Cron Job to Run PHP Script



I am in the process of creating a PHP application, and I need a Cron Job command that will access a URL to a PHP script every 15 minutes. I have the ability to setup a Cron Job through CPanel and I have curl installed on my server.

If you know how to do this, please send an email to caseyomartin [at] yahoo [dot] com, and wait for a reply before offering assistance. In return, I will offer 6 months of free hosting through my web hosting business to the person who is able to get a command to work successfully.