为什么会显示说没有这个文件的？大家都是这样吗？

Warning: fopen(/webroot/resource/php/f.txt): failed to open stream: No such file or directory in /54/754/EwZb/index.php on line 3

Warning: fclose() expects parameter 1 to be resource, boolean given in /54/754/EwZb/index.php on line 12