php - Cakephp beforeFilter 与构造函数

Question

我是 cakephp 的新手。我找到了一个被广泛使用的方法

beforeFilter() 

我的问题是，它与类构造函数有何不同？ 如果我打电话怎么办

parent::beforeFilter();

从构造函数而不是 beforeFilter(); 我只想知道如果我在

中编写相同的代码会怎样

public function __construct() {
   // Code here
} 

代替

public function beforeFilter() {
}

谢谢

Answer 1

construct() 用于构建，加载你需要的东西。

__construct( ) public Constructor

Parameters: ComponentCollection $collection A ComponentCollection this component can use to lazy load its components

http://api.cakephp.org/2.3/class-Component.html#___construct

---

beforeFilter() 执行您需要在任何其他操作之前执行的函数

Controller::beforeFilter() This function is executed before every action in the controller. It’s a handy place to check for an active session or inspect user permissions.

http://api.cakephp.org/2.3/class-Controller.html#_beforeFilter

Called before the controller action. You can use this method to configure and customize components or perform logic that needs to happen before each controller action.

Note: The beforeFilter() method will be called for missing actions, and scaffolded actions.

http://book.cakephp.org/2.0/en/controllers.html#request-life-cycle-callbacks

通常您不需要构造函数，因为在遵循 CakePHP 约定时，只有极少数情况下您实际上别无选择，只能“强制”手动加载某些内容...