可以使用php或javascript访问物理地址。

Can we access physical address (Mac Address) with php or javascript?

For my site I have to identify each system (if on same network or different) uniquely.

Thanks

You should look at https://panopticlick.eff.org/index.php?action=log&js=yes and try to do the same. It will give you a pretty uniq identification of each browser who come to you're website.

This can help you to http://www.pinlady.net/PluginDetect/

Try this out.

$mac = system('arp -an'); echo '<pre>'; print_r($mac);

Hope this will help...

Keep clam & Keep coding