php 获取ip地址方法

 1 function getIP() {
 2     $ip="";
 3     if(!empty($_SERVER['HTTP_CLIENT_IP'])){
 4        $myip = $_SERVER['HTTP_CLIENT_IP'];
 5     }else if(!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){
 6        $myip = $_SERVER['HTTP_X_FORWARDED_FOR'];
 7     }else{
 8        $myip= $_SERVER['REMOTE_ADDR'];
 9     }
10     return $myip;
11 ?>