title: HTML5 audio element with dynamic source
body: <p>I have a basic audio player:</p>
  
  <pre><code>&lt;audio controls="controls" autoplay="true" loop="loop"&gt;
  &lt;source src="song.php" type="audio/mpeg" /&gt;
  &lt;/audio&gt;
  </code></pre>
  
  <p>And instead of the source pointing directly to the MP3 file I have it pointed at a PHP file which then points to the MP3 file, which works. But, when the current track is over the PHP file is pointing to a new MP3 file. So, the problem that I have is that when the player goes to loop, with the new MP3 file, it completely stops working. Is there any way around this? Is there a way to do this with a playlist or any other players?</p>