URL parameter to XML / RSS

[tatone]

Hi, I'm developing an RSS feed and I would like to have a dynamic url which gets one parameter from the url:

So if the url of the feed is: http://www.website.com/feedtitle.xml

If we add a parameter like this: http://www.website.com/feedtitle.xml?p=123456

The link of the items in the feed will get the parameter from the url
<link>http:www.whatever.com/page?p=123456</link>

So again if we type the url as: http://www.website.com/feedtitle.xml?p=000000

It will be: <link>http:www.whatever.com/page?p=000000</link>


How is that possible?

Thanks
Max