Destroy Session但保留flashdata [英] Destroy Session but keep flashdata

问题描述

我在我的CI 1.7.3应用程式中使用 Tank Auth 进行用户管理。一切正常工作，但我试图设置 flash_message 将显示，当用户注销。问题是 $ this-> tank_auth-> logout（）; 函数销毁会话。我修改了在Tank Auth库的注销功能，看起来像：

I am using Tank Auth for user management in my CI 1.7.3 App. Everything is working fine but I'm trying to set a flash_message to be displayed when the user logs out. The problem is the $this->tank_auth->logout(); function destroys the session. I have modified the logout function in the Tank Auth library to look like:

    function logout()   {
        $this->delete_autologin();

        // See http://codeigniter.com/forums/viewreply/662369/ as the reason for the next line
        $user_session_data = array('user_id' => '', 'username' => '', 'status' => '');
        $this->ci->session->set_userdata($user_session_data);
        $this->ci->session->unset_userdata($user_session_data);
    }

以前

function logout()
        {
            $this->delete_autologin();

            // See http://codeigniter.com/forums/viewreply/662369/ as the reason for the next line
            $this->ci->session->set_userdata(array('user_id' => '', 'username' => '', 'status' => ''));

            $this->ci->session->sess_destroy();
        }

在我的控制器中有

function logout(){
    if ($this->tank_auth->is_logged_in()) { // logged in
        $this->session->set_flashdata('status_message', $this->lang->line('auth_message_logged_out'));
        $this->tank_auth->logout();

        redirect('');           

    } 

}

如果我删除 $ this-> tank_auth-> logout（）; 函数，消息显示正常。我确定这是一个简单的会话问题

If I remove the $this->tank_auth->logout(); function the message shows fine. I'm sure it's a simple session problem

推荐答案

如果您尝试在同一请求中使用数据库时设置flashdata调用 sess_destroy（），它将不工作（因为没有会话来追加flashdata）。

If you try to set flashdata while using a database in the same request after you call sess_destroy(), it won't work (because there is no session to append the flashdata to).

为了解决这个问题，在调用 sess_destroy（）之后添加 $ this-> ci-> session-> sess_create（）; 。这是因为您在尝试向其附加数据之前重新创建会话。如果您在数据库中使用会话，这是在 sess_destroy（）后使用flashdata的唯一方法。

To fix this problem, add $this->ci->session->sess_create(); after the call to sess_destroy(). This works because you're re-creating the session before trying to append data to it. This is the only way to use flashdata after a sess_destroy() if you're using sessions in a database.

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