gistfile1.php

<?php echo '<?'; ?>xml version="1.0" encoding="UTF-8"?>
<rss xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" version="2.0">
<channel>

  <title>
    <?php echo ucwords(basename(dirname($_SERVER['SCRIPT_NAME']))); ?><?php if (!empty($_GET['match'])): ?> : <?php echo ucwords($_GET['match']); ?><?php endif; ?>
  </title>
  
  <?php $files = scandir('.'); ?>
  <?php $files = array_reverse($files); ?>
  
  <?php foreach ($files as $file): ?>
    <?php $pathinfo = pathinfo($file); ?>
    <?php if (!in_array($pathinfo['extension'], array('mp3', 'm4a'))) continue; ?>
    <?php
      if (!empty($_GET['match']))
        if (strpos(strtolower($file), strtolower($_GET['match'])) === false)
          continue;
    ?>
    
    <?php
      // delete files over 1 week old
      if (filemtime($file) < strtotime('now - 1 week'))
        unlink($file);
    ?>
    
    <?php $url = 'http://'.$_SERVER['SERVER_NAME'].dirname($_SERVER['SCRIPT_NAME']).'/'.rawurlencode($file); ?>
    
    <item>
      <title><?php echo $pathinfo['filename']; ?></title>
      <enclosure
        url="<?php echo $url; ?>"
        length="<?php echo filesize($file); ?>"
        <?php if ($pathinfo['extension'] == 'mp3'): ?>
          type="audio/mpeg"
        <?php elseif ($pathinfo['extension'] == 'm4a'): ?>
          type="audio/mp4"
        <?php endif; ?>
      />
      <guid><?php echo $url; ?></guid>
      <pubDate><?php echo date('r', filemtime($file)); ?></pubDate>
    </item>
  
  <?php endforeach; ?>

</channel>
</rss>