Home > Backend Development > PHP Tutorial > php中注册器模式类用法实例分析_PHP

php中注册器模式类用法实例分析_PHP

WBOY
Release: 2016-05-29 11:48:07
Original
733 people have browsed it

本文实例讲述了php中注册器模式类用法。分享给大家供大家参考,具体如下:

注册器读写类
Registry.class.php

<&#63;php
/** 
 * 注册器读写类 
 */
class Registry extends ArrayObject
{
  /** 
   * Registry实例
   *
   * @var object 
   */
  private static $_instance = null;
  /**
   * 取得Registry实例
   * 
   * @note 单件模式
   * 
   * @return object
   */
  public static function getInstance()
  {
    if (self::$_instance === null) {
      self::$_instance = new self();
      echo "new register object!";
    }
    return self::$_instance;
  }
  /**
   * 保存一项内容到注册表中
   * 
   * @param string $name 索引
   * @param mixed $value 数据
   * 
   * @return void
   */
  public static function set($name, $value)
  {
    self::getInstance()->offsetSet($name, $value);
  }
  /**
   * 取得注册表中某项内容的值
   * 
   * @param string $name 索引
   * 
   * @return mixed
   */
  public static function get($name)
  {
    $instance = self::getInstance();
    if (!$instance->offsetExists($name)) {
      return null;
    }
    return $instance->offsetGet($name);
  }
  /**
   * 检查一个索引是否存在 
   * 
   * @param string $name 索引
   * 
   * @return boolean
   */
  public static function isRegistered($name)
  {
    return self::getInstance()->offsetExists($name);
  }
  /**
   * 删除注册表中的指定项
   * 
   * @param string $name 索引
   * 
   * @return void
   */
  public static function remove($name)
  {
    self::getInstance()->offsetUnset($name);
  }
}

Copy after login

需要注册的类

test.class.php

<&#63;php
class Test
{
   function hello()
   {
    echo "hello world";
    return;
   }
} 
&#63;>

Copy after login

测试 test.php

<&#63;php
//引入相关类
require_once "Registry.class.php";
require_once "test.class.php";
//new a object
$test=new Test();
//$test->hello();
//注册对象
Registry::set('testclass',$test);
//取出对象
$t = Registry::get('testclass');
//调用对象方法
$t->hello();
&#63;>
Copy after login

希望本文所述对大家php程序设计有所帮助。

Related labels:
php
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template