Which to use: REMOTE_ADDR or SERVER_ADDR

Question

Any real difference between

$_SERVER[\'REMOTE_ADDR\']
$_SERVER[\'SERVER_ADDR\']

I\'m tracking visitors to a page, and I\'ve always used

Answer 1

SERVER_ADDR is the address of the server PHP code is run on. You don't need to collect it. REMOTE_ADDR is the one you want.