Warning: Use of undefined constant MYMPS_ROOT - assumed 'MYMPS_ROOT' (this will throw an Error in a future version of PHP) in D:\wwwroot\yishui\index.php on line 15

Fatal error: Uncaught Error: Call to undefined function write_msg() in D:\wwwroot\yishui\index.php:15 Stack trace: #0 {main} thrown in D:\wwwroot\yishui\index.php on line 15