Online PHP editor | refs for g3s78

<?php class Amount { private $_list = array(); protected $_number; public function __construct($number) { $this->_number = $number; } public function add(Amount $a) { array_push($this->_list, $this->_number); unset($this->_number); array_push($this->_list, $a->_number); $this->_number += $a->_number; } } $x = new Amount(2); $y = new Amount(3); var_dump($x->add($y));