小孩和公共设施
用继承的方法:
class Sanitation{ public function Washhands(){ echo "Cleaning!"; } } class Child extends Sanitation{ } $child=new Child(); $child->Washhands();
委托关系:
class Sanitation{ public function Washhands(){ echo "Cleaning!"; } } class Child { private $sanitation; function __construct(){ $this->sanitation=new Sanitation(); } public function Washhands(){ return $this->sanitation->Washhands(); } } $child=new Child(); $child->Washhands();
继承和委托关系
时间: 2024-08-11 05:45:35