This script display the mac id of PC which is hosted the APACHE server and not the client pc who is accessing.
ob_start();
system(“ipconfig /all”);
$cominfo=ob_get_contents();
ob_clean();
$search = “Physical”;
$primarymac = strpos($cominfo, $search);
$mac=substr($cominfo,($primarymac+36),17);//MAC Address
echo $mac;
?>