Can i check userlogin in construct ?

PHP Code:

class Admin extends CI_Controller {
function __construct()
{
    parent::__construct();
       $aut = $this->donaturlib->is_admin();
    if(!$aut)
    {
$msg="Mohon Maaf anda tidak memiliki akses";
$this->session->set_flashdata('donatur',$msg);
redirect('welcome');
    }
    $this->link ='login/out';
$this->info ='Logout';
}
function index()
{
$data['link']=$this->link;
$data['info']=$this->info;
$data['include']= 'default';
$this->load->view('a_template/main.php',$data);    
}
} 


Up there is my script, i'm trying to check the user login in function __construct. It's working fine, but is it 'in the right way'?

Its ok if you need the client to be logged for all methods inside this controller..

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Thank you for your answer

PHP Code:

class Admin extends CI_Controller {
function __construct()
{
    parent::__construct();
   $aut = $this->donaturlib->is_admin();
    if(!$aut)
    {
$msg="Mohon Maaf anda tidak memiliki akses";
$this->session->set_flashdata('donatur',$msg);
redirect('welcome');
    }
    $this->link ='login/out';
$this->info ='Logout';
}
function index()
{
$data['link']=$this->link;
$data['info']=$this->info;
$data['include']= 'default';
$this->load->view('a_template/main.php',$data); 
}
} 


Up there is my script, i'm trying to check the user login in function __construct. It's working fine, but is it 'in the right way'?

I think the best way is to use hooks, tutorial in spanish(http://uno-de-piera.com/uso-de-hooks-en-codeigniter), regards.

i can't read in spanish haha

Hooks v 2.2 http://www.codeigniter.com/user_guide/ge...hooks.html

Hooks v 3.0 http://www.codeigniter.com/userguide3/ge...hooks.html

I personally prefer extending the CI Controller instead of using a hook about this but it can be a solution if you decide to use it.

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CI_Controller -> Base_Admin_Controller (implement here the user check) -> Admin (the called by the router controller)

AJAX requests may also require authentication, for this case I create lighter Base_Admin_Ajax_Controller, with user check again.