static function &getInstance($key=null)
	{
		static $instances;

		if (!isset($instances))
		{
			$instances = array();
		}

		if (!isset($instances[$key]))
		{
			$instances[$key] = new static($key);
		}

		return $instances[$key];
	}
static function &getInstance($key=null)
	{
		static $instances;

		if (!isset($instances))
		{
			$instances = array();
		}

		if (!isset($instances[$key]))
		{
			$instances[$key] = new static($key);
		}

		return $instances[$key];
	}
static function & getInstance ( $ key = null ) { static $ instances ; if ( ! isset ( $ instances ) ) { $ instances = array ( ) ; } if ( ! isset ( $ instances [ $ key ] ) ) { $ instances [ $ key ] = new static ( $ key ) ; } return $ instances [ $ key ] ; }
Get Instance of Page Archive

@param   string  $key  Instance Key
@return  object
Get Instance of Page Archive