Upgrading from 2 to 3 Form Issues

delete your system folder and copy the whole CodeIgniter 3 system folder over.

There was a big change in the sessions for version 3.

You may also need to update the application/config folder there were some changes
there also.

What did you Try? What did you Get? What did you Expect?

Joined CodeIgniter Community 2009.  ( Skype: insitfx )