Geocoder

Geocoder is a library which helps you build geo-aware applications. It provides an abstraction layer for geocoding manipulations. The library is split in two parts: HttpAdapter and Provider and is really extensible.

HttpAdapters

HttpAdapters are responsible to get data from remote APIs.

Currently, there are the following adapters:

BuzzHttpAdapter to use Buzz, a lightweight PHP 5.3 library for issuing HTTP requests;
CurlHttpAdapter to use cURL;
GuzzleHttpAdapter to use Guzzle, PHP 5.3+ HTTP client and framework for building RESTful web service clients;
SocketHttpAdapter to use a socket;
ZendHttpAdapter to use Zend Http Client.

Providers

Providers contain the logic to extract useful information.

Currently, there are many providers for the following APIs:

FreeGeoIp as IP-Based geocoding provider;
HostIp as IP-Based geocoding provider;
IpInfoDB as IP-Based geocoding provider (city precision);
Google Maps as Address-Based geocoding and reverse geocoding provider;
Google Maps for Business as Address-Based geocoding and reverse geocoding provider;
Bing Maps as Address-Based geocoding and reverse geocoding provider;
OpenStreetMaps as Address-Based geocoding and reverse geocoding provider;
CloudMade as Address-Based geocoding and reverse geocoding provider;
Geoip, the PHP extension, as IP-Based geocoding provider;
ChainProvider is a special provider that takes a list of providers and iterates over this list to get information;
MapQuest as Address-Based geocoding and reverse geocoding provider;
OIORest as very accurate Address-Based geocoding and reverse geocoding provider (exclusively in Denmark);
GeoCoder.ca as Address-Based geocoding and reverse geocoding provider (exclusively in USA & Canada);
GeoCoder.us as Address-Based geocoding provider (exclusively in USA);
IGN OpenLS as Address-Based geocoding provider (exclusively in France);
DataScienceToolkit as IP-Based geocoding provider or an Address-Based provider (exclusively in USA & Canada);
Yandex as Address-Based geocoding and reverse geocoding provider;
GeoPlugin as IP-Based geocoding provider;
GeoIPs as IP-Based geocoding provider;
MaxMind web service as IP-Based geocoding provider (City/ISP/Org and Omni services);
MaxMind binary file as IP-Based geocoding provider;
Geonames as Place-Based geocoding and reverse geocoding provider;
IpGeoBase as IP-Based geocoding provider (very accurate in Russia);
Baidu as Address-Based geocoding and reverse geocoding provider (exclusively in China);
TomTom as Address-Based geocoding and reverse geocoding provider;
ArcGIS Online as Address-Based geocoding and reverse geocoding provider.

Installation

The recommended way to install Geocoder is through composer.

Just create a composer.json file for your project:

{
    "require": {
        "willdurand/geocoder": "*"
    }
}

And run these two commands to install it:

$ wget http://getcomposer.org/composer.phar
$ php composer.phar install

Now you can add the autoloader, and you will have access to the library:

<?php

require 'vendor/autoload.php';

If you don't use either Composer or a ClassLoader in your application, just require the provided autoloader:

<?php

require_once 'src/autoload.php';

You're done.

Usage

First, you need an adapter to query an API:

<?php

$adapter  = new \Geocoder\HttpAdapter\BuzzHttpAdapter();

The BuzzHttpAdapter is tweakable, actually you can pass a Browser object to this adapter:

<?php

$buzz    = new \Buzz\Browser(new \Buzz\Client\Curl());
$adapter = new \Geocoder\HttpAdapter\BuzzHttpAdapter($buzz);

Now, you have to choose a provider which is closed to what you want to get.

FreeGeoIpProvider

The FreeGeoIpProvider named free_geo_ip is able to geocode IPv4 and IPv6 addresses only.

HostIpProvider

The HostIpProvider named host_ip is able to geocode IPv4 addresses only.

IpInfoDbProvider

The IpInfoDbProvider named ip_info_db is able to geocode IPv4 addresses only. A valid api key is required.

GoogleMapsProvider

The GoogleMapsProvider named google_maps is able to geocode and reverse geocode street addresses.

GoogleMapsBusinessProvider

The GoogleMapsBusinessProvider named google_maps_business is able to geocode and reverse geocode street addresses. A valid Client ID is required. The private key is optional.

BingMapsProvider

The BingMapsProvider named bing_maps is able to geocode and reverse geocode street addresses. A valid api key is required.

