custom-feed.php

<?php
/*
Template Name: Custom Feed
*/

$numposts = 5;

function yoast_rss_date( $timestamp = null ) {
  $timestamp = ($timestamp==null) ? time() : $timestamp;
  echo date(DATE_RSS, $timestamp);
}
/*
function yoast_rss_text_limit($string, $length, $replacer = '...') {
  $string = strip_tags($string);
  if(strlen($string) > $length)
    return (preg_match('/^(.*)\W.*$/', substr($string, 0, $length+1), $matches) ? $matches[1] : substr($string, 0, $length)) . $replacer;
  return $string;
}
*/
$posts = query_posts('showposts='.$numposts);

$lastpost = $numposts - 1;

header("Content-Type: application/rss+xml; charset=UTF-8");
echo '<?xml version="1.0"?>';
?><rss version="2.0">
<channel>
  <title>Flashfictionmagazine</title>
  <link>https://flashfictionmagazine.com/</link>
  <description>The latest blog posts from Flashfictionmagazine.com</description>
  <language>en-us</language>
  <pubDate><?php yoast_rss_date( strtotime($ps[$lastpost]->post_date_gmt) ); ?></pubDate>
  <lastBuildDate><?php yoast_rss_date( strtotime($ps[$lastpost]->post_date_gmt) ); ?></lastBuildDate>
  <managingEditor>[email protected]</managingEditor>
<?php foreach ($posts as $post) {
?>
  <item>
    <title><?php echo get_the_title($post->ID); ?></title>
    <link><?php echo get_permalink($post->ID); ?></link>
<description><?php echo '<![CDATA['.'<p><span>by </span><strong>'.get_post_meta($post->ID,'pen_name',true).'</strong></p>'.the_excerpt_rss().'<br/><a href="'.get_permalink($post->ID).'">Read the rest</a>'.']]>';  ?></description>
    <guid><?php echo get_permalink($post->ID); ?></guid>
  </item>
<?php } ?>
</channel>
</rss>