How to get MAC address of client using PHP?

Question

How can I get MAC Address using PHP or javascript...

Answer 1

Use this function to get the client MAC address:

function GetClientMac(){
    $macAddr=false;
    $arp=`arp -n`;
    $lines=explode("\n", $arp);

    foreach($lines as $line){
        $cols=preg_split('/\s+/', trim($line));

        if ($cols[0]==$_SERVER['REMOTE_ADDR']){
            $macAddr=$cols[2];
        }
    }

    return $macAddr;
}