Warning: include(classes/db.class.php): failed to open stream: No such file or directory in /opt/lampp/htdocs/classes/lms_login.php on line 2

Warning: include(): Failed opening 'classes/db.class.php' for inclusion (include_path='.:/opt/lampp/lib/php') in /opt/lampp/htdocs/classes/lms_login.php on line 2

Notice: Undefined index: key in /opt/lampp/htdocs/classes/lms_login.php on line 3

Fatal error: Uncaught Error: Class 'DB' not found in /opt/lampp/htdocs/classes/lms_login.php:4 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/classes/lms_login.php on line 4