $sql = $pdo->prepare("INSERT INTO wp_listening (info) VALUES (?)"); $sql->execute("hat nicht funktioniert"); break; // Handle other webhooks default: break; } return new HttpStatusCodeResult(200); } ?>