<?php
namespace script;
use script\Observer;
//观察者处理类
class ObserverBase
{
 /**
 * 添加观察者
 */
 private $objs = [];
 public function add(Observer $obj)
 {
 $this->objs[] = $obj;
 }
 /**
 * 执行观察者得操作
 */
 public function notify()
 {
 foreach ($this->objs as $value) {
 $value->update();
 }
 }
 //在对象销毁时执行观察者逻辑
 public function __destruct()
 {
 $this->notify();
 }
 
}