OpenStreetMapsProvider

The OpenStreetMapsProvider named openstreetmaps is able to geocode and reverse geocode street addresses.

CloudMadeProvider

The CloudMadeProvider named cloudmade is able to geocode and reverse geocode street addresses. A valid api key is required.

GeoipProvider

The GeoipProvider named geoip is able to geocode IPv4 and IPv6 addresses only. No need to use an HttpAdapter as it uses a local database. See the MaxMind page for more information.

ChainProvider

The ChainProvider named chain is a special provider that takes a list of providers and iterates over this list to get information.

MapQuestProvider

The MapQuestProvider named map_quest is able to geocode and reverse geocode street addresses.

OIORestProvider

The OIORestProvider named oio_rest is able to geocode and reverse geocode street addresses, exclusively in Denmark.

GeocoderCaProvider

The GeocoderCaProvider named geocoder_ca is able to geocode and reverse geocode street addresses, exclusively in USA & Canada.

GeocoderUsProvider

The GeocoderUsProvider named geocoder_us is able to geocode street addresses only, exclusively in USA.

IGNOpenLSProvider

The IGNOpenLSProvider named ign_openls is able to geocode street addresses only, exclusively in France. A valid OpenLS api key is required.

DataScienceToolkitProvider

The DataScienceToolkitProvider named data_science_toolkit is able to geocode IPv4 addresses and street adresses, exclusively in USA & Canada.

YandexProvider

The YandexProvider named yandex is able to geocode and reverse geocode street addresses. The default langage-locale is ru-RU, you can choose between uk-UA, be-BY, en-US, en-BR and tr-TR. This provider can also reverse information based on coordinates (latitude, longitude). It's possible to precise the toponym to get more accurate result for reverse geocoding: house, street, metro, district and locality.

GeoPluginProvider

The GeoPluginProvider named geo_plugin is able to geocode IPv4 addresses and IPv6 addresses only.

GeoIPsProvider

The GeoIPsProvider named geo_ips is able to geocode IPv4 addresses only. A valid api key is required.

MaxMindProvider

The MaxMindProvider named maxmind is able to geocode IPv4 and IPv6 addresses only. A valid City/ISP/Org or Omni service's api key is required. This provider provides two constants CITY_EXTENDED_SERVICE by default and OMNI_SERVICE.

GeonamesProvider

The GeonamesProvider named geonames is able to geocode and reverse geocode places. A valid username is required.

IpGeoBaseProvider

The IpGeoBaseProvider named ip_geo_base is able to geocode IPv4 addresses only, very accurate in Russia.

BaiduProvider

The BaiduProvider named baidu is able to geocode and reverse geocode street addresses, exclusively in China. A valid api key is required.

TomTomProvider

The TomTomProvider named tomtom is able to geocode and reverse geocode street addresses. The default langage-locale is en, you can choose between de, es, fr, it, nl, pl, pt and sv. A valid api key is required.

ArcGISOnlineProvider

The ArcGISOnlineProvider named arcgis_online is able to geocode and reverse geocode street addresses. It's possible to specify a sourceCountry to restrict result to this specific country thus reducing request time (note that this doesn't work on reverse geocoding). This provider also supports SSL.

Using The Providers

You can use one of them or write your own provider. You can also register all providers and decide later. That's we'll do:

<?php

$geocoder = new \Geocoder\Geocoder();
$geocoder->registerProviders(array(
    new \Geocoder\Provider\GoogleMapsProvider(
        $adapter, $locale, $region, $useSsl
    ),
    new \Geocoder\Provider\GoogleMapsBusinessProvider(
        $adapter, '<CLIENT_ID>', '<PRIVATE_KEY>', $locale, $region, $useSsl
    ),
    new \Geocoder\Provider\YandexProvider(
        $adapter, $locale, $toponym
    ),
    new \Geocoder\Provider\MaxMindProvider(
        $adapter, '<MAXMIND_API_KEY>', $service, $useSsl
    ),
    new \Geocoder\Provider\ArcGISOnlineProvider(
        $adapter, $sourceCountry, $useSsl
    ),
));

Parameters:

$locale is available for YandexProvider, BingMapsProvider and TomTomProvider.
$region is available for GoogleMapsProvider and GoogleMapsBusinessProvider.
$toponym is available for YandexProvider.
$service is available for MaxMindProvider.
$useSsl is available for GoogleMapsProvider, GoogleMapsBusinessProvider, MaxMindProvider and ArcGISOnlineProvider.
$sourceCountry is available for ArcGISOnlineProvider.

