SMS Notification to Conference

01_start_conference.php

<?php

// This is the Voice Request URL to start the conference.

require_once('path/to/Services/Twilio.php');

$ACCOUNT_SID = 'ACxxxxxxxxxxxxxxxxxxxx';
$AUTH_TOKEN = 'yyyyyyyyyyyyyyyyyyyyyyy';
$CALLER_ID = '+1aaabbbcccc';

$user_to_request_conference_attendance = '+1xxxyyyzzzz';

$client = new Services_Twilio($ACCOUNT_SID, $AUTH_TOKEN);

$msg = $client->account->sms_messages->create(
    $CALLER_ID,
    $user_to_request_conference_attendance,
    'Would you like to join the conference? Reply yes or no.'
);

header('Content-type: text/xml');
?>
<Response>
    <Redirect>03_complete_conference.php</Redirect>
</Response>

02_handle_sms_response.php

<?php

// This is the Voice Request URL to start the conference.

require_once('path/to/Services/Twilio.php');

$ACCOUNT_SID = 'ACxxxxxxxxxxxxxxxxxxxx';
$AUTH_TOKEN = 'yyyyyyyyyyyyyyyyyyyyyyy';
$CALLER_ID = '+1aaabbbcccc';

$response = $_REQUEST['Body'];

if ($response == 'yes') {
    $client = new Services_Twilio($ACCOUNT_SID, $AUTH_TOKEN);
    $call = $client->account->calls->create(
        $CALLER_ID,
        $_REQUEST['From'],
        "http://example.com/path/to/03_complete_conference.php"
    );
}

?>

03_complete_conference.php

<?php
header('Content-type: text/xml');
?>
<Response>
    <Dial>
        <Conference>SMSNotificationToConference</Conference>
    </Dial>
</Response>