<?php /* * 设计模式练习 * 1.数据库连接类（单例模式） * 2.调用接口实现留言本功能（工厂模式） * 3.实现分级举报处理功能（责任链模式） * 4.发送不同组合的举报信息（桥接模式） * 5.发送不同格式的举报信息（适配器模式） * 6.在投诉内容后自动追加时间（装饰器模式） * 7.根据会员登录信息变换显示风格（观察者模式） * 8.根据发帖长度加经验值（策略模式） */ interface DB { function conn(); } /** * 单例模式 */ class MysqlSingle implements DB { protected static $_instance = NULL; public static function getInstance() { if (!self::$_instance instanceof self) { self::$_instance = new self; } return self::$_instance; } final protected function __construct() { echo 'Mysql单例创建成功<br>'; } final protected function __clone() { return false; } public function conn() { echo 'Mysql连接成功<br>'; } } /** * 工厂模式 */ interface Factory { function createDB(); } class MysqlFactory implements Factory { public function createDB() { echo 'Mysql工厂创建成功<br>'; return MysqlSingle::getInstance(); } } /** * 根据用户名显示不同风格 * 观察者模式 */ class Observer implements SplSubject { protected $_observers = NULL; public $_style = NULL; public function __construct($style) { $this->_style = $style; $this->_observers = new SplObjectStorage(); } public function show() { $this->notify(); } public function attach(SplObserver $observer) { $this->_observers->attach($observer); } public function detach(SplObserver $observer) { $this->_observers->detach($observer); } public function notify() { $this->_observers->rewind(); while ($this->_observers->valid()) { $observer = $this->_observers->current(); $observer->update($this); $this->_observers->next(); } } } class StyleA implements SplObserver { public function update(SplSubject $subject) { echo $subject->_style . ' 模块A<br>'; } } class StyleB implements SplObserver { public function update(SplSubject $subject) { echo $subject->_style . ' 模块B<br>'; } } /** * 根据不同方式进行投诉 * 桥接模式 */ class Bridge { protected $_obj = NULL; public function __construct($obj) { $this->_obj = $obj; } public function msg($type) { } public function show() { $this->msg(); $this->_obj->msg(); } } class BridgeEmail extends Bridge { public function msg() { echo 'Email>>'; } } class BridgeSms extends Bridge { public function msg() { echo 'Sms>>'; } } class Normal { public function msg() { echo 'Normal<br>'; } } class Danger { public function msg() { echo 'Danger<br>'; } } /** * 适配器模式 */ class Serialize { public $content = NULL; public function __construct($content) { $this->content = serialize($content); } public function show() { return '序列化格式：<br>' . $this->content; } } class JsonAdapter extends Serialize { public function __construct($content) { parent::__construct($content); $tmp = unserialize($this->content); $this->content = json_encode($tmp, TRUE); } public function show() { return 'Json格式：<br>' . $this->content; } } /** * 在投诉内容后自动追加 * 装饰器模式 */ class Base { protected $_content = NULL; public function __construct($content) { $this->_content = $content; } public function getContent() { return $this->_content; } } class Decorator { private $_base = NULL; public function __construct(Base $base) { $this->_base = $base; } public function show() { return $this->_base->getContent() . '>>系统时间：' . date('Y-m-d H:i:s', time()); } } /** * 分级举报处理功能 * 责任链模式 */ class level1 { protected $_level = 1; protected $_top = 'Level2'; public function deal($level) { if ($level <= $this->_level) { echo '处理级别：1<br>'; return; } $top = new $this->_top; $top->deal($level); } } class level2 { protected $_level = 2; protected $_top = 'Level3'; public function deal($level) { if ($level <= $this->_level) { echo '处理级别：2<br>'; return; } $top = new $this->_top; $top->deal($level); } } class level3 { protected $_level = 3; protected $_top = 'Level2'; public function deal($level) { echo '处理级别：3<br>'; return; } } if (!empty($_POST)) { echo '<h1>PHP设计模式</h1>'; //连接数据库——工厂+单例模式 $mysqlFactory = new MysqlFactory(); $single = $mysqlFactory->createDB(); $single->conn(); echo '<br>'; //观察者模式 $username = $_POST['username']; $ob = new Observer($username); $a = new StyleA(); $ob->attach($a); $b = new StyleB(); $ob->attach($b); $ob->show(); echo '<br>'; $ob->detach($b); $ob->show(); echo '<br>'; //桥接模式 $typeM = $_POST['typeM']; $typeN = 'Bridge' . $_POST['typeN']; $obj = new $typeN(new $typeM); $obj->show(); echo '<br>'; //适配器模式 $post = $_POST; $obj = new Serialize($post); echo $obj->show(); echo '<br>'; $json = new JsonAdapter($post); echo $json->show(); echo '<br>'; echo '<br>'; //装饰器模式 $content = $_POST['content']; $decorator = new Decorator(new Base($content)); echo $decorator->show(); echo '<br>'; //责任链模式 echo '<br>'; $level = $_POST['level']; $deal = new Level1(); $deal->deal(intval($level)); return; } require("0.html");
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