function conference()
{
global $voice;
$tropo = new Tropo();
$tropo->setVoice($voice);
$result = new Result();
$conference = $result->getValue();
$tropo->say('<speak>Conference ID <say-as interpret-as=\'vxml:digits\'>' . $conference . '</say-as> accepted.</speak>');
$tropo->say('You will now be placed into the conference. Please announce yourself. To exit the conference without disconnecting, press pound.');
$tropo->conference($conference, array('id' => $conference, 'terminator' => '#'));
$tropo->say('You have left the conference.');
$tropo->on(array("event" => "continue", "next" => "restart"));
$tropo->RenderJson();
}
<?php
require 'tropo.class.php';
error_reporting(0);
$tropo = new Tropo();
$session = new Session();
$from = $session->getFrom();
$callerID = $from["id"];
$tropo->say("You are about to enter the conference");
$tropo->conference(null, array("id" => "1234", "name" => "joinleave", "joinPrompt" => "{$callerID} has entered the conference", "leavePrompt" => "{$callerID} has left the conference", "voice" => "Kate"));
$tropo->RenderJson();
