如何使用PHP获取公共IP地址？ [英] How to get Public IP address using PHP?

问题描述

我需要使用PHP获取系统的公共IP地址。我尝试了以下功能：

I need to get Public IP address of the system using PHP. I tried the following function:

function get_client_ip() {
    $ipaddress = '';
    if(getenv('HTTP_X_FORWARDED_FOR'))
        $ipaddress = getenv('HTTP_X_FORWARDED_FOR');
    else if(getenv('HTTP_X_FORWARDED'))
        $ipaddress = getenv('HTTP_X_FORWARDED');
    else if(getenv('HTTP_FORWARDED_FOR'))
        $ipaddress = getenv('HTTP_FORWARDED_FOR');
    else if(getenv('HTTP_FORWARDED'))
       $ipaddress = getenv('HTTP_FORWARDED');
    else if(getenv('REMOTE_ADDR'))
        $ipaddress = getenv('REMOTE_ADDR');
    return $ipaddress;
}

但是，我只得到本地主机IP 127.0。 0.1 。我需要公共IP地址。 PHP中有哪些函数可以获取我从本网站获得的公共IP地址： http://www.whatismyip.com/

But, I got only the localhost IP 127.0.0.1. I am in need of Public IP address. What function is available in PHP to get my Public Ip address which I get from this site:http://www.whatismyip.com/

推荐答案

如果您在运行浏览器客户端的同一台计算机或本地LAN上运行Web服务器，则无法以此方式获取您的IP地址，您将始终获取本地IP地址。

It is not possible to get Your IP address on that way if you run web server on same machine or local LAN where you run your browser client, you will always get local IP address.

如果您仍希望从PHP脚本获取您的公共地址，则在与您的浏览器客户端在同一网络中运行的* nix服务器上，您可以获得它通过这样的命令：

If You still want to get Your public address from PHP script, on *nix servers which runs in same network as your browser client, you can get it via command like this:

$myPublicIP = trim(shell_exec("dig +short myip.opendns.com @resolver1.opendns.com"));
echo "My public IP: ".$myPublicIP;

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