How to daisy chain php classes

Question

I want to do this.

$ppl->tech->ceo->apple();

How would I make that work?

Answer 1

For example:

class ppl {
  public $tech;

  public function __construct(){
    $this->tech = new tech();
  }
}

class tech {
  public $ceo;

  public function __construct(){
    $this->ceo = new ceo();
  }
}

class ceo {
  public function __construct(){

  }

  public function apple(){
    echo 'Hello.. I\'m apple.';
  }
}