Yes, here it is: http://www.123formbuilder.com/tutorials/webhooks-sample.php?id=52. It is a script that takes user input and sends it to an email address. At the end of the URL, you can see the ID of the form for which this script works. You can change the ID and the email address that appears at the end of the script and use the script as it is, by pasting the URL in your Settings → Applications → WebHooks box. You can also use the script as a starting point and customize it in any way you wish.