php设计模式-观察者模式
2021-01-17 14:13
标签：highlight user lob observer 观察者 this undo subject 次数 php设计模式-观察者模式 标签：highlight user lob observer 观察者 this undo subject 次数 原文地址：https://www.cnblogs.com/xiangdongsheng/p/13363852.html/**
* 观察对象
* Undocumented class
*/
class User implements SplSubject
{
public $loginCnt;
private $observers;
public function __construct()
{
$this->observers = new SplObjectStorage;
}
public function login()
{
$this->loginCnt = rand(1,30);
$this->notify();
}
public function attach(SplObserver $observer)
{
$this->observers->attach($observer);
}
public function detach(SplObserver $observer)
{
$this->observers->detach($observer);
}
public function notify()
{
foreach($this->observers as $observer) {
$observer->update($this);
}
}
}
/**
* 观察者
* Undocumented class
*/
class Security implements SplObserver
{
public function update(SplSubject $subject)
{
if ($subject->loginCnt > 10) {
echo ‘登录次数过多‘;
} else {
echo ‘登录正常‘;
}
}
}
$user = new User();
$user->attach(new Security());
$user->login();