PHP独立Session数据库存储操作类分享(2)

if ($session AND ($this->fetch_substr_ip($session[‘ipaddress']) == $this->fetch_substr_ip($this->_session_host)))
                {
                        $gotsession = true;
                        $this->_vars = $session;
                        $this->_created = false;
                }
            }

if ($gotsession == false)
            {
                $this->_vars = $this->fetch_session();
                $this->_created = true;
                $gotsession = true;
            }

if ($this->_created == false)
            {
            $this->set(‘lastactivity', date(‘Y-m-d H:i:s', TIMENOW));
            $this->set(‘location', $_SERVER[‘REQUEST_URI']);
            }

}

/**
     * Builds an array that can be used to build a query to insert/update the session
     *
     * @return    array    Array of column name => prepared value
     */
    private function _build_query_array()
    {
        $return = array();
        foreach ($this->_db_fields AS $fieldname => $cleantype)
        {
            switch ($cleantype)
            {
                case self::TYPE_INT:
                    $cleaned = is_numeric($this->_vars["$fieldname"]) ? $this->_vars["$fieldname"] : intval($this->_vars["$fieldname"]);
                    break;
                case self::TYPE_STR:
                default:
                    $cleaned = "'" . addslashes($this->_vars["$fieldname"]) . "'";
            }
            $return["$fieldname"] = $cleaned;
        }

return $return;
    }