Usage example analysis of the registrar mode class in PHP, registrar example analysis_PHP tutorial

Register pattern class usage example analysis in php, Registrar instance analysis

The examples in this article describe the usage of the registrar pattern class in php. Share it with everyone for your reference, the details are as follows:

Registrar reading and writing class
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);
  }
}

Classes that need to be registered

test.class.php

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

Test 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;>

I hope this article will be helpful to everyone in php programming design.

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