摘要：<?phpinterface IObserverable{ function register(IObserver $obj); function unregister(IObserver $obj);}interface IObserver{ function show(array $feed);}abstract class FeedObserverable implements IObserverable{ private $_observer_container = array(); public function register(IObserver $... 阅读全文

摘要：1 <?php 2 /** 3 *单件模式 4 */ 5 class Singleton { 6 private static $instance = null; 7 private $_field = null; 8 9 public static function getInstance(){10 if(self::$instance == null)11 self::$instance = new self();12 ... 阅读全文

摘要：面向接口编程用于实现多态性，便于提高软件灵活性和可维护性。<?php/** *定义接口 */interface IDB{ public function connect($host,$port,$user,$password,$db,$charset='GBK'); public function getUserInfo($id); public function postNewFeed($feed);}/** *mysql实现*/class MySQL implements IDB{ public function connect(){... 阅读全文