We all know that getting the IP address of the user is a quite easy job in PHP, even in any programming language. But are you sure that you are getting the real IP of the user?
In php, $_SERVER['REMOTE_ADDR'] is used to get the IP address of the user. But what happen if any user from USA access you site via proxy server of Australia. In this case $_SERVER['REMOTE_ADDR'] will return ip address of the Australia rather than ip address of USA.
Now let’s see the code snippet:
//check for ip from share internet
$ip = $_SERVER["HTTP_CLIENT_IP"];
// Check for the Proxy User
$ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
$ip = $_SERVER["REMOTE_ADDR"];
// This will print user's real IP Address
// does't matter if user using proxy or not.
Note: It is recommended to use above trick to track your user.