PHP and XML: Dlvr.it does not work - php

Question

My feeds are made with PHP and MYSQL into XML and then feedburner.
My problem is that dlvr.it cannot read new entries everytime I post.
Here's my PHP code:
<?php
include('db.php');
header('Content-Type: text/xml');
echo '<?xml version="1.0" encoding="ISO-8859-1"?>
<rss version="2.0">
<channel>
<title>MindWeather Thesis</title>
<description>Latest News from my website</description>
<link>http://www.mindweather.info</link>';
$get_articles = "SELECT Fore_ID, Valid, Synopsis,
DATE_FORMAT(Issued,'%a, %e %b %Y %T') as formatted_date
FROM tblforecast ORDER BY Issued DESC LIMIT 15";
$articles = mysql_query($get_articles) or die(mysql_error());
while ($article = mysql_fetch_array($articles)){
echo '
<item>
<title>'.$article['Valid'].'-hour Forecast</title>
<description><![CDATA['.$article['Synopsis'].']]> </description>
<link>http://mindweather.info/fforecast.php?fore='.$article['Fore_ID'].'</link>
<pubDate>'.$article['formatted_date'].' GMT</pubDate>
</item>';
}
echo '</channel>
</rss>';
?>
The feedburner feed is located at: http://www.mindweather.info/feedz2.php
Your answers would be as of much help. Thanks!

Answer 1

The mechanism to detect new entries in a feed is to identify them using their unique <guid>. Since your feed lacks that element, it's perfectly normal that this service cannot detect new entries.
It's as simple has addding something like : <guid><?php echo $article['Fore_ID']; ?></guid>, assuming of course that the Fore_ID is unique. Add them between the <item> and </item>
You should also make sure each <link> element is unique because this is another way feed readers try to detect new/unique entries when they fail to do so using that <guid> element.