Logging IP Addresses

[Ntrimgs]

I want to be able to record and write to a file the IP address of users when they go to a certain page on a website. Can this be done with PHP?

[tirna]

Can this be done with PHP?

yes it can.

The calling IP addresses are stored in a session array $_SERVER and can be got at by $_SERVER['REMOTE_ADDR'].

You can then save the value to a file or database.

[dk_zero-cool]

REMOTE_ADDR does not always contain the right IP.

function get_ip() {
    if(!empty($_SERVER['HTTP_CLIENT_IP'])) return $_SERVER['HTTP_CLIENT_IP'];
    elseif(!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) return $_SERVER['HTTP_X_FORWARDED_FOR'];
    elseif(!empty($_SERVER['HTTP_X_FORWARDED'])) return $_SERVER['HTTP_X_FORWARDED'];
    elseif(!empty($_SERVER['HTTP_FORWARDED_FOR'])) return $_SERVER['HTTP_FORWARDED_FOR'];
    elseif(!empty($_SERVER['HTTP_FORWARDED'])) return $_SERVER['HTTP_FORWARDED'];
    else return $_SERVER['REMOTE_ADDR'];
}