What is my IP address? - Tool

Oct 05, 2017 PHP Tool

A small tool to check What is my IP address?. Plus some MaxMind GeoIP data like city, country or longitude and latitude of an IP.

What is my IP address?

Your IP is:

The geographical location of an IP

The following form shows the geographical location of an IP.

GeoIP location in PHP

Here just a short explaination of the PHP code behind that tool.

Fetch client IP address in PHP

A very common place for the client IP address is the server variable REMOTE_ADDR.

$ip = $_SERVER['REMOTE_ADDR'];

Validate an IP in PHP

I would recommend to validate the IP via filter_var.

if (filter_var($ip, FILTER_VALIDATE_IP)) {
    // $ip is an IP
    if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) {
        // $ip is an IPV4
    }
    if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
        // $ip is an IPV6
    }
}

Install maxmind-db/reader

Install maxmind-db/reader via Composer.

composer require maxmind-db/reader
Using version ^1.1 for maxmind-db/reader
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 1 install, 0 updates, 0 removals
  - Installing maxmind-db/reader (v1.1.3): Cloning 7eeccf61b0
Writing lock file
Generating autoload files

Download MaxMind Database

You can download free GeoIP databases at MaxMind.

Minimal GeoIP PHP example

A minimal exmaple of the MaxMind database.

$dbFilePath = '/path_to/GeoLite2-City.mmdb';
$maxMindReader = new MaxMind\Db\Reader($dbFilePath);
print_r($maxMindReader->get($ip));

With the following result.

Array
(
    [city] => Array
        (
            [geoname_id] => 2950159
            [names] => Array
                (
                    [de] => Berlin
                    [en] => Berlin
                    [es] => Berlín
                    [fr] => Berlin
                    [ja] => ベルリン
                    [pt-BR] => Berlim
                    [ru] => Берлин
                    [zh-CN] => 柏林
                )

        )

    [continent] => Array
        (
            [code] => EU
            [geoname_id] => 6255148
            [names] => Array
                (
                    [de] => Europa
                    [en] => Europe
                    [es] => Europa
                    [fr] => Europe
                    [ja] => ヨーロッパ
                    [pt-BR] => Europa
                    [ru] => Европа
                    [zh-CN] => 欧洲
                )

        )

    [country] => Array
        (
            [geoname_id] => 2921044
            [iso_code] => DE
            [names] => Array
                (
                    [de] => Deutschland
                    [en] => Germany
                    [es] => Alemania
                    [fr] => Allemagne
                    [ja] => ドイツ連邦共和国
                    [pt-BR] => Alemanha
                    [ru] => Германия
                    [zh-CN] => 德国
                )

        )

    [location] => Array
        (
            [accuracy_radius] => 20
            [latitude] => 52.5167
            [longitude] => 13.4
            [time_zone] => Europe/Berlin
        )

    [postal] => Array
        (
            [code] => 12529
        )

    [registered_country] => Array
        (
            [geoname_id] => 2921044
            [iso_code] => DE
            [names] => Array
                (
                    [de] => Deutschland
                    [en] => Germany
                    [es] => Alemania
                    [fr] => Allemagne
                    [ja] => ドイツ連邦共和国
                    [pt-BR] => Alemanha
                    [ru] => Германия
                    [zh-CN] => 德国
                )

        )

    [subdivisions] => Array
        (
            [0] => Array
                (
                    [geoname_id] => 2950157
                    [iso_code] => BE
                    [names] => Array
                        (
                            [de] => Berlin
                            [en] => Land Berlin
                            [es] => Berlín
                            [fr] => Berlin
                            [ja] => ベルリン
                            [pt-BR] => Berlim
                            [ru] => Берлин
                            [zh-CN] => 柏林
                        )

                )

        )

)