sess_destroy() 无法正常工作

sess_destroy() doesn't work properly


我正在尝试在 Codeigniter 中实现注销。这是我正在做的事情:

public function logout() {

        if($this->session->userdata('session_id')){
            $this->session->unset_userdata('logged_in');
            $this->session->unset_userdata('session_id');
            $this->session->unset_userdata('email');
            $this->session->sess_destroy();
            redirect('welcome', 'refresh');
        }
    }

这是登录功能:

public function authentication() {
        $this->load->helper('html');
        $this->load->library('javascript');
        $this->load->helper('url');
        $this->load->library('session');
        $this->load->model('Tecnici_Model');
        $this->load->library('encrypt');
        $this->load->library('form_validation');

        $this->form_validation->set_rules('email','Email','required');
        $this->form_validation->set_rules('password','Password','required');
        $email = $this->input->post('email');
        $password = md5($this->input->post('password'));
        $email = mysql_real_escape_string($email);
        $password = mysql_real_escape_string($password);
        $this->db->where('e_mail', $email, TRUE);
        $this->db->where('password', $password, TRUE);
        $query = $this->db->get("tecnici");
        $result = $query->num_rows();

        if($result > 0) {
            $newdata = array(
                   'session_id' => md5(uniqid(rand(), true)),
                   'email'  => $email,
                   'logged_in' => TRUE
            );
            $this->session->set_userdata($newdata);
            redirect('welcome');
        } else {
            redirect('tecnici/login');
        }
    }

身份验证工作正常,因为 session_id 已设置,但是当我单击注销按钮时,它通过显示空白页面停止在注销方法中。我哪里做错了?谢谢!

更新 1
这是 Welcome 控制器的 index() 函数:

public function index() {
        $this->load->helper('html');
        $this->load->library('javascript');
        $this->load->helper('url');
        $this->load->library('session');

        $this->load->view('header');
        $this->load->view('welcome_message');
    }

更新 2
我试过@AdrienXL 解决方案:

public function user_logout() {
    $this->session->sess_destroy();
    redirect('welcome');
}

并且我已经在 'welcome' 视图上打印了会话 ID。当我点击注销按钮时,会话 ID 每次都会更改。我无法解释为什么..

问题是,如果要销毁它,为什么要测试会话是否已设置? 此外,sess_destroy() 将销毁所有会话,甚至是闪存会话。您无需先取消设置。

一个简单的函数就足够了:

public function logout()
{
    $this->session->sess_destroy();
    redirect('welcome');
}

http://www.codeigniter.com/user_guide/libraries/sessions.html

编辑:

我觉得你太专注于 session_id。这是 CI 文档中的引述:

When a page is loaded, the session class will check to see if valid session data exists in the user's session cookie. If sessions data does not exist a new session will be created and saved.

这就是为什么你总是有 session_id。在你的情况下,你应该检查是否有一个名为 "logged_in" 的会话。