####观察者模式* 设计观察者是为了让一个对象跟踪某个状态,知道状态如何改变,一旦状态改变,所有订阅的对象都能得到通知#####使用SPL实现观察者模式* Splsubject 接口有三个抽象方法 attach(),detach(),notify()这些方法不返回任何结果* SplObserver 接口有一个方法update()它会得到subject状态的最新状态并交给观察者实例* SplObjectStorage 类描述为从对象到数据或对象集的一个映射```observers = new SplObjectStorage(); } //添加观察者 public function attach(\SplObserver $observer){ $this->observers->attach($observer); } //删除观察者 public function detach(\SplObserver $observer){ $this->observers->detach($observer); } //通知转发 public function notify(){ foreach($this->observers as $observer){ $observer->update($this); } } //设置数据 public function setData($dataNow){ $this->data = $dataNow; } public function getData(){ return $this->data; }}//SPL具体观察者class ConcreteObserver implements SplObserver{ public function update(SplSubject $subject) { echo $subject->getData(); }}class Client{ public function __construct() { echo " create three new concrete observers "; //创建观察者 $ob1 = new concreteobserver(); $ob2 = new concreteobserver(); $ob3 = new concreteobserver(); $subject = new concretesubject(); $subject->setobservers(); $subject->setdata("here is u data".""); $subject->attach($ob1); $subject->attach($ob2); $subject->attach($ob3); $subject->notify(); echo "
reset data and reattach ob3
"; $subject->setData("more data that only".""); $subject->attach($ob3); $subject->attach($ob2); $subject->notify(); }}$data = new Client();```#####自由的PHP和观察者模式```observers,$obser); } public function detachObser(Observer $obser){ //从数组中移除 数据 $position = 0; foreach($this->observers as $viwer){ ++$position; if($viwer == $obser){ array_splice($this->observers,($position),1); } } } public function notify(){ foreach($this->observers as $viewer){ //调用update方法 $viewer->update($this); } }}class ConcreteSubject extends Subject{ public function setState($stateSet){ $this->stateNow = $stateSet; } public function getState(){ return $this->stateNow; }}class ConcreteObserverDT implements Observer{ private $currentState; public function update(Subject $subject) { $this->currentState = $subject->getState(); echo "DT"; }}class ConcreObserverTablet implements Observer{ private $currentState; public function update(Subject $subject) { $this->currentState = $subject->getState(); echo "tablet"; }}class ConcreObserverPhone implements Observer{ private $currentState; public function update(Subject $subject) { $this->currentState = $subject->getState(); echo "phone"; }}class Client{ public function __construct() { $sub = new ConcreteSubject(); $ob1 = new ConcreObserverPhone(); $ob2 = new ConcreObserverTablet(); $ob3 = new ConcreteObserverDT(); $sub->attachObser($ob1); $sub->attachObser($ob2); $sub->attachObser($ob3); $sub->setState("fuck"); $sub->detachObser($ob1); $sub->notify(); }}$data = new Client();```
破浪分红权返利系统基础版
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破浪分红权返利系统是在破浪直销系统的基础上独立自主开发的一套稳定完善的购物商场网站管理系统，系统基于PHP+MYSQL开发，集购物商城、积分商城、商家联盟、会员营销机制等一体，模板与程序分离，集成网上支付，嵌入型短信应用API集成，使用简单、功能强大，多种返现模式可自由选择，为广大创业者者提供一个快速、高效、稳定、安全的电子商务系统。系统集O2O\C2C\B2C\B2B2C以及直销、分红、代理、分
