GeoLite2の動作確認用のコード、アクセス元の国情報を取得できます。

GeoLite2-country-example-test.php

<?php
require_once '/usr/share/php/GeoIP2-php/vendor/autoload.php';
use GeoIp2\Database\Reader;

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

// Replace "city" with the appropriate method for your database, e.g.,
// "country".
$record = $reader->country('128.101.101.101');

print($record->country->isoCode . "\n"); // 'US'
print($record->country->name . "\n"); // 'United States'
print($record->country->names['ja'] . "\n"); // 'アメリカ合衆国'
?>