cart_bad_code_demeter_law.php

<?php
  class Cart {
    private $owner;
    private $items;
    
    public function __construct($owner, $items) {
      $this->owner = $owner;
      $this->items = $items;
    }
    
    public function totalValueOfItems() {
      $total = 0;
      foreach ($this->items as $item) {
        $total += $item->getProduct()->getValue() * $item->getQuantity();
      }
      return $total;
    }
  }
?>