How to obtain ip address ...

[Anon]

I need to get IP address of user that is using IP currently. I need to get it so I can make registration restrictions to cover only 1 per day per IP. Any help or example code?

[Anon]

$ip = $REMOTE_ADDR;

the $REMOTE_ADDR environment variable contains the user's IP..

[Anon]

remember, in this instance, people who are on a dialup can register as many times as they like, since they get a new ip each time they connect to their isp. And users on a shared connection block out any registration for other users on the same connection.

[Anon]

Thanks from the replys. I know these kind of problems but its still somekind of spam protection.

[hueholleran]

Hi,

I'm replying because I haven't seen a correct answer to this posted yet (or maybe I just haven't looked hard enough):

$HTTP_SERVER_VARS['HTTP_CLIENT_IP'] will correctly return the client IP address, i.e. the IP address of your user's PC with which they are currently on the Internet.

$GLOBALS['REMOTE_ADDR'] or $REMOTE_ADDR or $HTTP_SERVER_VARS['REMOTE_ADDR'] may return the client IP address on an Intranet or test server in someone's house. Most likely, however in the big wide world this will return the IP address of the proxy (transparent) that your user's ISP will be causing their request to go through.

Hope that helps, although you may have already had this answered successfully by now.

Or expressed as slightly better code:

Determine the client IP address

$ip = $HTTP_SERVER_VARS['HTTP_CLIENT_IP'];

If IP address is not yet set, try other proxy value

if ( $ip == "" || $ip == "unknown" ) $ip = $HTTP_SERVER_VARS['HTTP_X_FORWARDED_FOR'];

If IP address is still not set, try Remote Address

if ( $ip == "" || $ip == "unknown" ) $ip = $HTTP_SERVER_VARS['REMOTE_ADDR'];

Display the IP address

echo $ip;