Online PHP editor | output for 8TQCH

<?php namespace Hostnet\Component\Php7; /** * Simple number */ class Number { private $value; public function __construct($value) { $this->value = $value; } public function getValue() { return $this->value; } } /** * Simple calculator. */ class Calculator { /** * Sum the two arguments. * * @param Number $left the left operant * @param Number $right the right operant * @return Number the answer, the answer is Number(0) when one of the two arguments is null */ public function sum(Number $left = null, Number $right = null) { try { return new Number($left->getValue() + $right->getValue()); } catch (\Error $error) { return new Number(0); } } /** * Divisions two arguments. * * @param Number $left the left operant * @param Number $right the right operant * @return Number the answer, the answer is Number(0) when a devision by zero is made. */ public function division(Number $left, Number $right) { return new Number($left->getValue() / $right->getValue()); } } $item = new Calculator(); $item->sum(null, null);