title: In CodeIgniter, where should I declare my global variables?
body: <p>I want to declare some global variables and global constants.  Normally, I would put them in the includes/global.php of my own custom framework.  </p>
  
  <p>Where should I define globals in CodeIgniter?  Here's an example of the globals I want to declare:</p>
  
  <pre><code>define('USERSTAT_OFFLINE', 0);
  define('USERSTAT_ONLINE', 1);
  define('USERSTAT_AWAY', 2);
  define('USERSTAT_BUSY', 3);
  
  $PAYMENT_PLANS = array();
  $PAYMENT_PLANS[] = array('id'=&gt;1, 'name'=&gt;'Trial');
  $PAYMENT_PLANS[] = array('id'=&gt;2, 'name'=&gt;'Premium Plan');
  </code></pre>