Warning: include(connection.php): failed to open stream: No such file or directory in /opt/lampp/htdocs/portal/login/do_login.php on line 4

Warning: include(): Failed opening 'connection.php' for inclusion (include_path='.:/opt/lampp/lib/php') in /opt/lampp/htdocs/portal/login/do_login.php on line 4

Notice: Undefined index: user_name in /opt/lampp/htdocs/portal/login/do_login.php on line 7

Notice: Undefined index: pass in /opt/lampp/htdocs/portal/login/do_login.php on line 8

Fatal error: Uncaught Error: Call to undefined function mysql_query() in /opt/lampp/htdocs/portal/login/do_login.php:12 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/portal/login/do_login.php on line 12