获取用户计算机的正确IP地址

Question

When I check ip from ipconfig on local host. I am getting ip like this 100.78.80.xxx (US) , when I check IP on some website like ip2location/ip2nation , I am getting IP like this 115.245.20.xxx (IN) . I want to know why?

I want to get the user IP address to get the country name. I am using $_SERVER['REMOTE_ADDR'] to get the user IP address and will get the country name.

Does it get the correct IP of user machine to get the correct country code?

Answer 1

它获取用户网关或路由器的IP地址，当用户使用路由器时，用户的IP地址可能会有所不同，但是这个IP足以获得该县，它将为您提供正确的国家/地区。

Answer 2

Luthando Loot is right. The answer is present here: Getting visitors country from their IP

However, it is located in answer but not in question.

if (isset($_SERVER['HTTP_CLIENT_IP']))
{
    $real_ip_adress = $_SERVER['HTTP_CLIENT_IP'];
}

if (isset($_SERVER['HTTP_X_FORWARDED_FOR']))
{
    $real_ip_adress = $_SERVER['HTTP_X_FORWARDED_FOR'];
}
else
{
    $real_ip_adress = $_SERVER['REMOTE_ADDR'];
}

You should check this values in such order:

HTTP_CLIENT_IP
HTTP_X_FORWARDED_FOR
REMOTE_ADDR

It doesn't mean that you will precisely get his IP address. It can be easily hidden by anonymizer, proxy, ISP etc. However, it is much more efficient than loooking at REMOTE_ADDR only.

There are some other values in SERVER array. Actually, this question is a duplicate to this:
What is the most accurate way to retrieve a user's correct IP address in PHP?