注销只需重定向到codeigniter中的登录页面

Question

我创建了这样的功能来控制用户的登录和注销：

<?php

if (!defined('BASEPATH'))
exit('No direct script access allowed');

class Control_auth extends CI_Controller {

public function __construct() {
    parent::__construct();
    $this->load->library(array('session'));
    $this->load->helper('url');
    $this->load->model('model_user');
    session_start();
}

public function index() {
    $this->load->view('view_login');
}

public function check_login() {
    $data = array('username' => $this->input->post('username'),
        'password' => $this->input->post('password')
    );

    $hasil = $this->model_user->check_user($data);

    if ($hasil->num_rows() == 1) {

        $akses = $this->input->post('level');

        foreach ($hasil->result() as $sess) {
            $sess_data['logged_in'] = 'logging';
            $sess_data['username'] = $sess->username;
            $sess_data['level'] = $sess->level;

            $this->session->set_userdata($sess_data);
        }

        /* administrator */
        if ($this->session->userdata('level') == 1 && $akses == 'Administrator') { 
            redirect('administrator/control_admin');
        } else {
            echo " <script>alert('Gagal Login: Pilih Hak Akses');history.go(-1);</script>";
        }
        /* member */
        if ($this->session->userdata('level') == 4 && $akses == 'User') {
            redirect('control_member');
        }            
    } else { //false
        echo " <script>alert('Gagal Login: Cek username , password, dan hak akses Anda !');history.go(-1);</script>";
    }
}

public function logout() {
    $this->session->unset_userdata(array('username' => '', 'logged_in' => FALSE));
    $this->session->userdata = array();
    $this->session->sess_destroy();
    redirect('control_auth');
}

}

问题是，当我注销时，它只是重定向到登录页面。因此，在像火狐这样的浏览器中，当点击箭头历史记录时，它仍然可以访问主页。任何解决方案都将是合理的...

Answer 1

添加

session_destroy();

在您的注销功能中，尝试。。。。

Answer 2

注销时只需清除缓存

header("Cache-Control: no-cache, no-store, must-revalidate");
header("Pragma: no-cache"); 
header("Expires: 0"); 

Answer 3

您必须在control_admin功能中添加此代码，以检查此用户是否登录。

    if(!empty($this->session->userdata['username'])){
   //add your code here if logged in
         $this->load->view('yourpagename');
      }else{
       redirect('control_auth');
   }