phpagi conference system

#!/usr/bin/php -q
<?php
set_time_limit(30);
require('/var/www/html/project1/phpagi-2.20/phpagi.php');

error_reporting(E_ALL);
$agi = new AGI();
$agi->answer();
//http://php.net/manual/en/function.date.php
$time=date('a');

$agi->stream_file("welcome");

 $cid = $agi->parse_callerid();
$agi->verbose($cid[username]);

$agi->verbose($time);
$agi->set_variable("CONFBRIDGE(user,pin)",1212);
$agi->set_variable("CONFBRIDGE(bridge,max_members)",2);

//ConfBridge(conference[,bridge_profile[,user_profile[,menu]]])

$agi->exec("ConfBridge","111");

//$agi->exec_goto('from-internal',$value,1);
?>

[outboundtest]

exten=>100,1,answer()

;same=>n,Set(CONFBRIDGE(user,pin)=1111)

;same=>n,Set(CONFBRIDGE(bridge,max_members)=2)

exten=>100,n,agi(/var/www/html/conference/conf.php)

same=>n,hangup()