BBCode + Plugin for RSS in Posts

[ThePimp]

I'm looking to setup a BBCode [rss]http://www.url-to-feed.com/rss.xml[/rss] and have the BBCode output the parsed feed via MagpieRSS (already setup on server).

I've written a function:
rss("http://www.rollingstone.com/rssxml/movie_reviews.xml", 20, "MOVIE REVIEWS");

Such as above, where the var fields are:
"URL TO FEED", "LIMIT RETURN", "FEED TITLE"

I'd like the BBCode to call this function and replace the "URL TO FEED" with the url given in the example in the first line of this message.
[rss]http://www.url-to-feed.com/rss.xml[/rss]

The plugin setup will require an include file hooked @ global_start:
ob_start();
include("magpierss/rss_parse.inc");
$news = ob_get_contents();
ob_end_clean();

This is about as far as I can get without some confusion. As far as I know, custom BBCode won't parse PHP (if I'm not mistaken). How do I get the rss() function to be called in the BBCode?

Thanks for your help in advance.

Anyone???

[ThePimp]

bump?

[ThePimp]

Does anyone answer questions here anymore?