title: How should I create my GUID?
body: <p>I'm going to be uploading images to a system and need them to be referenced by a non-sequential unique ID. I've read a little about GUIDs, and I'm wondering what the best approach to making one in PHP is. Should I md5() the current timestamp and salt it, or will PHP's uniqueid (<a href="http://www.php.net/manual/en/function.uniqid.php" rel="nofollow noreferrer">http://www.php.net/manual/en/function.uniqid.php</a>) function be sufficient enough?</p>
  
  <p>Thanks!</p>