protected static function _defaults($params)
	{
		$defaults = array(
			'check'   => null,
			'regex'   => null,
			'country' => null,
			'deep'    => false,
			'type'    => null
		);
		$params = array_merge($defaults, $params);
		if ($params['country'] !== null)
		{
			$params['country'] = mb_strtolower($params['country']);
		}
		return $params;
	}