hooks in codeigniter version 3 - codeigniter

Question

I am using codeigniter 3 .I have enabled hooks in my hooks file
$hook['pre_controller'] = array(
'class' => 'myclass',
'function' => 'myfunction',
'filename' => 'myfile.php',
'filepath' => 'hooks',
'params' => ''
);
on enabling hooks i am getting the error as
`Unable to locate the specified class: Session.php`
Pls help to resolve the above error. i have enabled drivers and libraries in config file.
this is the code i have used in hooks
class Check_login extends CI_Controller
{
public function CheckLoggin()
{
$url = $this->uri->segment(1);
if($url == "givenparameter")
{
$login_id = $this->session->userdata("ID");
$get_url = $this->uri->segment(2);
if($login_id == "" && $get_url != 'login')
{
redirect('controller/login', 'refresh');
}
}
}
}

Answer 1

Hook has a dependency on the session class. So try changing pre_controller hooks to post_controller' like,
$hook['post_controller'] = array(
'class' => 'Myclass',
'function' => 'Myfunction',
'filename' => 'Myfile.php',
'filepath' => 'hooks',
'params' => ''
);
If not works then try post_controller_constructor instead of post_controller

Answer 2

Hooks filepath : application/hooks
controller filename : Blocker.php
class Blocker {
function Blocker(){
}
function requestBlocker(){
echo "done";
}
}
Also, you need to config this.
config path : application/config/hooks.php
$hook['pre_controller'] = array(
'class' => 'Blocker',
'function' => 'requestBlocker',
'filename' => 'Blocker.php',
'filepath' => 'hooks',
'params' => ""
);
Also you need to allow hooks in your configurations. ie. application/config/config.php