Discover RSS feed from an URL?

[AudiS2]

Hi guys I searched for this.

 

 

How to write a function that would return the RSS feed url (or list of URLs) for the given site ? I guess this comes down to loading the page and parsing it for 'link' tags with rel='alternate' attribute?

 

For example feeds for phpfreaks.comare hidden in here.

<link href="http://feeds.feedburner.com/phpfreaks" rel="alternate" type="application/atom+xml" title="Latest Content" />
<link href="http://feeds.feedburner.com/phpfreaks/tutorials" rel="alternate" type="application/atom+xml" title="Latest Tutorials" />
<link href="http://feeds.feedburner.com/phpfreaks/blog" rel="alternate" type="application/atom+xml" title="Latest Blog Posts" /><meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

 

Can someone provide me with the code?

 

 

[vicodin]

This isn't the right place if your looking for someone to write it for you. Try it on your own and if your having an issue we can then help you find your issue.

[blueman378]

acctually youd be better off searching for the application/atom+xml meta type, but yes you are on the right track:

 

@s vicodin said we wont right it for you. but remember alot of servers wont allow you to include external pages.

[Mchl]

Try looking at cUrl extension.

[AudiS2]

OK lets start

 

preg_match('/\<link rel="alternate" type="application\/rss\+xml" title="(.*?)" href="(.*?)"/', $html, $matches);

 

should fill the title and the link, but what if tags are in different order?

[AudiS2]

Anyone?

[premiso]

My ways are not the best, but they work and since I hate regex this is how I would do it.

 

<?php

function grabRSSFeeds($website) {
    $file = file($website);

    foreach ($file as $line) {
        $line = strtolower($line);
        if (stristr($line, "link") !== false) {
             if (stristr($line, "application/rss+xml") !== false) {
				$line = str_replace("\"", "", $line);
				$line = str_replace("'", "", $line);
                    $splitIt = split("href=", $line);
				$linked = split(" ", $splitIt[1]); // split at first space
				$links[] = $linked[0];
             }
        }elseif (stristr($line, "<body")) {
            break; //kill the foreach if we reached the body tag.
        }
    }
   
    return $links;
}

echo '<pre>';
print_r(grabRSSFeeds('http://www.9news.com')); // should return an array of the links
echo '</pre>'
?>

 

Untested but should work.

 

EDIT: Added a ' and space check that "should" cover about any type of setup you would find.