PHP学习：PHP设计模式之简单投诉页面实例

PHP应用
<?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");

PHP应用
<!DOCTYPE html>
<!--
To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor.
-->
<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>