[rkorebrits]

I'm busy upgrading from 3.0.4 to 3.1.7 and having issues with session. I've tested this on PHP 7.0 and PHP 7.2
I've seen a few other issues here regarding session on PHP 7.x with late versions of CI, but not any with resolution it seems.
When I run this:

Code:

   $this->session->set_userdata('test', 'test');
   print ($this->session->userdata('test'));

it prints "test" just fine. Then when I remove the 

Code:

set_userdata

 and reload the page, it's empty.

Either sessions aren't being stored, or they are being cleared. What could this be?

[InsiteFX]

We need to know all the versions you are running and what type of sessions you are using
database, file etc;

[Narf]

I'd look at the configuration first ... It's either something on the cookie level like a domain mismatch, or a bad save_path.