如何防止codeigniter中的某个特定视图不能通过url直接访问？

Question

In view i have two folders pages, templates. Inside pages i have two folders nonmember and member. Inside templates i have header.php and footer.php. In nonmember folder i have a notification file, email_notification.php, along with other files like home.php, about.php etc.

pages are being generated dynamically using the following function

public function index(){
    $this->nonmember();
  }

public function nonmember($page = 'home'){ 

   if (! file_exists(APPPATH.'views/pages/nonmember/'.$page.'.php')) {
    show_404();
   }

   $data['title'] = ucfirst($page);

   $this->load->view('templates/header', $data);
   $this->load->view('pages/nonmember/'.$page, $data);
   $this->load->view('templates/footer', $data);

  }

And calling it in for showing login page or registration page

public function registration(){
//validation rules

   if($this->form_validation->run()){
    //add user to a temporary table
    //send an email with an activation code
    $this->nonmember('email_notification'); 
   //that view says click the link in email for activating account
     }else{
    $this->nonmember('registration');
    }
}

Problem is that email_notification view can also be accessed via url, which is not desirable. How do i prevent email_notification from direct access? like if user try to access it using url i want to redirect them back to home page, or show_error() ?

Answer 1

As James Lalor already mentioned about using session which is a good solution. What i have done is just before $this->nonmember('email_notification'); i'm creating a session using

$this->session->set_userdata('email_notification' => 1);

And in the nonmember function i'm just checking if that session is set to 1 or not.

if ($page == 'email_notification' && $this->session->userdata('email_notification') != 1) {
     redirect($this->agent->referrer());
   }

Later when user activate their account i'm destroying the session