Warning: require_once(./check.php): failed to open stream: No such file or directory in C:\xampp\htdocs\tong\888xitong\index.php on line 3

Fatal error: require_once(): Failed opening required './check.php' (include_path='C:\xampp\php\PEAR') in C:\xampp\htdocs\tong\888xitong\index.php on line 3