title: codeigniter session object expired availability
body: <p>This might be a silly question. </p>
  
  <p>Once a user has been logged in, if session expires I want to redirect him to a "lockscreen" instead to a "login" page.</p>
  
  <p>I want to send to the lockscreen some session data (like img-src and loginname)</p>
  
  <p>So, here's the question. Does session object is automatically destroyed when expires or is it still available?</p>
  
  <p>Thanks.</p>