US
United States
美国
Virginia
VA
Ashburn
20149
39.0469
-77.4903
18.97.0.0/18
<h2>IP:</h2><pre>18.97.14.87</pre><h2>JSON:</h2><code><?php
require_once 'vendor/autoload.php';
use GeoIp2\Database\Reader;

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 IPs passing through proxies

    if (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))
    {

        // check if multiple ips 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 since all else failed

    return $_SERVER['REMOTE_ADDR'];
}

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

    // generate ipv4 network address

    $ip = ip2long($ip);

    // if the ip is set and not equivalent to 255.255.255.255

    if ($ip !== false && $ip !== - 1)
    {

        // make sure to get unsigned long representation of ip
        // 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;
}

// This creates the Reader object, which should be reused across
// lookups.
$reader = new Reader('./GeoLite2-City.mmdb');

// Replace "city" with the appropriate method for your database, e.g.,
// "country".

if (!empty($_REQUEST["ip"]) && filter_var($_REQUEST["ip"], FILTER_VALIDATE_IP)) {
    $get_ip_address_ip = $_REQUEST["ip"];
}else{
    $get_ip_address_ip = get_ip_address();
}

$record = $reader->city($get_ip_address_ip);

// Prevent caching
header('Cache-Control: no-cache, must-revalidate');
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');

// Set the content type
header('Content-Type: application/json; charset=utf-8');

// Encode and output the data
echo json_encode($record);</code><h2>Array:</h2><pre style="background:#dedede;">NULL
</pre>["city"]