Codeigniter Check for User Session in Every Controller

codeigniter check for user session in every controller

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.

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.

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.
        }
    }
}

Codeigniter - set/check session in every controller function

You can use a hook : http://ellislab.com/codeigniter/user-guide/general/hooks.html

Or you can code your small script into the construct of your controllers.

function __construct()
{
    parent::__construct();
    //Put your code here, you can also load your models and stuff
    //$this->load->model("user_model","user");
    //Code code code
}

And here is an example of a hook for i18n (language module) -- Create a file under applications/hooks/my_hook.php

function setUserLang()
{
//Getting the language of the user
//If nothing was found, stick with English
$ci =& get_instance();
if(!$ci->session->userdata('lang')){
    $lang = substr($_SERVER['HTTP_ACCEPT_LANGUAGE'], 0, 2);
    switch ($lang){
        case "fr":
            $ci->session->set_userdata('lang','french');
            break;

        case "en":
            $ci->session->set_userdata('lang','english');
            break;

        default:
            $ci->session->set_userdata('lang','english');
            break;
    }
}
}

And go to applications/config/hooks.php and add something like :

$hook['post_controller_constructor'][] = array(
            'class'     => '',
            'function'  => 'setUserLang',
            'filename'  => 'my_hook.php',
            'filepath'  => 'hooks'
            );

CodeIgniter check sessions in every controller?

Create a MY_Controller in the application/core folder which extends CI_Controller. Place your session functions in the MY_Controller file and then have the rest of your controllers extend MY_Controller instead of CI_Controller.

CodeIgniter - How to check session to be used at every methods

Create a file called MY_controller.php (the prefix can be edited in config file) in /application/core:

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class MY_Controller extends CI_Controller {

    function __construct()
    {

        parent::__construct();

        //Initialization code that affects all controllers
    }

}

class Public_Controller extends MY_Controller {

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

        //Initialization code that affects Public controllers. Probably not much needed because everyone can access public.
    }

}

class Admin_Controller extends MY_Controller {

    function __construct()
    {
        parent::__construct();
        //Initialization code that affects Admin controllers I.E. redirect and die if not logged in or not an admin
    }

}

class Member_Controller extends MY_Controller {

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

        //Initialization code that affects Member controllers. I.E. redirect and die if not logged in
    }

}

Then anytime you create a new controller, you decide what access it requires

    class Book extends Member_Controller {

        //Code that will be executed, no need to check anywhere if the user is logged in. 
        //The user is guaranteed to be logged in if we are executing code here.

//If you define a __construct() here, remember to call parent::__construct();
    }

This cuts code duplication a lot, since if you need another member controller other than Book you can just extend the Member_Controller. Instead of having to do the checks in all of them.

CodeIgniter: checking if user logged in for multiple pages

You can run code in every method of a Controller by running it in the __construct() method:

function __construct()
{
    parent::__construct();
    if ( ! $this->session->userdata('logged_in'))
    { 
        // Allow some methods?
        $allowed = array(
            'some_method_in_this_controller',
            'other_method_in_this_controller',
        );
        if ( ! in_array($this->router->fetch_method(), $allowed)
        {
            redirect('login');
        }
    }
}

You can remove the "allowed" bits if you want to restrict access to the whole thing, but there are better ways to do this, like creating a base controller:

// Create file application/core/MY_Controller.php
class Auth_Controller extends CI_Controller {

    function __construct()
    {
        parent::__construct();
        if ( ! $this->session->userdata('logged_in'))
        { 
            redirect('login');
        }
    }
}

Then have your restricted controllers extend Auth_Controller instead of CI_Controller. Now your code will be run every time the controller is loaded.

More info on extending core classes: http://www.codeigniter.com/user_guide/general/core_classes.html#extending-core-class

Also of interest: http://php.net/manual/en/language.oop5.decon.php

Codeigniter show controller if session exists

You put the session $this->session->userdata('is_logged_in') condition in __construct()

Like this :

<?php
class Lists extends CI_Controller {

    public function __construct() {
        parent::__construct();
        if($this->session->userdata('is_logged_in') != 1) { 
            //redirect code here
        }
    }

    public function index() {
        $this->load->view('lists');}
    }
}

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