各位大大好:

想請問前端用ajax post傳至後端substitute.php
substitute.php在呼叫物件導向方法(into_substitue)寫入資料庫，回傳給ajax成功訊息，有時要等1~2秒會比較慢，想請問是甚麼問題呢? 謝謝

物件導向

class Survey_class extends Dbh //繼承資料庫
{   
    private $db;
    public function __construct()
    {
        $this->db = $this->connect();
       
    }
    
    public function into_substitue($title,$starttime,$endtime,$substitue,$auditor) 
    {
    
      $sql="insert into substitue (title,starttime,endtime,substitueid) values (:title,:starttime,:endtime,:substitueid)";
      $result =$this->db->prepare($sql);
      $result->execute(array(
        "title"=>$title,
        "starttime"=>$starttime,
        "endtime"=>$endtime,
        "substitueid"=>$substitueinfo[0],
      ));
      return 1;
    }
     public function __destruct()
    {
        $this->db=null;
    }
}