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2023-03-27 05:00:05

如何在PHP中获取客户端IP地址

如何使用PHP获取客户端IP地址?

我想通过他/她的IP地址登录到我的网站的用户的记录。

当前回答

我使用了其他答案之一，并添加了一些额外的东西，如CloudFlare代理和NGINX代理检测。

/**
 * Gets, validates and returns the connecting client's IP
 */
function getClientIP(){

    // Get real visitor IP behind CloudFlare network
    if (!empty($_SERVER["HTTP_CF_CONNECTING_IP"]) && validateIP($_SERVER['HTTP_CF_CONNECTING_IP'])) {
        return $_SERVER["HTTP_CF_CONNECTING_IP"];
    }

    // Get real visitor IP behind NGINX proxy - https://easyengine.io/tutorials/nginx/forwarding-visitors-real-ip/
    if (!empty($_SERVER["HTTP_X_REAL_IP"]) && validateIP($_SERVER['HTTP_X_REAL_IP'])) {
        return $_SERVER["HTTP_X_REAL_IP"];
    }

    // Check for shared Internet/ISP IP
    if (!empty($_SERVER['HTTP_CLIENT_IP']) && validateIP($_SERVER['HTTP_CLIENT_IP'])) {
        return $_SERVER['HTTP_CLIENT_IP'];
    }

    // Check for IP addresses passing through proxies
    if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {

        // Check if multiple IP addresses exist in var
        if (strpos($_SERVER['HTTP_X_FORWARDED_FOR'], ',') !== false) {
            $iplist = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
            foreach ($iplist as $ip) {
                if (validateIP($ip))
                    return $ip;
            }
        }
        else {
            if (validateIP($_SERVER['HTTP_X_FORWARDED_FOR']))
                return $_SERVER['HTTP_X_FORWARDED_FOR'];
        }
    }

    if (!empty($_SERVER['HTTP_X_FORWARDED']) && validateIP($_SERVER['HTTP_X_FORWARDED']))
        return $_SERVER['HTTP_X_FORWARDED'];

    if (!empty($_SERVER['HTTP_X_CLUSTER_CLIENT_IP']) && validateIP($_SERVER['HTTP_X_CLUSTER_CLIENT_IP']))
        return $_SERVER['HTTP_X_CLUSTER_CLIENT_IP'];

    if (!empty($_SERVER['HTTP_FORWARDED_FOR']) && validateIP($_SERVER['HTTP_FORWARDED_FOR']))
        return $_SERVER['HTTP_FORWARDED_FOR'];

    if (!empty($_SERVER['HTTP_FORWARDED']) && validateIP($_SERVER['HTTP_FORWARDED']))
        return $_SERVER['HTTP_FORWARDED'];

    // Return unreliable IP address since all else failed
    return $_SERVER['REMOTE_ADDR'];
}

/**
 * Ensures an IP address is both a valid IP address and does not fall within
 * a private network range.
 */
function validateIP($ip) {

    if (strtolower($ip) === 'unknown')
        return false;

    // Generate IPv4 network address
    $ip = ip2long($ip);

    // Do additional filtering on IP
    if(!filter_var($ip, FILTER_VALIDATE_IP))
        return false;

    // If the IP address is set and not equivalent to 255.255.255.255
    if ($ip !== false && $ip !== -1) {

        // Make sure to get unsigned long representation of IP address
        // due to discrepancies between 32 and 64 bit OSes and
        // signed numbers (ints default to signed in PHP)
        $ip = sprintf('%u', $ip);

        // Do private network range checking
        if ($ip >= 0 && $ip <= 50331647)
            return false;
        if ($ip >= 167772160 && $ip <= 184549375)
            return false;
        if ($ip >= 2130706432 && $ip <= 2147483647)
            return false;
        if ($ip >= 2851995648 && $ip <= 2852061183)
            return false;
        if ($ip >= 2886729728 && $ip <= 2887778303)
            return false;
        if ($ip >= 3221225984 && $ip <= 3221226239)
            return false;
        if ($ip >= 3232235520 && $ip <= 3232301055)
            return false;
        if ($ip >= 4294967040)
            return false;
    }
    return true;
}

我在生产节点中使用它，它工作得很好。由于大部分代码来自这里，我已经在GNU @ https://github.com/d3vdigital/whatsmyip-node下发布了一个节点

