kookoolib

<?php

require_once('response.php');// this is kookoo library. You can download it from KooKoo website.
$r= new Response();
//you will get the key after registering at mixpanel.
$metrics = new MetricsTracker("your_mixpanel_api_key");

if($_REQUEST['event'] == 'NewCall')
{
//get the phone number of the person who called