Create an RSS Feed of Files in a Directory

I record some radio broadcasts for offline/on-demand listening. Coupled with an RSS feed, I can get these downloaded to my podcast player of choice. Below is an example of such a feed that I put together last night.

<?php

$files = glob("/path/to/directory/*");
$files = array_combine($files, array_map("filemtime", $files));

arsort($files);

$files = array_keys($files);

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>Title of Your Feed</title>
    <description>Description of Your Feed</description>
    <link>A homepage for your feed</link>
    <language>en-us</language>
    <itunes:image href="http://path/to/feed/icon.jpg"/>
';

foreach ( $files as $file) {
  // the filenames that I'm working with include the date in them
  // with a little slicing and dicing of the names, I can get what I need for the date variable
  // there are likely better ways of doing this, but this seemed the mostly reliable route to take in my case
  $date = preg_replace('/regex.of.junk/', '', $file);
  $date = preg_replace('/regex.of.more.junk/', '', $date);
  $date = date('D, j M Y H:i:s', strtotime($date));

  // remove the directory structure from the filename
  // again, there are likely better ways of doing this, but I was on a preg_replace roll
  $file = preg_replace('/.*Filename/', 'Filename', $file);

  echo "
    <item>
      <title>Title " . $date . "</title>
      <link>Link</link>
      <guid>" . $file . "</guid>
      <pubDate>" . $date . "</pubDate>
      <enclosure url='http://download/link/path/" . $file . "' type='audio/mpeg'/>
    </item>
  ";

  // let's stop after creating an RSS item for 10 files
  if (++$i == 9) break;
}

echo "
  </channel>

</rss>
";

?>

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