Warning: require_once(C:\xampp\htdocs/includes/defines.php): failed to open stream: No such file or directory in C:\xampp\htdocs\index.php on line 18

Fatal error: require_once(): Failed opening required 'C:\xampp\htdocs/includes/defines.php' (include_path='.;C:\xampp\php\PEAR') in C:\xampp\htdocs\index.php on line 18