How to show 404 whenever/wherever I want

Hello. In my site I have some pages that I only want a logged in administrator to see. If the admin is not logged in I don't want to show the typical login page or some error, I want to show error 404. In CodeIgniter 3 we could type show_404() wherever we wanted in the controller - and as soon as the code got to it - bam! 404. How can I do this in CI 4?

You can see things I made with codeigniter here: itart.pro its not overly impressive as I have very little time to learn.

Hello. In my site I have some pages that I only want a logged in administrator to see. If the admin is not logged in I don't want to show the typical login page or some error, I want to show error 404. In CodeIgniter 3 we could type show_404() wherever we wanted in the controller - and as soon as the code got to it - bam! 404. How can I do this in CI 4?

I believe this should meet ...

PHP Code:

if  //anything you want
    {
 return redirect()->to('/errors/nodata');
 exit;
 }
 
 //my 404 page is customized. 


That code does't work for me. The whole syntax
return redirect()->to('/wherever');
is not working for me, at least not in that controller. But even if it did wouldn't it just redirect to /errors/nodata ??
I don't want to redirect though. I just want to show 404 page not found with the uri they were trying to access.

Scenario: They are an unauthorized user probing through my site, theres a url called /edit_products - that should only be viewable by admins.
If they are unauthorized as an admin they see 404 on that link.

You can see things I made with codeigniter here: itart.pro its not overly impressive as I have very little time to learn.

That code does't work for me. The whole syntax
return redirect()->to('/wherever');
is not working for me, at least not in that controller. But even if it did wouldn't it just redirect to /errors/nodata ??
I don't want to redirect though. I just want to show 404 page not found with the uri they were trying to access.

Scenario: They are an unauthorized user probing through my site, theres a url called /edit_products - that should only be viewable by admins.
If they are unauthorized as an admin they see 404 on that link.

There are options through .htaccess, also.

/errors/nodata => It was just an example, I don't know if 404 routing is customized by you.
I warned you that my 404 page is customized.
I changed the router configuration in app/config/routes.php

PHP Code:

$routes->setDefaultNamespace('App\Controllers');
$routes->setDefaultController('Home');
$routes->setDefaultMethod('index');
$routes->setTranslateURIDashes(false);
$routes->set404Override(function()  // <= changed
{
    $header = array (
    'icon' => 'favicon',
    'css' => 'nodata',
    'title' => 'Page not found - wdeda',
    'placeholder' => 'Search'
    );
    
    echo view('templates/headerr', $header);
    echo view('/content/error_404');
    echo view('templates/footer');
    });
$routes->setAutoRoute(true); 


Thanks, I made a custom 404 too with your router example.
But still, how do I show some users 404 and others the real content - without changing the url...

.htaccess options? What kind of options?

You can see things I made with codeigniter here: itart.pro its not overly impressive as I have very little time to learn.

Once you've customised your response, can't you simply invoke it by using 'throw'?

Once you've customised your response, can't you simply invoke it by using 'throw'?

Errr...that sounds promising. Customize response and throw it..I will try it when I figure out how...

You can see things I made with codeigniter here: itart.pro its not overly impressive as I have very little time to learn.

@gary's suggestion can help:

  https://codeigniter.com/user_guide/incom...llers.html

https://codeigniter.com/user_guide/incom...lters.html

https://codeigniter.com/user_guide/gener...exceptions

throw \CodeIgniter\Exceptions\PageNotFoundException::forPageNotFound('WTF');

https://codeigniter.com/user_guide/gener...exceptions

 Great! Meanwhile I was reading this... https://codeigniter.com/user_guide/outgo...ponse.html, and completely missed error handling of the guide.

Thank YOU kind sir! 

You can see things I made with codeigniter here: itart.pro its not overly impressive as I have very little time to learn.