Codeigniter用户登录检查 [英] Codeigniter Users Login Check

问题描述

我是Code Igniter的新手，我正在建立自己的用户系统。我真的在登录过程，我已经实施了一个检查用户是否当前登录。

I'm a novice with Code Igniter and I'm currently building my own user system. I'm curretly on the login process and I have implemented a check for whether a user is currently logged in or not.

在我的标题中，我想显示一个链接，如果他们已经登录，注销，或登录，如果他们没有当前登录。

In my header I then want to display a link to 'Log Out' if they are already logged in, or 'Log In' if they are not logged in currently.

我在索引控制器中有一个工作函数，如下所示，$ loginstatus变量发送到我的页眉视图：

I have a working function in my index controller as follows, the $loginstatus variable is sent to the my page header view:

function check_session()
{
    //Check session status

            $session = $this->session->userdata('login_state'); 

            $default = "Log In";

            if ($session == 1) 
            {
                $url = site_url('index.php/users/logout'); 
                $status = "Log Out";



            } 
            else 
            {
                $url = site_url('index.php/users/login'); 
                $status = $default;
            }

        $loginstatus = array(
                        "url" => $url,
                        "status" => $status 
                        );

        return $loginstatus;
}

因为目前只有在索引控制器中，$ loginstatus不会生成其他页面的头部视图，这是我的问题。

Because it is currently only in the index controller the $loginstatus is not generated for the header view for other pages and this is my problem.

我在哪里放置这个函数，以便它总是加载在我的标题之前？我试着创建一个具有'Common'类的库，然后自动加载，但我结束了很多问题。

Where would I put this function so that it always loads before my header? I tried creating a libary with a 'Common' class and then autoloading that but I ended up with lots of problems.

提前感谢。

推荐答案

如果您使用CI version bellow 2.0，则在application / libraries / MY_Controller.php中创建新类，否则在应用程序/ core / MY_Controller.php和所有的应用程序控制器应该从它延伸。在此类中的__construct方法中，您将检查登录状态并将其发送到视图。

If you are using CI version bellow 2.0 then create new class in application/libraries/MY_Controller.php, otherwise in application/core/MY_Controller.php and all of your application controllers should extend from it. In this class in the __construct method you will check for the login status and send it to the views.

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

        //Get the status which is array
        $login_status = $this->check_session();

        //Send it to the views, it will be available everywhere

        //The "load" refers to the CI_Loader library and vars is the method from that library.
        //This means that $login_status which you previously set will be available in your views as $loginstatus since the array key below is called loginstatus.
        $this->load->vars(array('loginstatus' => $login_status));
    }

    protected function check_session()
    {
        //Here goes your function
    }
}

同时确保您的应用程序控制器从此类扩展

Also make sure your application controllers extend from this class

//application/controllers/index.php

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

在你的视图中你可以这样做：
< a href = <？php echo $ loginstatus ['url'];？>><？php echo $ loginstatus ['status']; ？< / a>

In your views you can do this: <a href="<?php echo $loginstatus['url']; ?>"><?php echo $loginstatus['status']; ?></a>

这可能是因为CI_Loader vars（）方法正在执行提取到传递给它的参数。

This is possible cause the CI_Loader vars() method is doing extract to the parameters passed to it.

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