public function testObserver()
{
$subject = new ConcreteSubject();
$subject->attach(new ConcreteObserver());
$subject->attach(new ConcreteObserver());
$subject->attach($c = new ConcreteObserver());
$subject->state = "New State...";
$subject->Notify();
$this->assertEquals($subject->state, $c->state);
}
public function __construct()
{
echo "Tworzenie 3 konkretnych obserwatorów i konkretnego podmiotu <BR>";
$ob1 = new ConcreteObserver();
$ob2 = new ConcreteObserver();
$ob3 = new ConcreteObserver();
$subject = new ConcreteSubject();
$subject->setObservers();
$subject->setData("Oto twoje dane!");
$subject->attach($ob1);
$subject->attach($ob2);
$subject->attach($ob3);
$subject->notify();
echo "Odpięcie obserwatora ob3. Powiadamiane będą ob1 i ob2<BR>";
$subject->detach($ob3);
$subject->notify();
echo "Reset danych, podpięcie ob3 i dopięcie ob2, tylko ob1 i ob3 będą powiadamiane: <BR>";
$subject->setData("Dane dla obiektów ob1 i ob3");
$subject->attach($ob3);
$subject->detach($ob2);
$subject->notify();
}
public function update(SplSubject $subject)
{
echo 'ConcreteObserver2 state is ', $subject->getState(), '<br>';
}
}
/**
* 具体观察者 3
*
*/
class ConcreteObserver3 extends bserver implements SplObserver
{
function __construct($state)
{
parent::__construct($state);
}
public function update(SplSubject $subject)
{
echo 'ConcreteObserver3 state is ', $subject->getState(), '<br>';
}
}
$subject = new ConcreteSubject();
$observer1 = new ConcreteObserver1(1);
$observer2 = new ConcreteObserver2(2);
$observer3 = new ConcreteObserver3(3);
$subject->attach($observer1);
$subject->attach($observer2);
$subject->attach($observer3);
echo 'Subject state is 1', '<br>';
$subject->setState(1);
echo 'Subject state is 2', '<br>';
$subject->setState(3);
* 具体通知者类
*/
class ConcreteSubject extends Subject
{
public $state;
}
/*
* 具体观察者
*/
class ConcreteObserver extends Observer
{
private $_name;
private $_subject;
public function __construct($name, Subject $subject)
{
$this->_name = $name;
$this->_subject = $subject;
}
public function update()
{
var_dump(sprintf('观察者：%s，通知者的状态是：%s，请做出相应的反应。', $this->_name, $this->_subject->state));
}
}
###################################################################################
$concreteSubject = new ConcreteSubject();
//通知者
$concreteObserver = new ConcreteObserver('张三', $concreteSubject);
//观察者
$concreteSubject->attach($concreteObserver);
$concreteSubject->state = 'abc';
$concreteSubject->notify();
/**
* Main program.
*/
public static function main()
{
$subject = new ConcreteSubject();
/* 添加第一个观察者 */
$observer1 = new ConcreteObserver("Martin");
$subject->attach($observer1);
echo "\nThe First notify:\n";
$subject->notifyObservers();
/* 添加第二个观察者 */
$observer2 = new ConcreteObserver("phppan");
$subject->attach($observer2);
echo "\nThe Second notify:\n";
$subject->notifyObservers();
/* 删除第一个观察者 */
$subject->detach($observer1);
echo "\nThe Third notify:\n";
$subject->notifyObservers();
}