注册模式

 

<?php

class Registry
{
    private static $arr;

    public static function get($name)
    {
        return self::$arr[$name];
    }

    public static function set($name, $value)
    {
        self::$arr[$name] = $value;
    }

    // typically there would be methods to check if a key has already been registered and so on ...
}