#!/usr/bin/php
<?php
class Car
{
public $color;
}
class Garage
{
public function paint(Car $car, $color)
{
$car->color = $color;
}
}
$car1 = new Car();
$garage = new Garage();
$car1->color = "blue";
echo $car1->color;
echo "\n";
$garage->paint($car1, "green");
echo $car1->color;
// Displays “green”
echo "\n";
$cat = 'tom';
$garage = new Garage();
$garage->paint($cat, 'red');
