我目前正在为一个应用程序编写一组框架类,从一个名为StoreLOGic的基类开始,该基类包含税收规则,折扣规则等.类Cart,Order,Quote等将扩展StoreLogic,因为它们都将使用StoreLogic提供的同一组方法.

一旦完成这些核心类,我将通过扩展Cart,Quote和StoreLogic来实现它们,因为这些类的每个应用程序将根据我们的各种客户需求而不同.从父类重写方法很容易,但是在孩子们扩展它们之前覆盖祖父母的课程似乎……不可能？我觉得我这样做是错误的(t​​m)…而且我认为像你这样经验丰富的人可能会指出我正确的方向.看看代码,看看你的想法！

@H_301_13@/* My core classes are something like this: */ abstract class StoreLogic { public function applyDiscount($total) { return $total - 10; } } abstract class Cart extends StoreLogic { public function addITem($item_name) { echo 'added' . $item_name; } } abstract class Order extends StoreLogic { // .... } /* Later on when I want to use those core classes I need to be able to override * methods From the grandparent class so the grandchild can use the new overriden * methods: */ class MyStoreLogic extends StoreLogic { public function applyDiscount($total) { return $total - 5; } } class MyOrder extends Order { // ... } class MyCart extends Cart { public $total = 20; public function doDiscounts() { $this->total = $this->applyDiscount($this->total); echo $this->total; } } $cart = new MyCart(); $cart->doDiscounts(); // Uses StoreLogic,not MyStoreLogic..