Online PHP editor | refs for 5Sh04

<?php $fruitpacks = [ ['apples', 3], ['pears', 1], ['apples', 6], ['grapes', 22], ]; final class Basket { private $items; private function __construct(array $items) { $this->items = $items; } public function add(string $name, int $quantity) : self { return new self([$name => $quantity + ($this->items[$name] ?? 0)] + $this->items); } public function asArray() : array { return $this->items; } public static function empty() : self { return new self([]); } public static function addToBasket(self $basket, array $item) : self { return $basket->add(...$item); } } var_dump(array_reduce($fruitpacks, [Basket::class, 'addToBasket'], Basket::empty())->asArray());