PHP: is it possible to use php to get the MAC address?

I'm wondering how can i get the MAC Address using PHP. I look over the manual and i don't see any function to work on this as of now.

Sure, use exec() to run ifconfig (or ipconfig /all on windows) and parse the result.

You can parse the output of "ifconfig" command or you can parse file "/proc/net/arp". They both contain MAC addr.