title: Array & Session - Different between 'var' and $var
body: <p>I'm trying to understand PHP array right now. What's the different between</p>
  
  <p>$_SESSION['var'] and $_SESSION[$var]?</p>
  
  <p>And how and when can we access variable like this - $_SESSION[$var][1]?</p>
  
  <p>Thanks! :D</p>