php中注册器模式类用法实例分析,注册器实例分析
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
<?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); } }
需要注册的类
test.class.php
<?php class Test { function hello() { echo "hello world"; return; } } ?>
测试 test.php
<?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(); ?>
希望本文所述对大家php程序设计有所帮助。

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