WHMCS phone verify

In the WHMCS order form, I want it so that next to the phone number, you will click a button that says verify. A phone call will be placed using asterisk to the phone number listed, and a recording will say "your verification code is 3 5 6 2 2" that is just a example of what the randomly generated message would look like. They must enter the correct random code to be allowed to submit the form. A example of what I am looking for similar to [login to view URL] [login to view URL] wrong number attempts should have a log sent to the Apache [login to view URL] successful attempts should send a log entry to apache [login to view URL] and allow the person to finish signing up. The coding must use AJAX, Asterisk AGI interface, PHP, [login to view URL] [login to view URL] Options that will be set in configuration, random code size, ring duration, caller ID number.