FluxBB supports syndication of forums and topics in the RSS 2.0 and Atom 1.0 formats as well as a simple, barebones XML format. Additionally, FluxBB can generate (X)HTML markup for display on pages outside the forum install (for example, on a website front page). The syndication features are supported via the extern.php script. The script can be called directly via an URL or from a PHP include command or through the use of Server Side Includes (SSI).
The scripts behaviour is controlled via the following GET parameters:
http://example.com/forums/extern.php?action=feed&type=rss
http://example.com/forums/extern.php?action=feed&type=atom&fid=5,6,7
http://example.com/forums/extern.php?action=feed&type=rss&nfid=12
http://example.com/forums/extern.php?action=online
http://example.com/forums/extern.php?action=online_full