TwiML for a long distance phone dialer

twilio_ld.php

<?php

$my_url = 'http://MYDOMAIN.COM/twilio_ld/twilio_ld.php';

echo '<?xml version="1.0" encoding="UTF-8"?>';
echo '<Response>';

if (array_key_exists('passcode_check', $_GET)) {
  if ($_POST["Digits"] == '1') {
    echo '<Gather timeout="5" finishOnKey="*" action="' . $my_url . '?dial">';
    echo '<Say>OK. Type the number.</Say>';
    echo '</Gather>';

  } else {
    // This person doesn't know to press 1. Probably an autodialer.
    echo '<Hangup/>';
  }

} else if (array_key_exists('dial', $_GET)) {
  echo '<Say>Alright! Calling the number!</Say>';
  echo '<Dial callerId="+16131112222" action="' . $my_url . '?call_complete">';
  echo '  <Sip username="VOICETRADINGUSERNAME" password="VOICETRADINGPASSWORD">';
  echo '    sip:00000' . $_POST["Digits"] . '@sip.voicetrading.com';
  echo '  </Sip>';
  echo '</Dial>';

} else if (array_key_exists('call_complete', $_GET)) {
  if ($_POST["DialCallStatus"] == "busy") {
    echo '<Say>Sorry, couldn\'t connect. The line was busy.</Say>';
  
  } else if ($_POST["DialCallStatus"] == "no-answer") {
    echo '<Say>Sorry, couldn\'t connect. Nobody answered.</Say>';

  } else if ($_POST["DialCallStatus"] == "failed") {
    echo '<Say>Sorry, there was a problem connecting. Check the phone number.</Say>';
  }
  echo '<Pause length="1"/>';
  echo '<Hangup/>';

} else {
  echo '<Gather timeout="5" finishOnKey="*" action="' . $my_url . '?passcode_check">';
  echo '<Pause length="1"/>';
  echo '<Say>Hello!</Say>';
  echo '</Gather>';
}

echo '</Response>';

?>