public function testViewportBiasing()
 {
     $location = 'Winnetka';
     $swLat = 34.172684;
     $swLng = -118.604794;
     $neLat = 34.236144;
     $neLng = -118.500938;
     $params = array('language' => 'en', 'sensor' => 'false');
     $format = 'json';
     $params = array_merge($params, array('bounds' => "{$swLat},{$swLng}|{$neLat},{$neLng}"));
     $params = array_merge($params, array('address' => $location));
     $this->service->biasViewport($swLat, $swLng, $neLat, $neLng);
     $this->assertEquals("http://maps.googleapis.com/maps/api/geocode/{$format}?" . http_build_query($params, '', '&'), $this->service->generateUrl($location, $format), 'URLs did not match');
     $this->service->removeViewportBias();
     $bounds = new stdClass();
     $bounds->southwest = new stdClass();
     $bounds->northeast = new stdClass();
     $bounds->southwest->lat = $swLat;
     $bounds->southwest->lng = $swLng;
     $bounds->northeast->lat = $neLat;
     $bounds->northeast->lng = $neLng;
     $this->service->biasViewportByBoundsObject($bounds);
     $this->assertEquals("http://maps.googleapis.com/maps/api/geocode/{$format}?" . http_build_query($params, '', '&'), $this->service->generateUrl($location, $format), 'URLs did not match');
 }
<?php

/**
 * This example shows
 *
 * - How to bias a response towards a region
 * - How to bias a response towards a viewport
 */
require '../sdk/bootstrap.php';
require '../sdk/communicator/CurlCommunicator.php';
$service = new GoogleGeocodeServiceV3(new CurlCommunicator());
// Show that the API assumes "Portland, OR" for "Portland USA"
echo $service->geocode('Portland USA')->getFormattedAddress(), '<br>';
// Now geocode the state of Maine and bias results to its viewport
$maine = $service->geocode('Maine, USA');
$service->biasViewportByBoundsObject($maine->getViewport());
// Re-geocode "Portland USA"
echo $service->geocode('Portland USA')->getFormattedAddress(), '<br>';
// Establish an ambiguous location
$location = 'Toledo';
// Bias for the USA
$service->biasRegion('com');
echo $service->geocode($location)->getFormattedAddress(), '<br>';
// Bias for Spain
$service->biasRegion('es');
echo $service->geocode($location)->getFormattedAddress(), '<br>';
echo '<hr>', highlight_file(__FILE__, 1);