如何在获得评分时将平均值限制为两位小数？

Question

average rating

Here is my code! How do I get the average that has only 2 decimal places?

 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'];
 }

how do I limit the average into 2 decimal places in getting the rating?

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

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