Call me and Read Me A Text

sms.php

<?php

   // Where I define my credentials in AccountSid and AuthToken
   include("../config.inc");

   // Twilio Helper Library
   include("twilio.php");

   $what = $_POST['Body'];
   $T = new TwilioRestClient($AccountSid, $AuthToken, "https://api.twilio.com/2010-04-01");

   $vars = array("Url" =>
      "http://twimlets.com/message?Message%5B0%5D=" . urlencode($what),
      "From" => $_POST['To'],
      "To" => $_POST['From']
   );

   $resp = $T->request("Accounts/${AccountSid}/Calls", "POST", $vars);
   header("Content-type: text/xml");
?>
<Response>
</Response>