Get city name from latitude longitude in php

function getcityname($latitude,$longitude) // get city name from lat long.
{
$geolocation = $latitude.','.$longitude;
$request = 'http://maps.googleapis.com/maps/api/geocode/json?latlng='.$geolocation.'&sensor=false';
$file_contents = file_get_contents($request);
$json_decode = json_decode($file_contents);
if(isset($json_decode->results[0])) {
    $response = array();
    foreach($json_decode->results[0]->address_components as $addressComponet) {
        if(in_array('political', $addressComponet->types)) {
                $response[] = $addressComponet->long_name;
        }
    }

    if(isset($response[0])){ $first  =  $response[0];  } else { $first  = 'null'; }
    if(isset($response[1])){ $second =  $response[1];  } else { $second = 'null'; }
    if(isset($response[2])){ $third  =  $response[2];  } else { $third  = 'null'; }
    if(isset($response[3])){ $fourth =  $response[3];  } else { $fourth = 'null'; }
    if(isset($response[4])){ $fifth  =  $response[4];  } else { $fifth  = 'null'; }

    if( $first != 'null' && $second != 'null' && $third != 'null' && $fourth != 'null' && $fifth != 'null' ) {
         $city = $second;
    }
    else if ( $first != 'null' && $second != 'null' && $third != 'null' && $fourth != 'null' && $fifth == 'null'  ) {
         $city = $second;
    }
    else if ( $first != 'null' && $second != 'null' && $third != 'null' && $fourth == 'null' && $fifth == 'null' ) {
        $city = $first;
    }
    else if ( $first != 'null' && $second != 'null' && $third == 'null' && $fourth == 'null' && $fifth == 'null'  ) {
       $city = $first;
     
    }
return $city;
  }

}