Helper documentation does not reflect helper functionality

I'm new to CI and using CI3 on a little project to learn it and came up against this issue last night with helpers:

The documentation I'm referencing: http://www.codeigniter.com/user_guide/ge...lpers.html

I have a helper called string_functions and as per the instructions, I named it MY_string_functions.php and placed it in /application/helpers and called it using

PHP Code:

$this->load->helper('string_functions'); 


, but this gave me an error.

Based on the error, I renamed the file string_functions_helper.php, and all is well.

Am I misinterpreting the documentation, or did the method for calling helpers change and the documentation was not updated?

The MY_ is only for extending the core helper classes. All other helper can be named like your string example.

...what Rufnex said... If you wanted, considering that your functions are related to the string manipulation, you could have extended the string helper, by creating MY_string_helper.php

Website: http://avenir.ro

Thank you both!