Agent df

function dfInfoAgent()
{
    $emailToNotify = 'dm@s.dp.ua';
    $serverName = 'trikotaj.net.ua';
    $subject = 'Disk usage ' . $serverName;
    $df = shell_exec('df -h /home/bitrix');
    mail($emailToNotify, $subject, $df);

    return __FUNCTION__ .'();';
}