https://blog.csdn.net/zhezhebie/article/details/79097133
1、安装：
composer require geoip2/geoip2:~2.0
2、用法:
<?php
require_once 'vendor/autoload.php';
use GeoIp2\Database\Reader;
// This creates the Reader object, which should be reused across
// lookups.
$reader = new Reader('/usr/local/share/GeoIP/GeoIP2-City.mmdb');
// Replace "city" with the appropriate method for your database, e.g.,
// "country".
$record = $reader->city('128.101.101.101');
print($record->country->isoCode . "\n"); // 'US'
print($record->country->name . "\n"); // 'United States'
print($record->country->names['zh-CN'] . "\n"); // '美国'
print($record->mostSpecificSubdivision->name . "\n"); // 'Minnesota'
print($record->mostSpecificSubdivision->isoCode . "\n"); // 'MN'
print($record->city->name . "\n"); // 'Minneapolis'
print($record->postal->code . "\n"); // '55455'
print($record->location->latitude . "\n"); // 44.9733
print($record->location->longitude . "\n"); // -93.2323
