I found this url:
http://www.iezzi.ch/phorum/index.phpAnd now I will try it out...
Phorum code
As of Phorum 3.3.2, users can use Phorum Code to spice up their posts.
Phorum Code is much like the standard way many message board systems mark up posts.
Examples:
http://phorum.org Creates an url that is linked.
phorum.org Links the text 'phorum.org' to
http://phorum.org.
email@address.com Creates a linked email address

Creates an image tag that will show that image.
Bold TextUnderlined TextItalicized Text Makes the text bold, underlined, or italicized.
Centered Text
Centers text.
Does this quote text?
This will indent the text inside the tags.
Tags can be combined:
Phorum will also automatically link urls that are inside <>.
http://phorum.org/