Same tasks in each controller: controller inheritance?

[eluser]xwero[/eluser]
a hook is the most elegant solution in my book. You create/fetch an authentication library and you add a post_controller_constructor hook that uses the authentication library. It can be a function if you want

Code:

function access()
{
  $CI =& get_instance(); // this is the reason why it has to be a post_controller_constructor hook
  $CI->load->library('authentication'); // as a precaution if the library isn't defined in the autoload file
  if($CI->uri->segment(1) == 'admin' && /* I assume the admin has a own directory/controller */
     ! $CI->authentication->logged_in())
  {
     redirect(''); // url helper function
  }
}

I prefer the loose coupling of the hooks better than the extending of controllers.