The requested URL /01.php was not found on this server. 说是没有找到根目录下的01.php，可是我明明创建了还保存了的啊 可是怎么会这样 求大神帮忙解决一下

Question

The requested URL /01.php was not found on this server.   说是没有找到根目录下的01.php，可是我明明创建了还保存了的啊  可是就是在浏览器中打不开  怎么回事呢？？、   求大神帮忙解决一下