This is the script to place a call

make-call.php

<?php

require 'Services/Twilio.php';
include 'credentials.php';

$client = new Services_Twilio($AccountSid, $AuthToken);

$call = $client->account->calls->create(
    '1512-555-1212', // From this number
    '17035551212',   // Send to this number
    'http://twimlets.com/echo?Twiml=%3CResponse%3E%3CSay%3EHello%20Monkey!%3C%2FSay%3E%3C%2FResponse%3E&'
);
print $call->sid;