Using The ChainProvider

As said it's a special provider that takes a list of providers and iterates over this list to get information. Note that it stops its iteration when a provider returns a result. The result is returned by GoogleMapsProvider because FreeGeoIpProvider and HostIpProvider cannot geocode street addresses. BingMapsProvider is ignored.

$geocoder = new \Geocoder\Geocoder();
$adapter  = new \Geocoder\HttpAdapter\CurlHttpAdapter();
$chain    = new \Geocoder\Provider\ChainProvider(array(
    new \Geocoder\Provider\FreeGeoIpProvider($adapter),
    new \Geocoder\Provider\HostIpProvider($adapter),
    new \Geocoder\Provider\GoogleMapsProvider($adapter, 'fr_FR', 'France', true),
    new \Geocoder\Provider\BingMapsProvider($adapter, '<API_KEY>'),
    // ...
));
$geocoder->registerProvider($chain);

try {
    $geocode = $geocoder->geocode('10 rue Gambetta, Paris, France');
    var_export($geocode);
} catch (Exception $e) {
    echo $e->getMessage();
}

Everything is ok, enjoy!

API

The main method is called geocode() which receives a value to geocode. It can be an IP address or a street address (partial or not).

<?php

$result = $geocoder->geocode('88.188.221.14');
// Result is:
// "latitude"       => string(9) "47.901428"
// "longitude"      => string(8) "1.904960"
// "bounds"         => array(4) {
//     "south" => string(9) "47.813320"
//     "west"  => string(8) "1.809770"
//     "north" => string(9) "47.960220"
//     "east"  => string(8) "1.993860"
// }
// "streetNumber"   => string(0) ""
// "streetName"     => string(0) ""
// "cityDistrict"   => string(0) ""
// "city"           => string(7) "Orleans"
// "zipcode"        => string(0) ""
// "county"         => string(6) "Loiret"
// "countyCode"     => null
// "region"         => string(6) "Centre"
// "regionCode"     => null
// "country"        => string(6) "France"
// "countryCode"    => string(2) "FR"
// "timezone"       => string(6) "Europe/Paris"

$result = $geocoder->geocode('10 rue Gambetta, Paris, France');
// Result is:
// "latitude"       => string(9) "48.863217"
// "longitude"      => string(8) "2.388821"
// "bounds"         => array(4) {
//     "south" => string(9) "48.863217"
//     "west"  => string(8) "2.388821"
//     "north" => string(9) "48.863217"
//     "east"  => string(8) "2.388821"
// }
// "streetNumber"   => string(2) "10"
// "streetName"     => string(15) "Avenue Gambetta"
// "cityDistrict"   => string(18) "20E Arrondissement"
// "city"           => string(5) "Paris"
// "county"         => string(5) "Paris"
// "countyCode"     => null
// "zipcode"        => string(5) "75020"
// "region"         => string(14) "Ile-de-France"
// "regionCode"     => null
// "country"        => string(6) "France"
// "countryCode"    => string(2) "FR"
// "timezone"       => string(6) "Europe/Paris"

The geocode() method returns a Geocoded result object with the following API, this object also implements the ArrayAccess interface:

getCoordinates() will return an array with latitude and longitude values;
getLatitude() will return the latitude value;
getLongitude() will return the longitude value;
getBounds() will return an array with south, west, north and east values;
getStreetNumber() will return the street number/house number value;
getStreetName() will return the street name value;
getCity() will return the city;
getZipcode() will return the zipcode;
getCityDistrict() will return the city district, or sublocality;
getCounty() will return the county;
getCountyCode() will return the county code (county short name);
getRegion() will return the region;
getRegionCode() will return the region code (region short name);
getCountry() will return the country;
getCountryCode() will return the ISO country code;
getTimezone() will return the timezone.

The Geocoder's API is fluent, you can write:

<?php

$result = $geocoder
    ->registerProvider(new \My\Provider\Custom($adapter))
    ->using('custom')
    ->limit(10)
    ->geocode('68.145.37.34')
    ;

The using() method allows you to choose the provider to use by its name. When you deal with multiple providers, you may want to choose one of them. The default behavior is to use the first one but it can be annoying.

The limit() method allows you to configure the maximum number of results being returned. Depending on the provider you may not get as many results as expected, it is a maximum limit, not the expected number of results.

