ZF Training ex1

<?php
class Cupboard
{
    protected $_items;

    public function __construct()
    {
        $this->_items = array();
    }

    public function insert($item)
    {
        $this->_items[] = $item;
        return $this;
    }

    public function remove($item)
    {
        if (($key = array_search($item, $this->_items)) !== FALSE) {
            unset($this->_items[$key]);
        }
        return $this;
    }

    public function getAll()
    {
        return $this->_items;
    }
}

$cup = new Cupboard;
var_dump($cup->insert('spoon')->insert('knife')->remove('spoon')->insert('plate')->getAll());
// ['knife', 'plate']