模型的泛型超类应该是静态的还是单例？

Question

status: accepting the only one answer choice. with thanks.

shouldn't I use static functions and self:: instead of $this-> in here . I would use this class Dao as a super class in all of my model classes.

The Dao class will be the super class of all the model classes.

Should it be singleton? should it use static?

any tips ?

<?php 
class Dao extends Object{
    private $con;
    //will put this in defines includes file. Or user from WP.
    private $dbhost     = "localhost";
    private $dbname     = "wpm";
    private $dbuser     = "root";
    private $dbpass     = "root";

    public function __construct() {
       if(!$this->con){
           $this->con = new PDO("mysql:host=$this->dbhost;dbname=$this->dbname",$this->dbuser,$this->dbpass); //will make it generic. 
       }
    }

    protected function getCon(){
        if(!$this->con){
           $this->con = new PDO("mysql:host=$this->dbhost;dbname=$this->dbname",$this->dbuser,$this->dbpass);
        } 
        return $this->con;
    }

    protected function executeQuery($query, $fetchType, $paramArray){
        $stmt = $this->getCon()->geprepare($query);
        $stmt->execute($paramArray);
        $stmt->setFetchMode($fetchType);//        $stmt->setFetchMode(PDO::FETCH_ASSOC);
        $result = $stmt->fetch();
        return $result;
    } 

}

?>

Answer 1

DAO is not the model. That's different classes.

DAO class should NOT be the super class of all the model. Model prototype should be super class of all the model.

"Supermodel" should have methods like delete(), save(), find() and such. DAO should be assigned to the model variable and used this way.

As of should supermodel be static - it depends. Most frameworks disguise static in loaders, which is all the same to my view, but honest static for some reason despised and so disguise have to be used.