CSecuritySessionMC::close

static function close()
{
	if(!self::isConnected() || !self::isValidId(self::$sessionId))
		return false;

	if (!self::$isReadOnly && self::$isSessionReady)
	{
		if(isSessionExpired())
			self::destroy(self::$sessionId);

		self::$connection->replace(self::getPrefix().self::$sessionId.".lock", 0, 0, 1);
	}

	self::$sessionId = null;
	self::closeConnection();
	return true;
}