PHP - Professional Script for Get Remote IP Address

1. <?php          
2. function getRemoteIPAddress(){
3.     $ip = isset($_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : '';
4.     return $ip;
5. }
6.  
7. /* If your visitor comes from proxy server you have use another function
8. to get a real IP address: */
9. function getRealIPAddress(){   
10.     if(!empty($_SERVER['HTTP_CLIENT_IP'])){
11.         //check ip from share internet
12.         $ip = $_SERVER['HTTP_CLIENT_IP'];
13.     }else if(!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){
14.         //to check ip is pass from proxy
15.         $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
16.     }else{
17.         $ip = $_SERVER['REMOTE_ADDR'];
18.     }
19.     return $ip;
20. }
21. ?>