PHP设计模式之简单投诉页面实例_php技巧

php代码：

<?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
';
  }

  final protected function __clone() {
    return false;
  }

  public function conn() {
    echo 'Mysql连接成功
';
  }

}

/**
 * 工厂模式
 */
interface Factory {

  function createDB();
}

class MysqlFactory implements Factory {

  public function createDB() {
    echo 'Mysql工厂创建成功
';
    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
';
  }

}

class StyleB implements SplObserver {

  public function update(SplSubject $subject) {
    echo $subject->_style . ' 模块B
';
  }

}

/**
 * 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
';
  }

}

class Danger {

  public function msg() {
    echo 'Danger
';
  }

}

/**
 * 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：
' . $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：
' . $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
';
      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
';
      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
';
    return;
  }

}

if (!empty($_POST)) {
  echo '
PHP设计模式
';
  //连接数据库——工厂+单例模式
  $mysqlFactory = new MysqlFactory();
  $single = $mysqlFactory->createDB();
  $single->conn();
  echo '
';
  //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 '
';
  $ob->detach($b);
  $ob->show();
  echo '
';
  //桥接模式
  $typeM = $_POST['typeM'];
  $typeN = 'Bridge' . $_POST['typeN'];
  $obj = new $typeN(new $typeM);
  $obj->show();
  echo '
';
  //适配器模式
  $post = $_POST;
  $obj = new Serialize($post);
  echo $obj->show();
  echo '
';
  $json = new JsonAdapter($post);
  echo $json->show();
  echo '
';
  echo '
';
  //装饰器模式
  $content = $_POST['content'];
  $decorator = new Decorator(new Base($content));
  echo $decorator->show();
  echo '
';
  //责任链模式
  echo '
';
  $level = $_POST['level'];
  $deal = new Level1();
  $deal->deal(intval($level));
  return;
}
require("0.html");

html代码：

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