http://blog.csdn.net/lanxe/article/details/7038950
修改Php.ini中的session保存路径
; where MODE is the octal representation of the mode. Note that this
; does not overwrite the process's umask.
; http://php.net/session.save-path
session.save_path = "H:\Workspace\PHP\datacenter\code\pa.valsun.cn\tmp"