How to use $this->display () to invoke another class file in a file

What should I do if I use $this->display () to invoke another class file in a file?
A file:

PHP Code

  
   Class indexaction{public    function Index ()    {        echo ' abc ';        $this->display (); This is the line    }}

Class B File:

PHP Code

  
   Class View {public    function display () {        echo ' template output succeeded ';    }}

How to instantiate in order to $this->display () in a file can call another class B file

------Solution--------------------
$this->display ()? This is a strange design.
I'm afraid I have to inherit it. Class Indexaction extends View
Or you can choose the Magic Method __call ()
Now learn to sell:

PHP Code

Class indexaction{    //Add a Magic method public    function __call ($mName, $mArg)    {        $view = new View ();        if (Method_exists ($view, $mName))            Call_user_func (Array ($view, $mName));}    }
