Yii. How to use your functions in the controller?

Question

Yii

How to write your own functions in the controller so that they can be called from any action?
In principle, I found a solution, but something tells me that it smells of bydlokoding :)
I do it this way. My function inside controller:

public static function myFunction(){
//тело функции
}

You can call it later from any action like this:
MyController::myFunction();
To what extent is this decision correct? And what is the best way to do it?
PS Yii first version

Answer 1

Something prompts to me that it is better (more correctly) to implement the methods in MODEL. This will not conflict with MVC. And already from the controller to call the methods of the model.
It can also be moved to a component.

Answer 2

It's better to use a model to store your functions.
And controllers should be thin.
For example, to get a user by the id of the User model, you can implement it statically:

<?php
class User extends CActiveRecord {
...
static function get($id){
        return self::model()->findByPk($id);
}
...

It will be possible to call as
Just do not confuse static with public