4-6-1.php //多态 interface User{ // User接口 public function getName(); public function setName($_name); } class NormalUser implements User { // 实现接口的类. private $name; public function getName(){ return $this->name; } public function setName($_name){ $this->name = $_name; } } class UserAdmin{ //操作. public static function ChangeUserName(User $_user,$_userName){ $_user->setName($_userName); } } $normalUser = new NormalUser(); UserAdmin::ChangeUserName($normalUser,"Tom");//这里传入的是 NormalUser的实例. echo $normalUser->getName(); ?>
