Handling Asterisk Manager events from AGI script in PHP

event_handler.agi.php

#!/usr/bin/php -q
<?php

require_once(dirname(__FILE__) . DIRECTORY_SEPARATOR . 'phpagi.php');

$AGI = new AGI();

$ASM = $AGI->new_AsteriskManager();
$ASM->connect();

function meetme_join($event, $parameters)
{
    # code...
}

function meetme_leave($event, $parameters)
{
    # code...
}

$ASM->add_event_handler('MeetmeJoin', 'meetme_join');
$ASM->add_event_handler('MeetmeLeave', 'meetme_leave');

$ASM->Events('on');

while(1) {
    $ASM->wait_response();
}