php codeigniter 检查每个控制器中的用户会话

codeigniter check for user session in every controller

提问by Stephen Curran

I have this private session in one of my controllers that checks if a user is logged in:

我在我的一个控制器中有这个私人会话，用于检查用户是否登录：

function _is_logged_in() {

   $user = $this->session->userdata('user_data');

   if (!isset($user)) { 
      return false; 
   } 
   else { 
      return true;
   }

}

Problem is that I have more than one Controller. How can I use this function in those other controllers? Redefining the function in every Controller isn't very 'DRY'.

问题是我有不止一个控制器。如何在其他控制器中使用此功能？在每个控制器中重新定义功能并不是很“枯燥”。

Any ideas?

有任何想法吗？

回答by Stephen Curran

Another option is to create a base controller. Place the function in the base controller and then inherit from this.

另一种选择是创建一个基本控制器。将函数放在基本控制器中，然后从中继承。

To achieve this in CodeIgniter, create a file called MY_Controller.php in the libraries folder of your application.

要在 CodeIgniter 中实现这一点，请在应用程序的库文件夹中创建一个名为 MY_Controller.php 的文件。

class MY_Controller extends Controller
{
    public function __construct()
    {
        parent::__construct();
    }

    public function is_logged_in()
    {
        $user = $this->session->userdata('user_data');
        return isset($user);
    }
}

Then make your controller inherit from this base controller.

然后让你的控制器从这个基本控制器继承。

class X extends MY_Controller
{
    public function __construct()
    {
        parent::__construct();
    }

    public function do_something()
    {
        if ($this->is_logged_in())
        {
            // User is logged in.  Do something.
        }
    }
}

回答by Rocket Hazmat

Put it in a helper and autoload it.

把它放在一个助手中并自动加载它。

helpers/login_helper.php:

helpers/login_helper.php：

function is_logged_in() {
    // Get current CodeIgniter instance
    $CI =& get_instance();
    // We need to use $CI->session instead of $this->session
    $user = $CI->session->userdata('user_data');
    if (!isset($user)) { return false; } else { return true; }
}

config/autoload.php:

配置/自动加载.php：

$autoload['helper'] = array('login');

Then in your controller you can call:

然后在您的控制器中，您可以调用：

is_logged_in();

回答by prash.patil

You can achieve this using helper and CodeIgniter constructor.

您可以使用 helper 和 CodeIgniter 构造函数来实现这一点。

1. You can create custom helper my_helper.php in that write your function

   function is_logged_in() {
     $user = $this->session->userdata('user_data');
     if (!isset($user)) { 
      return false; 
     } 
    else { 
      return true;
    }
   } 
   

2. In controller if its login.php

   class Login extends CI_Controller {
   
       public function __construct()
       {
           parent::__construct();
           if(!is_logged_in())  // if you add in constructor no need write each function in above controller. 
           {
            //redirect you login view
           }
       }
   

1. 您可以在编写函数时创建自定义助手 my_helper.php

   function is_logged_in() {
     $user = $this->session->userdata('user_data');
     if (!isset($user)) { 
      return false; 
     } 
    else { 
      return true;
    }
   } 
   

2. 在控制器中，如果它的 login.php

   class Login extends CI_Controller {
   
       public function __construct()
       {
           parent::__construct();
           if(!is_logged_in())  // if you add in constructor no need write each function in above controller. 
           {
            //redirect you login view
           }
       }
   

回答by Rakesh

I think using hooks is pretty easy. Just create a hook to check $this->session->user. It will be called in every request.

我认为使用钩子很容易。只需创建一个钩子来检查$this->session->user。它将在每个请求中调用。

回答by Huseyin

I coded like this according to above answers.. And this is running for me Create file my_helper.php

我根据上面的答案这样编码..这是为我运行创建文件 my_helper.php

<?php 
    function _is_logged_in() {
        if(isset($_SESSION['username'])){
            return true;        
        } else {
            return false;
        }
    }
?>

Edit in autoload.php file

在 autoload.php 文件中编辑

$autoload['helper'] = array('my');

In your Controller file

在您的控制器文件中

class Welcome extends CI_Controller {

    public function __construct(){
        parent::__construct();

        if(!_is_logged_in())  
        {
            redirect("Login");
        }
    }
}

回答by Sumith Harshan

Get all user's data from session.

从会话中获取所有用户的数据。

In the Controller,

在控制器中，

$userData = $this->session->all_userdata();

In the View,

在视图中，

print_r($userData);

回答by indonesia-dennis

Just add this on your folder core file ci_controller at function __construct() to check all controller ():

只需将其添加到您的文件夹核心文件 ci_controller 函数 __construct() 中即可检查所有控制器 ()：

function __construct() 
{
    parent::__construct();
    if(! $user = $this->session->userdata('user_data');)
    {
         return false;
    }
}