Reverse Geocoding

This library provides a reverse() method to retrieve information from coordinates:

$result = $geocoder->reverse($latitude, $longitude);

Dumpers

Geocoder provides dumpers that aim to transform a ResultInterface object in standard formats.

GPS eXchange Format (GPX)

The GPS eXchange format is designed to share geolocated data like point of interests, tracks, ways, but also coordinates. Geocoder provides a dumper to convert a ResultInterface object in an GPX compliant format.

Assuming we got a $result object as seen previously:

<?php

$dumper = new \Geocoder\Dumper\GpxDumper();
$strGpx = $dumper->dump($result);

echo $strGpx;

It will display:

<gpx
    version="1.0"
    creator="Geocoder" version="1.0.1-dev"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://www.topografix.com/GPX/1/0"
    xsi:schemaLocation="http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd">
    <bounds minlat="2.388911" minlon="48.863151" maxlat="2.388911" maxlon="48.863151"/>
    <wpt lat="48.8631507" lon="2.3889114">
        <name><![CDATA[Paris]]></name>
        <type><![CDATA[Address]]></type>
    </wpt>
</gpx>

GeoJSON

GeoJSON is a format for encoding a variety of geographic data structures.

Keyhole Markup Language (KML)

Keyhole Markup Language is an XML notation for expressing geographic annotation and visualization within Internet-based, two-dimensional maps and three-dimensional Earth browsers.

Well-Known Binary (WKB)

The Well-Known Binary (WKB) representation for geometric values is defined by the OpenGIS specification.

Well-Known Text (WKT)

Well-known text (WKT) is a text markup language for representing vector geometry objects on a map, spatial reference systems of spatial objects and transformations between spatial reference systems.

Formatter

A common use case is to print geocoded data. Thanks to the Formatter class, it's really easy to format a ResultInterface object as a string:

<?php

// $result is an instance of ResultInterface
$formatter = new \Geocoder\Formatter\Formatter($result);

$formatter->format('%S %n, %z %L');
// 'Badenerstrasse 120, 8001 Zuerich'

$formatter->format('<p>%S %n, %z %L</p>');
// '<p>Badenerstrasse 120, 8001 Zuerich</p>'

Here is the mapping:

Street Number: %n
Street Name: %S
City: %L
City District: %D
Zipcode: %z
County: %P
County Code: %p
Region: %R
Region Code: %r
Country: %C
Country Code: %c
Timezone: %T

Extending Things

You can provide your own adapter, you just need to create a new class which implements HttpAdapterInterface.

You can also write your own provider by implementing the ProviderInterface.

You can provide your own result by extending DefaultResultFactory or MultipleResultFactory and implementing ResultInterface if your provider returns one or multiple results and more informations than the default one. Please note that the method createFromArray is marked final in these factories.

If you need your own ResultFactory, just implement ResultFactoryInterface.

Note, AbstractProvider and AbstractResult classes can help you by providing useful features.

You can provide your own dumper by implementing the DumperInterface.

Write your own formatter by implementing the FormatterInterface.

Contributing

See CONTRIBUTING file.

Unit Tests

To run unit tests, you'll need cURL and a set of dependencies you can install using Composer:

php composer.phar install --dev

Once installed, just launch the following command:

phpunit

You'll obtain some skipped unit tests due to the need of API keys.

Rename the phpunit.xml.dist file to phpunit.xml, then uncomment the following lines and add your own API keys:

<php>
    <!-- <server name="IPINFODB_API_KEY" value="YOUR_API_KEY" /> -->
    <!-- <server name="BINGMAPS_API_KEY" value="YOUR_API_KEY" /> -->
    <!-- <server name="CLOUDMADE_API_KEY" value="YOUR_API_KEY" /> -->
    <!-- <server name="IGN_WEB_API_KEY" value="YOUR_API_KEY" /> -->
    <!-- <server name="GEOIPS_API_KEY" value="YOUR_API_KEY" /> -->
    <!-- <server name="MAXMIND_API_KEY" value="YOUR_API_KEY" /> -->
    <!-- <server name="GEONAMES_USERNAME" value="YOUR_USERNAME" /> -->
    <!-- <server name="BAIDU_API_KEY" value="YOUR_API_KEY" /> -->
    <!-- <server name="TOMTOM_GEOCODING_KEY" value="YOUR_GEOCODING_KEY" /> -->
    <!-- <server name="TOMTOM_MAP_KEY" value="YOUR_MAP_KEY" /> -->
</php>