Session Cakephp在注销后不会使页面过期

我正在学习cakePHP，我已经编写了手册的示例，问题在于UsersController的注销方法，当我按下注销链接时，应用程序将重定向到登录表单，但浏览器的后退按钮允许返回到需要经过身份验证的用户的页面，添加帖子的页面就是一个例子

源代码

UsersController.php

PostsController.php

AppController.php

---

请从AppController检查beforeFilter函数

您已明确允许通过AuthComponent执行某些操作

public function beforeFilter() {
    $this->Auth->allow('index','view','login','helloajax');
}

请验证您希望允许未经身份验证的访问者执行的操作

---

因为AppController是由cakephp中的每个控制器扩展的。结果表明，您允许未经验证的用户访问您已创建或将创建的每个控制器的索引、视图、登录等操作

是的，您是对的，但问题是浏览器的“后退”按钮允许返回到需要验证的操作。例如，这发生在需要身份验证的PostsController的Add操作中。

<?php

class PostsController extends AppController {

    public $helpers = array('Html', 'Form');

    public function isAuthorized($user) {
// All registered users can add posts
        if ($this->action === 'add') {
            return true;
        }
// The owner of a post can edit and delete it
        if (in_array($this->action, array('edit', 'delete'))) {
            $postId = (int) $this->request->params['pass'][0];
            if ($this->Post->isOwnedBy($postId, $user['id'])) {
                return true;
            }
        }
        return parent::isAuthorized($user);
    }

    public function index() {
        if ($this->Session->read('userid')) {
            $this->set('posts', $this->Post->find('all', array('conditions' => array('Post.user_id' => AuthComponent::user('id')))));
        } else {
            $this->set('posts', $this->Post->find('all'));
        }
    }

    public function view($id = null) {
        if (!$id) {
            throw new NotFoundException(__('Invalid post'));
        }
        $post = $this->Post->findById($id);
        if (!$post) {
            throw new NotFoundException(__('Invalid post'));
        }
        $this->set('post', $post);
    }

    public function add() {
    if ($this->Auth->loggedIn()) {
        if ($this->request->is('post')) {
            $this->request->data['Post']['user_id'] = $this->Auth->user('id');
            $this->Post->create();
            if ($this->Post->save($this->request->data)) {
                $this->Session->setFlash(__('Your post has been saved.'));
                return $this->redirect(array('action' => 'index'));
            }
            $this->Session->setFlash(__('Unable to add your post.'));
        }
    } else {
        return $this->redirect(array('controller' => 'users', 'action' => 'login'));
    }
}

    public function edit($id = null) {
        if (!$id) {
            throw new NotFoundException(__('Invalid post'));
        }
        $post = $this->Post->findById($id);
        if (!$post) {
            throw new NotFoundException(__('Invalid post'));
        }
        if ($this->request->is(array('post', 'put'))) {
            $this->Post->id = $id;
            if ($this->Post->save($this->request->data)) {
                $this->Session->setFlash(__('Your post has been updated.'));
                return $this->redirect(array('action' => 'index'));
            }
            $this->Session->setFlash(__('Unable to update your post.'));
        }
        if (!$this->request->data) {
            $this->request->data = $post;
        }
    }

    public function delete($id) {
        if ($this->request->is('get')) {
            throw new MethodNotAllowedException();
        }
        if ($this->Post->delete($id)) {
            $this->Session->setFlash(
                    __('The post with id: %s has been deleted.', h($id))
            );
            return $this->redirect(array('action' => 'index'));
        }
    }

}

?>

<?php
App::uses('Controller', 'Controller');

/**
 * Application Controller
 *
 * Add your application-wide methods in the class below, your controllers
 * will inherit them.
 *
 * @package     app.Controller
 * @link        http://book.cakephp.org/2.0/en/controllers.html#the-app-controller
 */
class AppController extends Controller {

    public $components = array(
        'Session',
        'Auth' => array(
            'loginRedirect' => array('controller' => 'posts', 'action' => 'index'),
            'logoutRedirect' => array('controller' => 'users','action' => 'login'),
            'authorize' => array('Controller') // Added this line
        )
    );

    public function isAuthorized($user) {
// Admin can access every action
        if (isset($user['role']) && $user['role'] === 'admin') {
            return true;
        }
// Default deny
        return false;
    }

    public function beforeFilter() {
        $this->Auth->allow('index','view','login','helloajax');
    }

}

?>

public function beforeFilter() {
    $this->Auth->allow('index','view','login','helloajax');
}