public function coordinates($set = false) {

		$address = $this->city.' '.$this->street.' '.$this->building;
    	$address = str_replace(' ', '+', $address);
		$apiKey = env('GOOGLE_MAPS_API_KEY', null);
		$counter = 0;

		do {
			$results = json_decode(file_get_contents('https://maps.googleapis.com/maps/api/geocode/json?address='.$address.'&key='.$apiKey));

			$geo['lat'] = $results->results[0]->geometry->location->lat;
			$geo['lng'] = $results->results[0]->geometry->location->lng;
			$counter++;
		} while ($results->status != 'OK' && $counter <= 5);

		if ($set) {
			$this->setAttribute('lat', $geo['lat']);
			$this->setAttribute('lng', $geo['lng']);
		}

		return $geo;
	}

Wywołanie:
$zmienna->coordinates(true);