How to detect if a page is an RSS or ATOM feed
- by Pepper
Hello,
I'm currently building a new online Feed Reader in PHP. One of the features i'm working on is feed auto-discovery. If a user enters a website URL, the script will detect that its not a feed and look for the real feed URL by parsing the HTML for the proper tag.
The problem is, the way im currently detecting if the URL is a feed or a website only works part of the time, and I know it can't be the best solution. Right now im taking the CURL response and running it through simplexml_load_string, if it can't parse it I treat it as a website. Here is the code.
$xml = @simplexml_load_string( $site_found['content'] );
if( !$xml ) // this is a website, not a feed
{
// handle website
}
else
{
// parse feed
}
Obviously, this isn't ideal. Also, when it runs into an HTML website that it can parse, it thinks its a feed.
Any suggestions on a good way of detecting the difference between a feed or non-feed in PHP?
Thanks,
Pepper
http://feedingo.com
