Warning: require_once(DB.php): failed to open stream: No such file or directory in /var/www/html/tmis/rss_feed.php on line 15

Fatal error: require_once(): Failed opening required 'DB.php' (include_path='.:/usr/share/pear:/usr/share/php') in /var/www/html/tmis/rss_feed.php on line 15