php - 类的单个初始化

Question

我已将类的实例存储在类内的属性中，以进行无效的多次初始化(希望有意义)。

看起来像这样:

class baseClass
{
    public $db;

    public function __construct()
    {
         $this->db =  new dbClass(); // this class is just a query class
    }   

}


class page  extends baseClass {

   public function __construct()
   {
           parent::__construct();
       }

       public function index()
       {
         // this works very fine and return result what i want //
         $user = $this->db->query('blah blah');


         // my problem is when i use the same property ($this->db) which 
         //contains the dbClass()

         $mesg = $this->db->query('blah blah');

         // the result of both query merge together
         // i think i figured out whats the problem here but i dont know what to do
         // i think i need to reset or the destroy the instance of $this->db 
         // and back it to null values


         // or when i put print_r($this->db) after my first query (the  $users )
         // it display the previous property i set (ofcourse)
         // what i want is.. every time i use the $this->db, i want 
         // it like the first time i use it, or fresh.
         // is there any way ? 
         // thanks for the help experts ;) 


       }
}

Answer 1

问题出在您的 dbClass实现。似乎它无法将两个查询彼此分开。

你应该阅读dbClass的代码并找出如何分别运行两个查询；如果这是不可能的，您至少应该能够在开始另一个查询结果之前完成一个查询结果。