}
// 烹煮食材
public function cooking()
{
echo "將蛋及肉煎熟、生菜及小黃瓜切絲，平均放在烤好的土司上夾起來\n";
}
// 上菜
public function serve()
{
echo "吐司對切放在盤子上即可\n";
}
}
$sandwich = new Sandwich();
$sandwich->prepareIngredient();
$sandwich->cooking();
$sandwich->serve();
/**
* 廚師工廠
*/
class ChefFactory
{
/**
* 聘請廚師
*/
public static function hireChef($meal)
{
switch ($meal) {
// 咖哩廚師
case 'curry':
return new Curry();
break;
