本文主要介绍PHP如何获取用户的IP。

方法一

$ip = $_SERVER["REMOTE_ADDR"];

方法二

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 = "无法获取！"; 
    }
    return $ip;
}

方法三

$ip = !empty($_SERVER["HTTP_VIA"]) && !empty($_SERVER["HTTP_X_FORWARDED_FOR"]) ? $_SERVER["HTTP_X_FORWARDED_FOR"] : $_SERVER["REMOTE_ADDR"];