public function any($key, $default = NULL)
    {
        $item = $this->param($key, NULL);
        if ( $item ) {
            return $item;
        }
        $item = $this->post($key, NULL);
        if ( $item ) {
            return $item;
        }
        $item = $this->query($key, NULL);
        if ( $item ) {
            return $item;
        }

        return $default;
    }