如何在獲得評分時將平均值限制為兩位小數？

Question

平均評分

這是我的代碼！ 如何獲得只有2個小數位的平均值？

 public function getAveRating($restoid){ 
      $where=array(
           "restoid"=>$restoid
           );
      $this->db->where($where);
      $this->db->select_avg('rate');
      $query = $this->db->get('ratings')->first_row('array');
      return $query['rate'];
 }

如何在獲得評分時將平均值限制為兩位小數？

Answer 1

http://php.net/round

 public function getAveRating($restoid){ 
      $where=array(
           "restoid"=>$restoid
           );
      $this->db->where($where);
      $this->db->select_avg('rate');
      $query = $this->db->get('ratings')->first_row('array');
      return round($query['rate'], 2);
 }

Answer 2

更改return $query['rate']; return round($query['rate'],2);