使用PHP [duplicate]获取客户端IP地址

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这个问题已经有了答案:

How to get the client IP address in PHP? 22 answers
如何在PHP中获取客户端IP地址?22日答案

I want to get the client IP address who uses my website. I am using the PHP $_SERVER superglobal:

我想获得使用我的网站的客户端IP地址。我正在使用PHP $_SERVER superglobal:

$_SERVER['REMOTE_ADDR'];

But I see it can not give the correct IP address using this. I get my IP address and see it is different from my IP address and I can also see my IP address in some website like:

但是我看到它不能给出正确的IP地址。我收到我的IP地址，发现它和我的IP地址不同，我也可以在一些网站上看到我的IP地址，比如:

http://whatismyipaddress.com/

I paste the IP address which give my PHP function but this website shows no result about this. How does this problem come about and how can I get IP address of the client?

我粘贴的IP地址给我的PHP函数，但是这个网站没有显示任何结果。这个问题是如何产生的，我如何获得客户端的IP地址?

5 个解决方案

#1

282

The simplest way to get the visitor’s/client’s IP address is using the $_SERVER['REMOTE_ADDR'] or $_SERVER['REMOTE_HOST'] variables.

获取访问者/客户端IP地址的最简单方法是使用$_SERVER['REMOTE_ADDR']或$_SERVER['REMOTE_HOST']变量。

However, sometimes this does not return the correct IP address of the visitor, so we can use some other server variables to get the IP address.

但是，有时这并不返回访问者的正确IP地址，因此我们可以使用其他的服务器变量来获取IP地址。

The below both functions are equivalent with the difference only in how and from where the values are retrieved.

下面两个函数都是等价的，它们的区别只在于如何以及从何处检索值。

getenv() is used to get the value of an environment variable in PHP.

getenv()用于在PHP中获取环境变量的值。

// Function to get the client IP address
function get_client_ip() {
    $ipaddress = '';
    if (getenv('HTTP_CLIENT_IP'))
        $ipaddress = getenv('HTTP_CLIENT_IP');
    else 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');
    else
        $ipaddress = 'UNKNOWN';
    return $ipaddress;
}

$_SERVER is an array that contains server variables created by the web server.

$_SERVER是一个包含由web服务器创建的服务器变量的数组。

// Function to get the client IP address
function get_client_ip() {
    $ipaddress = '';
    if (isset($_SERVER['HTTP_CLIENT_IP']))
        $ipaddress = $_SERVER['HTTP_CLIENT_IP'];
    else if(isset($_SERVER['HTTP_X_FORWARDED_FOR']))
        $ipaddress = $_SERVER['HTTP_X_FORWARDED_FOR'];
    else if(isset($_SERVER['HTTP_X_FORWARDED']))
        $ipaddress = $_SERVER['HTTP_X_FORWARDED'];
    else if(isset($_SERVER['HTTP_FORWARDED_FOR']))
        $ipaddress = $_SERVER['HTTP_FORWARDED_FOR'];
    else if(isset($_SERVER['HTTP_FORWARDED']))
        $ipaddress = $_SERVER['HTTP_FORWARDED'];
    else if(isset($_SERVER['REMOTE_ADDR']))
        $ipaddress = $_SERVER['REMOTE_ADDR'];
    else
        $ipaddress = 'UNKNOWN';
    return $ipaddress;
}

#2

In PHP 5.3 or greater, you can get it like this:

在PHP 5.3或更高版本中，您可以得到如下内容:

$ip = getenv('HTTP_CLIENT_IP')?:
getenv('HTTP_X_FORWARDED_FOR')?:
getenv('HTTP_X_FORWARDED')?:
getenv('HTTP_FORWARDED_FOR')?:
getenv('HTTP_FORWARDED')?:
getenv('REMOTE_ADDR');

#3

    $ipaddress = '';
    if ($_SERVER['HTTP_CLIENT_IP'] != '127.0.0.1')
        $ipaddress = $_SERVER['HTTP_CLIENT_IP'];
    else if ($_SERVER['HTTP_X_FORWARDED_FOR'] != '127.0.0.1')
        $ipaddress = $_SERVER['HTTP_X_FORWARDED_FOR'];
    else if ($_SERVER['HTTP_X_FORWARDED'] != '127.0.0.1')
        $ipaddress = $_SERVER['HTTP_X_FORWARDED'];
    else if ($_SERVER['HTTP_FORWARDED_FOR'] != '127.0.0.1')
        $ipaddress = $_SERVER['HTTP_FORWARDED_FOR'];
    else if ($_SERVER['HTTP_FORWARDED'] != '127.0.0.1')
        $ipaddress = $_SERVER['HTTP_FORWARDED'];
    else if ($_SERVER['REMOTE_ADDR'] != '127.0.0.1')
        $ipaddress = $_SERVER['REMOTE_ADDR'];
    else
        $ipaddress = 'UNKNOWN';

#4

-9

Here is a function to get the IP address using a filter for local and LAN IP addresses:

这里是一个使用本地和局域网IP地址的过滤器获取IP地址的函数:

function get_IP_address()
{
    foreach (array('HTTP_CLIENT_IP',
                   'HTTP_X_FORWARDED_FOR',
                   'HTTP_X_FORWARDED',
                   'HTTP_X_CLUSTER_CLIENT_IP',
                   'HTTP_FORWARDED_FOR',
                   'HTTP_FORWARDED',
                   'REMOTE_ADDR') as $key){
        if (array_key_exists($key, $_SERVER) === true){
            foreach (explode(',', $_SERVER[$key]) as $IPaddress){
                $IPaddress = trim($IPaddress); // Just to be safe

                if (filter_var($IPaddress,
                               FILTER_VALIDATE_IP,
                               FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)
                    !== false) {

                    return $IPaddress;
                }
            }
        }
    }
}

问

#5

-11

It also works fine for internal IP addresses:

它也适用于内部IP地址:

 function get_client_ip()
 {
      $ipaddress = '';
      if (getenv('HTTP_CLIENT_IP'))
          $ipaddress = getenv('HTTP_CLIENT_IP');
      else 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');
      else
          $ipaddress = 'UNKNOWN';

      return $ipaddress;
 }

#1

282