PHP Get User IP code implementation

PHP Get User IP code implementation

Getting a client User IP is often required in the Web site, such as:

1. Login IP: You can know in time whether your account is stolen;

2. Voting: can only do one vote per IP to prevent the swipe ticket;

3. Statistics: Statistical user sources, this is an indispensable part of the data analysis;

4. Other.

So it is important to get the client IP correctly, and here is the PHP code that gets the IP in daily use:

/**
* Get customer IP Address
* @return $ip
*/
    function GetIP () {
    if (!empty ($_server["Http_client_ip")) {
  $ip = $_server["Http_client_ip"];
}
ElseIf (!empty ($_server["Http_x_forwarded_for")) {
  $ip = $_server["Http_x_forwarded_for"];
}
ElseIf (!empty ($_server["REMOTE_ADDR")) {
  $ip = $_server["REMOTE_ADDR"];
}
else{
  $ip = "127.0.0.1";
}
return $IP;
    }   

This is just to provide reference, if you have any good way to communicate with the message!

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