GeoIP2-php/README.md

# GeoIP2 PHP API #

## Description ##

This package provides an API for the GeoIP2 [web services]
(http://dev.maxmind.com/geoip/geoip2/web-services) and [databases]
(http://dev.maxmind.com/geoip/geoip2/downloadable). The API also works with
the free [GeoLite2 databases](http://dev.maxmind.com/geoip/geoip2/geolite2/).

## Install via Composer ##

We recommend installing this package with [Composer](http://getcomposer.org/).

### Download Composer ###

To download Composer, run in the root directory of your project:

```bash
curl -sS https://getcomposer.org/installer | php
```

You should now have the file `composer.phar` in your project directory.

### Install Dependencies ###

Run in your project root:

```
php composer.phar require geoip2/geoip2:~2.0
```

You should now have the files `composer.json` and `composer.lock` as well as
the directory `vendor` in your project directory. If you use a version control
system, `composer.json` should be added to it.

### Require Autoloader ###

After installing the dependencies, you need to require the Composer autoloader
from your code:

```php
require 'vendor/autoload.php';
```

## Install via Phar ##

Although we strongly recommend using Composer, we also provide a
[phar archive](http://php.net/manual/en/book.phar.php) containing all of the
dependencies for GeoIP2. Our latest phar archive is available on
[our releases page](https://github.com/maxmind/GeoIP2-php/releases).

To use the archive, just require it from your script:

```php
require 'geoip2.phar';
```

## Optional C Extension ##

The [MaxMind DB API](https://github.com/maxmind/MaxMind-DB-Reader-php)
includes an optional C extension that you may install to dramatically increase
the performance of lookups in GeoIP2 or GeoLite2 databases. To install, please
follow the instructions included with that API.

The extension has no effect on web-service lookups.

## Database Reader ##

### Usage ###

To use this API, you must create a new `\GeoIp2\Database\Reader` object with
the path to the database file as the first argument to the constructor. You
may then call the method corresponding to the database you are using.

If the lookup succeeds, the method call will return a model class for the
record in the database. This model in turn contains multiple container
classes for the different parts of the data such as the city in which the
IP address is located.

If the record is not found, a `\GeoIp2\Exception\AddressNotFoundException`
is thrown. If the database is invalid or corrupt, a
`\MaxMind\Db\InvalidDatabaseException` will be thrown.

See the API documentation for more details.

### City Example ###

```php
<?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

```

### Connection-Type Example ###

```php
<?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-Connection-Type.mmdb');

$record = $reader->connectionType('128.101.101.101');

print($record->connectionType . "\n"); // 'Corporate'
print($record->ipAddress . "\n"); // '128.101.101.101'

```

### Domain Example ###

```php
<?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-Domain.mmdb');

$record = $reader->domain('128.101.101.101');

print($record->domain . "\n"); // 'umn.edu'
print($record->ipAddress . "\n"); // '128.101.101.101'

```

### ISP Example ###

```php
<?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-ISP.mmdb');

$record = $reader->isp('128.101.101.101');

print($record->autonomousSystemNumber . "\n"); // 217
print($record->autonomousSystemOrganization . "\n"); // 'University of Minnesota'
print($record->isp . "\n"); // 'University of Minnesota'
print($record->organization . "\n"); // 'University of Minnesota'

print($record->ipAddress . "\n"); // '128.101.101.101'

```

## Web Service Client ##

### Usage ###

To use this API, you must create a new `\GeoIp2\WebService\Client`
object with your `$userId` and `$licenseKey`, then you call the method
corresponding to a specific end point, passing it the IP address you want to
look up.

If the request succeeds, the method call will return a model class for the end
point you called. This model in turn contains multiple record classes, each of
which represents part of the data returned by the web service.

If there is an error, a structured exception is thrown.

See the API documentation for more details.

### Example ###

```php
<?php
require_once 'vendor/autoload.php';
use GeoIp2\WebService\Client;

// This creates a Client object that can be reused across requests.
// Replace "42" with your user ID and "license_key" with your license
// key.
$client = new Client(42, 'abcdef123456');

// Replace "city" with the method corresponding to the web service that
// you are using, e.g., "country", "insights".
$record = $client->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

```

### What data is returned? ###

While many of the end points return the same basic records, the attributes
which can be populated vary between end points. In addition, while an end
point may offer a particular piece of data, MaxMind does not always have every
piece of data for any given IP address.

Because of these factors, it is possible for any end point to return a record
where some or all of the attributes are unpopulated.

See the
[GeoIP2 Precision web service docs](http://dev.maxmind.com/geoip/geoip2/web-services)
for details on what data each end point may return.

The only piece of data which is always returned is the `ipAddress`
attribute in the `GeoIp2\Record\Traits` record.

## Integration with GeoNames ##

[GeoNames](http://www.geonames.org/) offers web services and downloadable
databases with data on geographical features around the world, including
populated places. They offer both free and paid premium data. Each
feature is unique identified by a `geonameId`, which is an integer.

Many of the records returned by the GeoIP2 web services and databases
include a `geonameId` property. This is the ID of a geographical feature
(city, region, country, etc.) in the GeoNames database.

Some of the data that MaxMind provides is also sourced from GeoNames. We
source things like place names, ISO codes, and other similar data from
the GeoNames premium data set.

## Reporting data problems ##

If the problem you find is that an IP address is incorrectly mapped,
please
[submit your correction to MaxMind](http://www.maxmind.com/en/correction).

If you find some other sort of mistake, like an incorrect spelling,
please check the [GeoNames site](http://www.geonames.org/) first. Once
you've searched for a place and found it on the GeoNames map view, there
are a number of links you can use to correct data ("move", "edit",
"alternate names", etc.). Once the correction is part of the GeoNames
data set, it will be automatically incorporated into future MaxMind
releases.

If you are a paying MaxMind customer and you're not sure where to submit
a correction, please
[contact MaxMind support](http://www.maxmind.com/en/support) for help.

## Other Support ##

Please report all issues with this code using the
[GitHub issue tracker](https://github.com/maxmind/GeoIP2-php/issues).

If you are having an issue with a MaxMind service that is not specific
to the client API, please see
[our support page](http://www.maxmind.com/en/support).

## Requirements  ##

This code requires PHP 5.3 or greater. Older versions of PHP are not
supported.

This library works and is tested with HHVM.

This library also relies on the [Guzzle HTTP client](http://guzzlephp.org/)
and the [MaxMind DB Reader](https://github.com/maxmind/MaxMind-DB-Reader-php).

If you are using PHP 5.3 with an autoloader besides Composer, you must load
`JsonSerializable.php` in the `compat` directory.

## Contributing ##

Patches and pull requests are encouraged. All code should follow the
PSR-2 style guidelines. Please include unit tests whenever possible.

## Versioning ##

The GeoIP2 PHP API uses [Semantic Versioning](http://semver.org/).

## Copyright and License ##

This software is Copyright (c) 2014 by MaxMind, Inc.

This is free software, licensed under the Apache License, Version 2.0.