Symfony Geolocation service using geoplugin.net

GeoIpService.php

<?php

/*
 * Installation (Symfony):
 * =======================
 * # services.yml
 * services:
 *     # ...
 *     acme.geoip:
 *       class: Acme\AcmeBundle\Service\GeoIpService
 * 
 * Usage (Symfony):
 * ================
 * $geoIp = $this->get("acme.geoip");
 * $response = $geoIp->locate();
 */

namespace Acme\AcmeBundle\Service;

use Symfony\Component\HttpFoundation\RequestStack;

class GeoIpService
{
    private $request;
    
    public function setDependencies(RequestStack $requestStack)
    {
        $this->request = $requestStack->getCurrentRequest();
    }
    
    public function locate()
    {
        $result = null;
        
        $clientIp = $this->request->getClientIp();

        // doesn't filter loopback ip
        if (\filter_var($clientIp, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE)) {
            $response = \json_decode(\file_get_contents("http://www.geoplugin.net/json.gp?ip=$clientIp"));

            if (
                $response
                && \property_exists($response, "geoplugin_status")
                && \in_array($response->geoplugin_status, array(200, 206))
            ) {
                $result = array(
                    "city" => $response->geoplugin_city,
                    "state" => $response->geoplugin_regionName,
                    "state_code" => $response->geoplugin_regionCode,
                    "country" => $response->geoplugin_countryName,
                    "country_code" => $response->geoplugin_countryCode,
                    "continent_code" => $response->geoplugin_continentCode,
                    "longitude" => $response->geoplugin_longitude,
                    "latitude" => $response->geoplugin_latitude
                );
            }
        }

        return $result;
    }
}