Warning: require_once(db.php): failed to open stream: No such file or directory in C:\inetpub\vhosts\default\htdocs\index.php on line 6

Fatal error: require_once(): Failed opening required 'db.php' (include_path='.;.\includes;.\pear') in C:\inetpub\vhosts\default\htdocs\index.php on line 6