如何在登录系统中使用会话并在codeigniter中实现注销

Question

codeigniter 的新手正在学习它并停留在 codeigniter 的会话中。我在登录系统上工作，登录部分运行良好，但现在我必须添加会话和注销并将我的其他页面包含到该会话中，这样我就可以限制某人直接访问该页面。所以我如何在我的代码中实现会话和注销。

这是控制器

<?php
class LoginController extends CI_controller
        {
            public function index()
        {
            $this->load->view('header2');
            $this->load->view('login');
            $this->load->view('footer');
        }
            public function checklogin()
        {
            $this->form_validation->set_rules('username' ,'Username', 'required|valid_email');
            $this->form_validation->set_rules('password' ,'Password', 'required|callback_verifyUser');

                if($this->form_validation->run() == false){
                    $this->load->view('header2');
                    $this->load->view('login');
                    $this->load->view('footer');
                    }
                    else
                    {
                        redirect('HomeController/index');
                    }
                }
                    public function verifyUser()
                    {
                        $name = $this->input->post('username');
                        $pass = $this->input->post('password');

                        $this->load->model('LoginModel');

                        if($this->LoginModel->login($name, $pass))
                        {
                            return true;
                        }
                        else
                        {
                            $this->form_validation->set_message('verifyUser','Incorrect Email or Pass');
                            return false;
                        }
                        redirect('LoginController/checklogin');
                    }
            }

模型是这样的

<?php
        class LoginModel extends CI_model
        {
            public function login($name, $pass)
            {
                $this->db->select('name,pass');
                $this->db->from('members');
                $this->db->where('name',$name);
                $this->db->where('pass',$pass);     

                $query = $this->db->get();

                if($query->num_rows() == 1)
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }
        }

视图是

                  <html>
                    <head>
                    <title></title>
                </head>
                <body>
                <?php echo validation_errors(); ?>
                <?php echo form_open('LoginController/checklogin'); ?>
                UserName: 
                <input type="text" name="username" /><br/>
                password:
                <input type="text" name="password" />
                <input type="submit" value="Login" name="submit" />
                </form>
                </body>
                </html>

登录正常，需要在此会话和注销。

Answer 1

登录成功后，像这样在session中设置用户id

$this->session->set_userdata("id",$variable);

这可以在任何地方完成，但对于你来说，在模型中做

if($query->num_rows() == 1)
{         
    // set session here and then return true.
    return true;
}
else
{
    return false;
 }

所以当你想检查会话是否存在时，做这样的事情

if(!$this->session->userdata("id")){
    // redirect the user to login page
}

将以上代码写在所有需要登录的控制器的构造函数中。确保你不检查登录控制器中的会话数据。

Answer 2

在 CI 中查看使用会话的简单过程是

include this library to perform session or else session wont work

  $this->load->library('session');

to save data in session you need to create a array of data and then use set_userdata() to save session data

 $newdata = array(
                   'username'  => 'example_user',
                   'email'     => 'someone@some-site.com',
                   'logged_in' => 1
               );

$this->session->set_userdata($newdata);

会话中有很多你应该记住的东西

See reference here and here

Answer 3

1) 首先 Include Library:

$this->load->library('session');

2) Store data in array which you want to store in session :

$data= array(
                   'username'  => 'username',
                   'password'     => 'password',
                   'email'=>'emailid'
                   'logged_in' => 'login id'
               );

3) 在会话中存储这个数据:

$this->session->set_userdata($data);

您可以随时使用此数据，例如，如果您想要会话中的登录 ID，您可以这样写：

$loginid= $this->session->userdata('logged_in');

登出时：

$this->session->unset_userdata(array("username"=>"","logged_in"=>"","password"=>"","email"=>""));
$this->session->sess_destroy();
redirect('loginpage');

If you don't want to direct access the pages create one model and add this code in it and auto load that model.

public function valid_allowed()//check user is login or not
    {
        $session = $this->session->userdata('username'); //here you can take loginid, email whatever you store in session
        if(!$session)
        {
            redirect('login');
        }
    }

自动加载 模型

转到应用程序->配置->autoload.php：这一行：

$autoload['model'] = array('model name');

更换模型：

<?php
        class LoginModel extends CI_model
        {
            public function login($name, $pass)
            {
                $this->db->select('name,pass');
                $this->db->from('members');
                $this->db->where('name',$name);
                $this->db->where('pass',$pass);     

                $query = $this->db->get();

                if($query->num_rows() == 1)
                {
                    $row=$query->row();
                    $data=array(
                    'username'=>$row->u_username,
                    'id'=>$row->id,
                    'email'=>$row->email
                    'password'=>$row->u_password);
                    $this->session->set_userdata($data);
                    return true;
                }
                else
                {
                    return false;
                }
            }
        }

更改您的 verifyUser 函数：

 public function verifyUser()
                        {
                            $name = $this->input->post('username');
                            $pass = $this->input->post('password');

                            $this->load->model('LoginModel');
                            $result=$this->LoginModel->login($name, $pass))
                         if(!$result)                   
                         {

             $this->form_validation->set_message('verifyUser','Incorrect Email or Pass');
                                return false;
                     redirect('LoginController/checklogin');

                        }
                        else
                        {   
                           redirect('dashboard');   //user is valid so goto dashboard
                        }
}

Answer 4

如果您不断遇到此错误，只需更新您的会话文件：

System/libraries/Session/Session.php

使用最新的在线文件。

如何在登录系统中使用会话并在codeigniter中实现注销

how to use session in login system and implement logout in codeigniter

php

codeigniter

session

login

logout