How to Create user-defined RSS feeds in WordPress

If you need a custom RSS feed, like for example, a feed indexing only somes categories + tags, or if you redirected all WordPress RSS feeds to Feedburner but still want to be able to get a category feed, the solution is to use a page template.

Create a new file and simply paste the following code in this file. After pasting save it with the name “my-custom-feed.php” and save it in your theme directory.

Once done, simply write a new page and select “Custom Feed” as a page template. (Don’t type any text into this page.)

[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>Yoast E-mail Update</title>
<link>http://yoast.com/</link>
<description>The latest blog posts from Yoast.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[‘.yoast_rss_text_limit($post->post_content, 500).'<br/><br/>Keep on reading: <a href="’.get_permalink($post->ID).’">’.get_the_title($post->ID).'</a>’.’]]>’; ?></description>

<pubDate><?php yoast_rss_date( strtotime($post->post_date_gmt) ); ?></pubDate>
<guid><?php echo get_permalink($post->ID); ?></guid>
</item>
<?php } ?>

</channel>
</rss>

[/php]