title: how to pass a variable from one controller to the other in Code igniter
body: <p>I have just started learning Code Igniter  . </p>
  
  <p>I want to know how can I pass a variable from one controller(first_cont.php) to other controller (second_cont.php) ? </p>
  
  <p>Any help would be appreciated .</p>
  
  <p>Thanks in Advance :) </p>