Unique Conference

conference.php

<?php
/*
 * Download the twilio-php helper library from:
 * https://github.com/twilio/twilio-php
 * Copy the "Services" folder into the directory containing this file.
 */
require('Services/Twilio.php');

$response = new Services_Twilio_Twiml;
$dial = $response->dial();
$dial->conference($_GET['conference_name'], array(
    "waitUrl" => "http://twimlets.com/holdmusic?Bucket=com.twilio.music.guitars",
));
print $response;

double_call.php

<?php
/*
 * Download the twilio-php helper library from:
 * https://github.com/twilio/twilio-php
 * Copy the "Services" folder into the directory containing this file.
 */
require('Services/Twilio.php');

$site_path = "http://example.com";

$account_sid = "ACXXXXXX"; // Your Twilio account sid
$auth_token = "YYYYYY"; // Your Twilio auth token

$caller_id = "+18085558901"; // The phone number you want the call to come from

$user_1 = "+17075559876";
$user_2 = "+15305551234";

$conference_name = urlencode(base64_encode(time().$user_1.$user_2));

$url = $site_path."/conference.php?conference_name=".$conference_name;

$client = new Services_Twilio($account_sid, $auth_token);
$call_1 = $client->account->calls->create(
    $caller_id, $user_1, $url
);
$call_2 = $client->account->calls->create(
    $caller_id, $user_2, $url
);