php中的抽象工厂模式

// 产品(数据库)标准


 interface DbInterface{
	public function connect(Array $params=array());
    public function query($sql);
    public function insert($table, $record);
    public function update($table, $record, $where);
    public function delete($table, $where);
}



// 具体产品(Mysql)

class MysqlDb implements DbInterface(){

    public function connect(Array $params=array());
    public function query($sql){}
    public function insert($table, $record){}
    public function update($table, $record, $where){}
    public function delete($table, $where){}

}


class OracalDb implements DbInterface(){

    public function connect(Array $params=array()){}
    public function query($sql){}
    public function insert($table, $record){}
    public function update($table, $record, $where){}
    public function delete($table, $where){}

}



// 构造工厂 

interface CreateFactory(){

    function createDB(); //分为 内敛的和外向的

}


class FactoryMysql implements CreateFactory{
    function createDB() {
        return  new  MysqlDb();
    }
}


class FactoryOracle implements CreateFactory{
    function createDB() {
        return  new  OracalDb();
    }
}




(1) 如果想使用mysql

$db = new FactoryMysql()->createDB();   //