title: What is the difference between session_create_id and session_regenerate_id()?
body: <p>Doc says</p>
  
  <p><code>session_create_id()</code> is used to create new session id for the current session.
  <code>session_regenerate_id()</code> Update the current session id with a newly generated one.</p>
  
  <p>Is there any difference between these two functions ?</p>