If you want to log what a user is doing, or have any other reason to get his ip using HTTP_CLIENT_IP to get the remote user IP is not at all enough, if the client is connecting through a proxy (for an example your site is configured behind an apache_mod_proxy) you should also test for HTTP_X_FORWARDED_FOR and fall back on REMOTE_ADDR or you might always be getting the proxie's IP.
<?php
function getIP() {
$ip;
if (
getenv("HTTP_CLIENT_IP")) $ip = getenv("HTTP_CLIENT_IP");
else if(getenv("HTTP_X_FORWARDED_FOR")) $ip = getenv("HTTP_X_FORWARDED_FOR");
else if(getenv("REMOTE_ADDR")) $ip = getenv("REMOTE_ADDR");
else $ip = "UNKNOWN";
return
$ip;
}
?>http://dev.af83.com/trackback/10
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