Notice: Undefined index: in C:\xampp\htdocs\tsc\index.php on line 16

Warning: require_once(C:\xampp\htdocs\tsc): failed to open stream: Permission denied in C:\xampp\htdocs\tsc\index.php on line 16

Fatal error: require_once(): Failed opening required '' (include_path='.;C:\xampp\php\PEAR') in C:\xampp\htdocs\tsc\index.php on line 16