Warning: require(./ThinkPHP/ThinkPHP.php): failed to open stream: No such file or directory in D:\wwwroot\jxfangda\wwwroot\index.php on line 19

Fatal error: require(): Failed opening required './ThinkPHP/ThinkPHP.php' (include_path='.;C:\php\pear') in D:\wwwroot\jxfangda\wwwroot\index.php on line 19