<?php
    class Product{
        private $name;
        private $price;
        private $quantity;

        public function __construct($name,$price,$quantity)
        {
            $this -> name = $name;
            $this -> price = $price;
            $this -> quantity = $quantity;
        }
        public function getName(){
            return $this -> name;
        }
        public function getPrice(){
            return $this -> price;
        }
        public function getQuantity(){
            return $this -> quantity;
        }
        public function getCost(){
            return $this->price * $this -> quantity;
        }
    }
    class Cart{
        public $products = [];

        public function add($products){
            $this -> products[] = $products;
        }
        public function remove($name_remove){
            foreach($this -> products as &$value){
                if($value -> getName() === $name_remove){
                    unset($value);
                }
            }
        }
        public function show(){
            foreach($this->products as $value){
                echo $value->getName()." ".$value->getPrice()."Р. ".$value->getQuantity()." штук</br>";
            }
        }
        public function getTotalQuantity(){
            $sum = 0;
            foreach($this -> products as $value){
                $sum += $value->getQuantity();
            }
            return $sum;
        }
    }
    $cart = new Cart;
    $cart -> add(new Product("Макароны",60,30));
    $cart -> add(new Product("Сосиски",200,40));
    $cart -> add(new Product("Котлеты",180,20));
    $cart -> add(new Product("Рис",55,30));
    $cart -> add(new Product("Гречка",48,20));
    $cart -> remove("Рис");
    $cart -> show();
?>