{
echo "'{$args}' send to UserListLogger\n";
}
public function getName()
{
return 'UserListLogger';
}
}
class OtherObserver implements IObserver
{
public function onSendMsg($sender, $args)
{
echo "'{$args}' send to OtherObserver\n";
}
public function getName()
{
return 'OtherObserver';
}
}
$ul = new UserList();
//被观察者
$ul->addObserver(new UserListLogger());
//增加观察者
$ul->addObserver(new OtherObserver());
//增加观察者
$ul->sendMsg("Jack");
//发送消息到观察者
$ul->removeObserver('UserListLogger');
//移除观察者
$ul->sendMsg("hello");
//发送消息到观察者
