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<?php class MilkTea { private $name = '奶茶'; private $price = 3; public function setName($prefix) { $this->name = $prefix . $this->name; } public function setPrice($price) { $this->price += $price; } public function info() { echo $this->name . '售价' . $this->price . '元'; echo '<br>'; } } abstract class Decoration { abstract public function addDecoration(MilkTea $milkTea); } class PearlDecoration extends Decoration { public function addDecoration(MilkTea $milkTea) { $milkTea->setName('珍珠'); $milkTea->setPrice(2); } } class RedBeanDecoration extends Decoration { public function addDecoration(MilkTea $milkTea) { $milkTea->setName('红豆'); $milkTea->setPrice(2); } } $milkTea = new MilkTea(); $milkTea->info(); $pearlDecoration = new PearlDecoration(); $pearlDecoration->addDecoration($milkTea); $milkTea->info(); $redBeanDecoration = new RedBeanDecoration(); $redBeanDecoration->addDecoration($milkTea); $milkTea->info(); //第一次输出：奶茶售价3元，加了珍珠（装饰）后输出：珍珠奶茶售价5元，加了红豆（装饰）后输出：红豆珍珠奶茶售价7元 |
