Questions about Drupal Anonymous Access session value cannot be saved

Today found a day did not find the relevant solution, the situation is: in Drupal without the global $user case, the use of $_session is equivalent to a common variable, there is no way to save, and in the case of global $user, if it is anonymous, That is, $user->uid is 0, the session is no way to save, there is no big God can come out pointing twos, younger brother is not very grateful! Thank you

Reply to discussion (solution)

What do you want to keep? How is the code written?

I had the same problem, but I solved it.
http://segmentfault.com/a/1190000002671161

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