I guess you don't have to ask permission to do that, because it is simply a
link to a website and after all rss is to attract visitors ... right ? I am
talking about rss-feeds from slashdot, php, lockergnome, ...
Pugi!
It's simpler, really (in fact, RSS stands for "Really Simple
Syndication"). An RSS feed is an XML file that looks sort of like
this:
<?xml version="1.0"?>
<rdf:RDF
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns="http://my.netscape.com/rdf/simple/0.9/">
<channel>
<title>My RSS Feed</title>
<link>http://www.example.com/</link>
<description>My Very Cool Web Site</description>
</channel>
<image>
<title>My Logo</title>
<url>http://www.example.com/images/logo.jpg</url>
<link>http://www.example.com/</link>
</image>
<item>
<title>Most Recent Article</title>
<link>http://www.example.com/article.php?id=555</link>
</item>
<item>
<title>Second Most Recent Article</title>
<link>http://www.example.com/article.php?id=554</link>
</item>
<item>
<title>Third Most Recent Article</title>
<link>http://www.example.com/article.php?id=553</link>
</item>
[More <item> entities...]
</rdf:RDF>
You can have a static *.rss file or a PHP script that would generate
the feed on demand. In the latter case, you can do something like
this:
<?php
header('Content-Type: text/xml');
?><?xml version="1.0"?>
<rdf:RDF
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns="http://my.netscape.com/rdf/simple/0.9/">
<channel>
<title>My RSS Feed</title>
<link>http://www.example.com/</link>
<description>My Very Cool Web Site</description>
</channel>
<image>
<title>My Logo</title>
<url>http://www.example.com/images/logo.jpg</url>
<link>http://www.example.com/</link>
</image>
<?php
// Connect to DB server and select a database...
$query = 'SELECT id, title FROM articles ORDER BY id DESC LIMIT 10';
$result = mysql_query($query);
while ($record = mysql_fetch_array($result)) {
echo <<<EOR
<item>
<title>{$record['title']}</title>
<link>http://www.example.com/article.php?id={$record['id']}</link>
</item>
EOR;
}
?>
</rdf:RDF>
That's it, really... You also may want to think about sending out a
"Last-Modified:" header with the date/time matching that of the most
recent article; this may help you decrease server load through
caching...
Creating a static file is not much different. Just output the same
content (except HTTP headers, of course) into an *.rss file every time
you add an article to your site...
Cheers,
NC