title: How I can set a session in codeigniter 3 database?
body: <p>I'm using the new version(3.0.0). of CodeIgniter and I have a new problem,  my sessions doesn't work. I mean, the code in the controller is correct because there are not errors but, when I try to print a PHP variable in a view there is nothing.</p>
  
  <p>I checked my table in the MySQL Server, and nothing, I don't now what is the problem. I put my code of config.php. (I don't understand a lot of things in this new version)</p>
  
  <pre><code>$config['sess_table_name']              = 'ci_sessions';
  $config['sess_driver']              = 'database';
  $config['sess_cookie_name']             = 'ci_session';
  $config['sess_expiration']          = 7200;
  $config['sess_save_path']               = NULL;
  $config['sess_match_ip']                = FALSE;
  $config['sess_time_to_update']      = 300;
  $config['sess_regenerate_destroy']  = FALSE;
  </code></pre>
  
  <p>I have to add the first line to "make" sessions works,  I don't know if that configuration is correct to make sessions in a database.</p>
  
  <p>If somebody has the same problem, help me please :( . My Session class has not been edited.</p>