How to show 404 page in Codeigniter 4?

Although it may seem trivial, I am having difficulty with a question. Previously in Codeigniter 3, I utilized the show_404() function in any controller to display a 404 page. How can I achieve the same outcome in Codeigniter 4?

You can use the following command to display it.

PHP Code:

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


But if you want to use show_404(), you can add the following code in file app/Common.php.

PHP Code:

<?php

use CodeIgniter\Exceptions\PageNotFoundException;

// Show 404 error

if (!function_exists('show_404')) {

    function show_404(string $error_text): string
    {

        throw PageNotFoundException::forPageNotFound($error_text);

    }
} 


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If you want to use CI3 features in CI4, you may find ci-3-to-4-upgrade-helper helpful.
For example, https://github.com/kenjis/ci3-to-4-upgra...on.php#L52

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