关于PHP的SESSION的问题

[mydreamer]

Warning: session_start(): open(/tmp\sess_f661d80b8efe31b4b71a42b33c288de2, O_RDWR) failed: No such file or directory (2) in D:\web\Super\index.php on line 2

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at D:\web\Super\index.php:2) in D:\web\Super\index.php on line 2

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at D:\web\Super\index.php:2) in D:\web\Super\index.php on line 2

Warning: Cannot modify header information - headers already sent by (output started at D:\web\Super\index.php:2) in D:\web\Super\index.php on line 22
我的PHP提示这样的错误
我的SESSION存在
session.save_path = C:\tmp
里面也有文件，只是都是0字节。

有谁知道怎么解决吗？？？

[bflovesnow]

这问题自从PHP4开始以来就被问
问得都要吐血了。。。

拜托查查旧贴好不好？

[feel8]

session_start()之前不能有输出。放到程序最开头。