gistfile1.txt

<?php
class BasePost {
  public $id;
  public $title;
  public $description;
  
  public function save($datas) {
    $this->connectdb();
    $this->insert($datas);
  }

}

class Post extends BasePost {
  
  public $categories;
  
  public function getCategories() {
    return $this->categories;  
  }

}

class Page extends BasePost {
  
  public $order_number;
  
  public function setOrder($order_number) {
    $this->orderNumber = $order_number;
  }
  
}