如何使用PHP获取客户端IP？

Question

我有一个PHP的网页，我试图获取客户端IP，但我得到的是服务器GATEWAY IP地址（192.168.0.1）。

这就是我在办公室所拥有的：

ISP ---> ISP路由器--->我的路由器（192.168.0.1）---->（192.168.0.2）我的服务器。

我试过这一切，但是我无法获得真正的ip，只有SERVER GATEWAY ip。

$_SERVER['HTTP_X_FORWARDED_FOR']
$_SERVER['HTTP_CLIENT_IP']
$_SERVER['HTTP_X_REAL_IP']
$_SERVER['GATEWAY_INTERFACE']
$_SERVER['SERVER_ADDR']
$_SERVER['SERVER_NAME']
$_SERVER['SERVER_SOFTWARE']
$_SERVER['SERVER_PROTOCOL']
$_SERVER['REQUEST_METHOD']
$_SERVER['REQUEST_TIME']
$_SERVER['QUERY_STRING']
$_SERVER['DOCUMENT_ROOT']
$_SERVER['HTTP_ACCEPT']
$_SERVER['HTTP_ACCEPT_CHARSET']
$_SERVER['HTTP_ACCEPT_ENCODING']
$_SERVER['HTTP_ACCEPT_LANGUAGE']
$_SERVER['HTTP_CONNECTION']
$_SERVER['HTTP_HOST']
$_SERVER['HTTP_REFERER']
$_SERVER['HTTP_USER_AGENT']
$_SERVER['HTTPS']
$_SERVER['REMOTE_ADDR']
$_SERVER['REMOTE_HOST']
$_SERVER['REMOTE_PORT']
$_SERVER['SCRIPT_FILENAME']
$_SERVER['SERVER_ADMIN']
$_SERVER['SERVER_PORT'] 
$_SERVER['SERVER_SIGNATURE']
$_SERVER['PATH_TRANSLATED']
$_SERVER['SCRIPT_NAME']
$_SERVER['REQUEST_URI']
$_SERVER['PHP_AUTH_DIGEST']
$_SERVER['PHP_AUTH_USER'] 
$_SERVER['PHP_AUTH_PW']
$_SERVER['AUTH_TYPE']

以下变量是“未定义的”：

-HTTP_X_FORWARDED_FOR
-HTTP_CLIENT_IP
-HTTP_X_REAL_IP
-HTTPS
-REMOTE_HOST
-PATH_TRANSLATED
-PHP_AUTH_DIGEST
-PHP_AUTH_USER
-PHP_AUTH_PW
-AUTH_TYPE

编辑：尝试“var_dump（$ _ SERVER）”，找不到客户端的IP地址:( 编辑2：我谷歌搜索了一下，我“找到了答案”。用户Martin Hohenberg所说的是对的。在NAT进程中，Headers被破坏，因此我的服务器无法读取原始IP地址。目前，我不知道这个问题的可行解决方案，而无需将服务器移到前面。

Answer 1

如果您从运行服务器的机器发出请求，那么$_SERVER['REMOTE_ADDR']显然会包含您自己的IP地址，即192.168.0.1

Answer 2

Similar question

尝试

echo $_SERVER['REMOTE_ADDR'];

Read more

function getUserIpAddr()
{
    if (!empty($_SERVER['HTTP_CLIENT_IP'])) //if from shared
    {
        return $_SERVER['HTTP_CLIENT_IP'];
    }
    else if (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))   //if from a proxy
    {
        return $_SERVER['HTTP_X_FORWARDED_FOR'];
    }
    else
    {
        return $_SERVER['REMOTE_ADDR'];
    }
}

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