blocks|key|2987554|text|将其放入帮助器中并自动加载。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2987555|helpers/login_helper.php：|2987556|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;+}
}|code-block|syntax|javascript|2987557|config/autoload.php：|2987558|$autoload['helper']+=+array('login');|2987559|然后在你的控制器中，你可以调用：|2987560|is_logged_in();|2987561|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Put it in a helper and autoload it.

helpers/login_helper.php:

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

config/autoload.php:

<pre><code>$autoload['helper'] = array('login');
</code></pre>

Then in your controller you can call:

<pre><code>is_logged_in();
</code></pre>

blocks|key|1759190|text|另一种选择是创建一个基本控制器。将该函数放在基本控制器中，然后从该控制器继承。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1759191|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。|1759192|class+MY_Controller+extends+Controller
{
++++public+function+__construct()
++++{
++++++++parent::__construct();
++++}

++++public+function+is_logged_in()
++++{
++++++++$user+=+$this->session->userdata('user_data');
++++++++return+isset($user);
++++}
}|code-block|syntax|javascript|1759193|然后让你的控制器继承这个基本控制器。|1759194|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.
++++++++}
++++}
}|1759195|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

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

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

<pre><code>class MY_Controller extends Controller
{
 public function __construct()
 {
 parent::__construct();
 }

 public function is_logged_in()
 {
 $user = $this-&gt;session-&gt;userdata('user_data');
 return isset($user);
 }
}
</code></pre>

Then make your controller inherit from this base controller.

<pre><code>class X extends MY_Controller
{
 public function __construct()
 {
 parent::__construct();
 }

 public function do_something()
 {
 if ($this-&gt;is_logged_in())
 {
 // User is logged in. Do something.
 }
 }
}
</code></pre>

blocks|key|4397139|text|从会话中获取所有用户数据。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4397140|在控制器中，|offset|length|style|BOLD|4397141|$userData+=+$this->session->all_userdata();|code-block|syntax|javascript|4397142|在视图中，|4397143|print_r($userData);|4397144|entityMap^0|0|1|3|0|0|1|2|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@$D|U|E|V|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|W|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|X|8|@$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|O|3|P|5|J|7|10|8|@]|9|@]|A|$K|L]]|$1|Q|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|R|$]]

Get all user's data from session.

In the Controller,

<pre><code>$userData = $this-&gt;session-&gt;all_userdata();
</code></pre>

In the View, 

<pre><code>print_r($userData);
</code></pre>

blocks|key|2987668|text|您可以使用helper和CodeIgniter构造函数来实现这一点。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2987669|2987670|您可以在其中创建编写函数的自定义帮助器my_helper.php|ordered-list-item|2987671|2987672|function+is_logged_in()+{+$user+=+$this->session->userdata('user_data')；if+(!isset($user))+{+return+false；}+else+{+return+true；}}控制器中的|2987673|，如果它的login.php|unordered-list-item|2987674|2987675|类登录扩展了CI_Controller+{+public+function+__construct()+{+parent::__construct()；if(!is_logged_in())+//如果您添加了构造函数，则无需在上面的控制器中编写每个函数。{//重定向您的登录视图}+}|2987676|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|R|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|S|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|T|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$]]|$1|I|3|J|5|K|7|V|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|P|$]]

You can achieve this using helper and CodeIgniter constructor.

<ol>
<li>You can create custom helper my_helper.php in that write your function 

<pre><code>function is_logged_in() {
 $user = $this-&gt;session-&gt;userdata('user_data');
 if (!isset($user)) { 
 return false; 
 } 
 else { 
 return true;
 }
} 
</code></pre></li>
<li>In controller if its login.php

<pre><code>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
 }
 }
</code></pre></li>
</ol>

blocks|key|1012877|text|我认为使用钩子非常简单。只需创建一个钩子来检查$this->session->user即可。它将在每个请求中被调用。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1012878|entityMap^0|N|K|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

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

blocks|key|1012895|text|只需在function+__construct()的文件夹核心文件ci_controller中添加以下代码，即可检查所有控制器()：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1012896|function+__construct()+
{
++++parent::__construct();
++++if(!+$user+=+$this->session->userdata('user_data');)
++++{
+++++++++return+false;
++++}
}|code-block|syntax|javascript|1012897|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

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

<pre><code>function __construct() 
{
 parent::__construct();
 if(! $user = $this-&gt;session-&gt;userdata('user_data');)
 {
 return false;
 }
}
</code></pre>

blocks|key|1759255|text|我根据上面的答案编写了如下代码。这是为我运行的创建文件my_helper.php|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1759256|<?php+
++++function+_is_logged_in()+{
++++++++if(isset($_SESSION['username'])){
++++++++++++return+true;++++++++
++++++++}+else+{
++++++++++++return+false;
++++++++}
++++}
?>|code-block|syntax|javascript|1759257|在autoload.php文件中编辑|1759258|$autoload['helper']+=+array('my');|1759259|在您的Controller文件中|1759260|class+Welcome+extends+CI_Controller+{

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

++++++++if(!_is_logged_in())++
++++++++{
++++++++++++redirect("Login");
++++++++}
++++}
}|1759261|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

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

<pre><code>&lt;?php 
 function _is_logged_in() {
 if(isset($_SESSION['username'])){
 return true; 
 } else {
 return false;
 }
 }
?&gt;
</code></pre>

Edit in autoload.php file

<pre><code>$autoload['helper'] = array('my');
</code></pre>

In your Controller file

<pre><code>class Welcome extends CI_Controller {

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

 if(!_is_logged_in()) 
 {
 redirect("Login");
 }
 }
}
</code></pre>

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

<pre><code>function _is_logged_in() {

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

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

}
</code></pre>

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'.

Any ideas?

codeigniter check for user session in every controller

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我在我的一个控制器中有一个私人会话，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...

问对每个控制器中的用户会话进行codeigniter检查
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问对每个控制器中的用户会话进行codeigniter检查EN