PHP function to add Addon Domain

Hi, I have a PHP script that uses cpaneluapi.class.php to create a MySQL database, user, password and connects the user to the database. I need to add the code to create a ADDON DOMAIN and "put the domain addon" outsite public_html. For example: main domain: www.seconddomain.com in /home/user/seconddomain.com Is this possible? thanks, Francisco