Code from oop book 2

<?php

class fruit{
  public $name;
  public $color;

  function set_name($n){
    $this->name = $n;
    echo $this->name;
  }

  protected function set_color($c){
    $this->color = $c;
    echo $this->color;
  }
}

class fruit2 extends fruit{
  public function get_color(){
    echo $this->set_color();
  }
}

$obj = new fruit();
echo $obj->set_name("Banana")."<br>";

$obj2 = new fruit2();

$obj2->set_name("Yellow");


?>