# Google map api
## 用地址找經緯度

  public function address_geo($address)
  { 
    $address = urlencode($address);
    $url = 'https://maps.googleapis.com/maps/api/geocode/json?address='.$address.'&sensor=false&key='.$this->gmap_key;
    $curl = curl_init();
    $options = array(
      CURLOPT_URL => $url,
      CURLOPT_RETURNTRANSFER => 1,
      CURLOPT_CONNECTTIMEOUT => 5,
      CURLOPT_SSL_VERIFYHOST => 0,
      CURLOPT_SSL_VERIFYPEER => 0
    );
    curl_setopt_array($curl, $options);
    $fileContents = curl_exec($curl);
    curl_close($curl);
    $rs = json_decode($fileContents, true);
    if ($rs['status'] === 'OK') {
      $location = $rs['results'][0]['geometry']['location'];
      return $location;
      // $lat = $location['lat'];
      // // $lng = $location['lng'];
    }
  }

## 起終點計算距離與時間

/**
 * [distance 起終點計算距離與時間]
 * @param  [type] $start [description]
 * @param  [type] $end   [description]
 * @return [type]        [description]
 */
public function distance($start, $end)
{
  /*
  https://maps.googleapis.com/maps/api/distancematrix/outputFormat?parameters
  units=metric 公里&里 算距離
  origins=起點 經緯度(不能有空格)
  destinations=終點 經緯度(不能有空格)
   */
  $get = array();
  $get[] = 'units=metric';
  $get[] = 'origins='.$start['lat'].','.$start['lng'];
  $get[] = 'destinations='.$end['lat'].','.$end['lng'];
  $get[] = 'key='.$this->gmap_key;
  
  $url = 'https://maps.googleapis.com/maps/api/distancematrix/json?'.implode('&', $get);
  $curl = curl_init();
  $options = array(
    CURLOPT_URL => $url,
    CURLOPT_RETURNTRANSFER => 1,
    CURLOPT_SSL_VERIFYHOST => 0,
    CURLOPT_SSL_VERIFYPEER => 0,
    CURLOPT_TIMEOUT => 30,
    CURLOPT_HEADER => 0
  );
  curl_setopt_array($curl, $options);
  $tmpInfo = curl_exec($curl);
  curl_close($curl);
  $rs = json_decode($tmpInfo, true);
  return array(
    'distance' => $rs['rows'][0]['elements'][0]['distance']['value'],
    'duration' => $rs['rows'][0]['elements'][0]['duration']['value']
  );
}