2022-10-15 13:27:23

其他回答

它应该包含在$_SERVER['REMOTE_ADDR']变量中。

2008-09-11 03:38:23

以下是我发现的最先进的方法，我在过去已经尝试过其他一些方法。确保获得访问者的IP地址是有效的(但请注意，任何黑客都很容易伪造IP地址)。

function get_ip_address() {

    // Check for shared Internet/ISP IP
    if (!empty($_SERVER['HTTP_CLIENT_IP']) && validate_ip($_SERVER['HTTP_CLIENT_IP'])) {
        return $_SERVER['HTTP_CLIENT_IP'];
    }

    // Check for IP addresses passing through proxies
    if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {

        // Check if multiple IP addresses exist in var
        if (strpos($_SERVER['HTTP_X_FORWARDED_FOR'], ',') !== false) {
            $iplist = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
            foreach ($iplist as $ip) {
                if (validate_ip($ip))
                    return $ip;
            }
        }
        else {
            if (validate_ip($_SERVER['HTTP_X_FORWARDED_FOR']))
                return $_SERVER['HTTP_X_FORWARDED_FOR'];
        }
    }
    if (!empty($_SERVER['HTTP_X_FORWARDED']) && validate_ip($_SERVER['HTTP_X_FORWARDED']))
        return $_SERVER['HTTP_X_FORWARDED'];
    if (!empty($_SERVER['HTTP_X_CLUSTER_CLIENT_IP']) && validate_ip($_SERVER['HTTP_X_CLUSTER_CLIENT_IP']))
        return $_SERVER['HTTP_X_CLUSTER_CLIENT_IP'];
    if (!empty($_SERVER['HTTP_FORWARDED_FOR']) && validate_ip($_SERVER['HTTP_FORWARDED_FOR']))
        return $_SERVER['HTTP_FORWARDED_FOR'];
    if (!empty($_SERVER['HTTP_FORWARDED']) && validate_ip($_SERVER['HTTP_FORWARDED']))
        return $_SERVER['HTTP_FORWARDED'];

    // Return unreliable IP address since all else failed
    return $_SERVER['REMOTE_ADDR'];
}

/**
 * Ensures an IP address is both a valid IP address and does not fall within
 * a private network range.
 */
function validate_ip($ip) {

    if (strtolower($ip) === 'unknown')
        return false;

    // Generate IPv4 network address
    $ip = ip2long($ip);

    // If the IP address is set and not equivalent to 255.255.255.255
    if ($ip !== false && $ip !== -1) {
        // Make sure to get unsigned long representation of IP address
        // due to discrepancies between 32 and 64 bit OSes and
        // signed numbers (ints default to signed in PHP)
        $ip = sprintf('%u', $ip);

        // Do private network range checking
        if ($ip >= 0 && $ip <= 50331647)
            return false;
        if ($ip >= 167772160 && $ip <= 184549375)
            return false;
        if ($ip >= 2130706432 && $ip <= 2147483647)
            return false;
        if ($ip >= 2851995648 && $ip <= 2852061183)
            return false;
        if ($ip >= 2886729728 && $ip <= 2887778303)
            return false;
        if ($ip >= 3221225984 && $ip <= 3221226239)
            return false;
        if ($ip >= 3232235520 && $ip <= 3232301055)
            return false;
        if ($ip >= 4294967040)
            return false;
    }
    return true;
}
2015-01-29 14:37:28

你可以使用下面的函数

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;
}
2022-07-05 09:15:56

如果您不喜欢使用If -else/switch语句，那么下面的解决方案适合您。

function get_client_ip()
{
    $fields = array(
        'HTTP_CF_CONNECTING_IP',
        'HTTP_X_SUCURI_CLIENTIP',
        'HTTP_CLIENT_IP',
        'HTTP_X_FORWARDED_FOR',
        'HTTP_X_FORWARDED',
        'HTTP_FORWARDED_FOR',
        'HTTP_FORWARDED',
        'REMOTE_ADDR',
        // more custom fields
    );

    foreach ($fields as $ip_field) {
        if (!empty($_SERVER[$ip_field])) {
            return $_SERVER[$ip_field];
        }
    }

    return null;
}
2022-06-29 01:59:26

其中之一:

    $ip = $_SERVER['REMOTE_ADDR'];
    $ip = $_SERVER['HTTP_CLIENT_IP'];
    $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
    $ip = $_SERVER['HTTP_X_FORWARDED'];
    $ip = $_SERVER['HTTP_FORWARDED_FOR'];
    $ip = $_SERVER['HTTP_FORWARDED'];
2019-06-11 10:14:08

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