How can get MAC pc and mobile address and IP address in php

Description

Mac address only get on local pc and get ip addrerss in php code

Mac address not working on online browser

How can get server address, REMOTE address, 

Get mac Address code in php

<?php system('getmac'); ?>

server address

<?php echo $_SERVER['SERVER_ADDR']; ?>

server REMOTE address

<?php echo $_SERVER['REMOTE_ADDR']; ?>