<?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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<html><head><title>PHP设计模式</title><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><style>div{border:solid gray 1px;margin-top:10px;height: 100px;width: 200px;}</style></head><body><form action="0.php" method="post"><h1>用户名</h1><select id="username" name="username"><option value="Tom">Tom</option><option value="Lily">Lily</option></select><h1>投诉方式</h1><select id="type" name="typeM"><option value="Normal">Normal</option><option value="Danger">Danger</option></select><select id="type" name="typeN"><option value="Email">Email</option><option value="Sms">Sms</option></select><h1>处理级别</h1><select id="level" name="level"><option value="1">1</option><option value="2">2</option><option value="3">3</option></select><h1>投诉内容</h1><textarea id="content" name="content" rows="3"></textarea><button type="submit">提交</button></form></body>
</html>