见笑啦，给我介绍一下这串提示的意思，网站打开以后就出现。
Warning: include_once(./common.php) [function.include-once]: failed to open stream: No such file or directory in D:\wwwroot\index.php on line 7
Warning: include_once() [function.include]: Failed opening './common.php' for inclusion (include_path='.;C:\php5\pear') in D:\wwwroot\index.php on line 7
Fatal error: Call to undefined function sreadfile() in D:\wwwroot\index.php on line 44
我只是把站点从一个空间搬到一个vps上，只修改了配置文件，怎么就出现这种了，一般情况下应该怎么改呢
