public function __set($nm, $val)
    {
        $strSer = serialize($val);
        $rows = 0;
        $sql = "SELECT COUNT(*) AS r FROM session_variable WHERE session_id = " . $this->native_session_id . " AND variable_name = '" . $nm . "'";
        if($stmt = $this->fconn->prepare($sql))
        {
            $stmt->execute();
            $stmt->bind_result($r);
            $stmt->fetch();
            $rows = $r;
            $stmt->free_result();
            $stmt->close();
        }
        if($rows > 0)
        {
            $sql = "UPDATE session_variable SET variable_value = '" . $strSer . "' WHERE session_id = " . $this->native_session_id . " AND variable_name = '" . $nm . "'";
            if($stmt = $this->fconn->prepare($sql))
            {
                $stmt->execute();
                $stmt->close();
            }
        }
        else
        {
            $sql = "INSERT INTO session_variable (session_id, variable_name, variable_value) VALUES (" . $this->native_session_id . ",'" . $nm . "','" . $strSer . "')";
            if($stmt = $this->fconn->prepare($sql))
            {
                $stmt->execute();
                $stmt->close();
            }
        }
    }

    public function __construct()
    {
        # Connect to database
        parent::__construct();
        # Set up the handler
        session_set_save_handler(
            array(&$this, '_session_open_method'),
            array(&$this, '_session_close_method'),
            array(&$this, '_session_read_method'),
            array(&$this, '_session_write_method'),
            array(&$this, '_session_destroy_method'),
            array(&$this, '_session_gc_method')
        );
        # Check the cookie passed - if one is - if it looks wrong we'll scrub it right away
        $strUserAgent = $_SERVER["HTTP_USER_AGENT"];
        $strUserIP = $_SERVER["REMOTE_ADDR"];
        if (isset($_COOKIE["PHPSESSID"]))
        {
            # Security and age check
            $this->php_session_id = $_COOKIE["PHPSESSID"];
            $sql = "SELECT id FROM user_session WHERE ascii_session_id = '" . $this->php_session_id . "' AND DATE_SUB(NOW(), INTERVAL " . $this->session_lifespan . " SECOND) < created AND user_agent = '" . $strUserAgent . "' AND user_ip = '" . $strUserIP . "' AND DATE_SUB(now(), INTERVAL " . $this->session_timeout . " SECOND) <= last_impression OR last_impression IS NULL";
            $rows = 0;
            if($stmt = $this->fconn->prepare($sql))
            {
                $stmt->execute();
                $stmt->bind_result($id);
                while($stmt->fetch())
                {
                    $this->native_session_id = $id;
                    $rows++;
                }
                $stmt->free_result();
                $stmt->close();
            }
            if($rows == 0)
            {
                # Set failed flag
                $failed = 1;
                # Delete from database - we do garbage cleanup at the same time
                $sql = "DELETE FROM user_session WHERE (ascii_session_id = '" . $this->php_session_id . "') OR DATE_SUB(now(), INTERVAL " . $this->session_lifespan . " SECOND) > created";
                if($stmt_user = $this->fconn->prepare($sql))
                {
                    $stmt_user->execute();
                    $stmt_user->close();
                }
                # Clean up stray session variables
                $sql = "DELETE FROM session_variable WHERE session_id NOT IN (SELECT id FROM user_session)";
                if($stmt_vars = $this->fconn->prepare($sql))
                {
                    $stmt_vars->execute();
                    $stmt_vars->close();
                }
                # Get rid of this one... this will force PHP to give us another
                unset($_COOKIE["PHPSESSID"]);
            }
        }
        else
        {
            # Delete from database - we do garbage cleanup at the same time
            $sql = "DELETE FROM user_session WHERE DATE_SUB(now(), INTERVAL " . $this->session_lifespan . " SECOND) > created";
            if($stmt_user = $this->fconn->prepare($sql))
            {
                $stmt_user->execute();
                $stmt_user->close();
            }
            # Clean up stray session variables
            $sql = "DELETE FROM session_variable WHERE session_id NOT IN (SELECT id FROM user_session)";
            if($stmt_vars = $this->fconn->prepare($sql))
            {
                $stmt_vars->execute();
                $stmt_vars->close();
            }
        }
        # Set the life time for the cookie
        session_set_cookie_params($this->session_lifespan);
        # Call the session_start method to get things started
        session_start();
          session_cache_limiter("no-cache, must-revalidate");
    }