php 使用PHP获取客户端IP地址
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Get the client IP address using PHP
提问by user1752627
I want to get the client IP address who uses my website. I am using the PHP $_SERVERsuperglobal:
我想获取使用我网站的客户端 IP 地址。我正在使用 PHP$_SERVER超全局变量：
$_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:
但我看到它无法使用此提供正确的 IP 地址。我得到了我的 IP 地址，发现它与我的 IP 地址不同，我还可以在某些网站上看到我的 IP 地址，例如：
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?
我粘贴了提供 PHP 功能的 IP 地址，但该网站没有显示任何结果。这个问题是怎么产生的，如何获取客户端的IP地址？
回答by Shiv
The simplest way to get the visitor's/client's IP addressis using the $_SERVER['REMOTE_ADDR']or $_SERVER['REMOTE_HOST']variables.
获取访问者/客户IP 地址的最简单方法是使用$_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，有时这不会返回访问者的正确 IP 地址，因此我们可以使用其他一些服务器变量来获取 IP 地址。
The below both functions are equivalent with the difference only in how and from where the values are retrieved.
下面的两个函数是等效的，区别仅在于检索值的方式和位置。
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;
}
回答by Michael
In PHP 5.3 or greater, you can get it like this:
在 PHP 5.3 或更高版本中，您可以这样获得：
$ip = getenv('HTTP_CLIENT_IP')?:
getenv('HTTP_X_FORWARDED_FOR')?:
getenv('HTTP_X_FORWARDED')?:
getenv('HTTP_FORWARDED_FOR')?:
getenv('HTTP_FORWARDED')?:
getenv('REMOTE_ADDR');
回答by Rene Berwanger
$ipaddress = '';
if ($_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';
回答by rohitarora
Here is a function to get the IP address using a filter for local and LAN IP addresses:
这是一个使用本地和 LAN IP 地址过滤器获取 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;
}
}
}
}
}
回答by user3012239
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;
}
