title: HTML form doesn't upload mp3 files
body: <p>I've been having troubles trying to upload mp3 files with html and php. It works on every file format I try but mp3.</p>
  
  <pre><code>&lt;form action="output.php" method="post" enctype="multipart/form-data" id="uploads"&gt;
  &lt;p&gt;From computer&lt;br /&gt;
  &lt;input name="userfile" type="file" /&gt;&lt;/p&gt;
  &lt;p&gt;&lt;input type="submit" class="send" value="Convert file" name="submit" /&gt;&lt;/p&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>When I try to get information about the file with print_r($_FILES), output.php prints an empty array. How can this happen and is there any solution for this?</p>
  
  <p>Thanks in advance!</p>
  
  <p>Regards!</p>