How to get CPU usage and RAM usage without exec?

Question

How does VBulletin get the system information without the use of exec? Is there any other information I can get about the server without exec? I am interested i

Answer 1

execquery("SELECT LoadPercentage FROM Win32_Processor");  
        $cpu_num = 0;
        $load_total = 0;
        foreach($server as $cpu)
        {
            $cpu_num++;
            $load_total += $cpu->loadpercentage;
        }

        $load[]= round($load_total/$cpu_num);

    } 
    else
    {
        $load = sys_getloadavg();
    }
    return $load;
}
echo implode(' ',get_server_load());