title: How can I expire a user's session in PHP?
body: <p>Some people say use <code>unset($_SESSION["..."])</code> and some say <code>session_unset()</code> and some say <code>$_SESSION = array()</code> and some say <code>session_destroy()</code> and I am saying "for God's sake, this stuff is getting confusing, can someone please explain me which is the correct/secure way to log the user out" and what is used for what?</p>
  
  <p>Appreciated...</p>