gistfile1.txt

<?php

class Registry {

    /**
     * @var array The store for all objects
     */
    static private $store = array();

    /**
     * Add an object to the registry
     *
     * If you do not specify a name the class name is used
     *
     * @param mixed $object The object to store
     * @param string $name Name used to retrieve the object
     * @return mixed If overwriting an object, old one is returned
     * @throws Exception
     */
    static public function add($object, $name = null)
    {
        //Use the class name if not given, simulates singleton
        $name = (!is_null($name)) ? $name : get_class($object);
        //$name = strtolower($name);

        $return = null;
        if(isset(self::$store[$name]))
        {
            $return = self::$store[$name];
        }

        self::$store[$name] = $object;
        return $return;
    }

    /**
     * Get an object from the registry
     *
     * @param string $name Object name, {@see self::set()}
     * @return mixed
     * @throws Exception
     */
    static public function get($name)
    {
        if(!self::contains($name))
        {
            throw new Exception("Object does not exist in registry");
        }
        return self::$store[$name];
    }

    /**
     * Check if an object is in the registry
     *
     * @param string $name Object name, {@see self::set()}
     * @return bool
     */
    static public function contains($name)
    {
        if(!isset(self::$store[$name]))
        {
            return false;
        }

        return true;
    }

    /**
     * Remove an object from the registry
     *
     * @param string $name Object name, {@see self::set()}
     * @returns void
     */
    static public function remove($name)
    {
        if(self::contains($name))
        {
            unset(self::$store[$name]);
        }
    }
}