Session::get

static function get()
{
	if(!self::$set)
	{
		self::$TTL = CRestUtil::HANDLER_SESSION_TTL;
		self::$ttlDecreased = true;
	}
	else
	{
		if(!self::$ttlDecreased)
		{
			self::$TTL--;
			self::$ttlDecreased = true;
		}
	}

	return self::$TTL <= 0 ? false : self::$TTL;
}