如何在php中获取客户端的公共ip

Question

我必须在php中获取远程系统的公共IP。 我试过了

$_SERVER['REMOTE_ADDR']

getenv('REMOTE_ADDR');

但总是返回私有IP。帮助解决它。

Answer 1

试试这个：

$ip = !empty($_SERVER['HTTP_CLIENT_IP']) ? $_SERVER['HTTP_CLIENT_IP'] : (!empty($_SERVER['HTTP_X_FORWARDED_FOR']) ? $_SERVER['HTTP_X_FORWARDED_FOR'] : $_SERVER['REMOTE_ADDR']);

警告：您应该对其进行扩展并进行清理，因为标题可以轻松操作。

Answer 2

private function getIP()
{
    $client  = @$_SERVER['HTTP_CLIENT_IP'];
    $forward = @$_SERVER['HTTP_X_FORWARDED_FOR'];
    $remote  = $_SERVER['REMOTE_ADDR'];

    if(filter_var($client, FILTER_VALIDATE_IP))
    {
        $ip = $client;
    }
    elseif(filter_var($forward, FILTER_VALIDATE_IP))
    {
        $ip = $forward;
    }
    else
    {
        $ip = $remote;
    }

    return $ip;
}
echo getIP();