Why are different methods used to obtain the variables on the controller when model and view are loaded in the CI framework?

On the model, the following code is used to obtain the variables on the controller: {code ...} however, when loading the view, in order to obtain the variables on the controller, I chose to link all the variables on the controller to the loader: {code ...} why have we selected different parties for the same purpose... on the model, the following code is used to obtain the variables on the controller:

public function __get($key){    return get_instance()->$key;}

However, when loading the view, in order to obtain the variables on the controller, we chose to link all the variables on the controller to the loader:

$_ci_CI =& get_instance();foreach (get_object_vars($_ci_CI) as $_ci_key => $_ci_var){    if ( ! isset($this->$_ci_key))    {       $this->$_ci_key =& $_ci_CI->$_ci_key;    }}

Why did I select different methods for the same purpose? I think the method corresponding to the model is already very good.

Reply content:

On the model, the following code is used to obtain the variables on the controller:

public function __get($key){    return get_instance()->$key;}

However, when loading the view, in order to obtain the variables on the controller, we chose to link all the variables on the controller to the loader:

$_ci_CI =& get_instance();foreach (get_object_vars($_ci_CI) as $_ci_key => $_ci_var){    if ( ! isset($this->$_ci_key))    {       $this->$_ci_key =& $_ci_CI->$_ci_key;    }}

Why did I select different methods for the same purpose? I think the method corresponding to the model is already very good.