[PHP] Cannot write data in session file

[Bo Deng]

I just move the web pages from windows to linux. But the session
variable doesn't work. And I found that in the \tmp directoy, it has
sess_****(MD5) file,but with empty contents,just 0 byte.

BTW, I run a linux virtual host under IBM s390. the code works well in windows and 
other linux systems(not virtual host).
 
So how to fix it ?
 
Thank you!



                
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