Loading a custom helper

Hello,

I am new to CodeIgniter 4.

How to load a helper?

I read here: https://codeigniter.com/user_guide/general/helpers.html

it says use the following:

PHP Code:

helper('name'); 


What I did, is that I have a file in app/Helpers/name.php with the function name set to name() and I am using the function in a controller that is extending to controller then it is not working.

It says:

Call to undefined function