Attached below list of BBCs in use (see image)
I've just noticed also that the forum software will allow certain html elements if I wish, but it parses them as php BBC.
Although I don't currently have this option turned on ... for security reasons the only html elements that SMF will parse are...
<b>, <u>, <i>, <s>, <em>, <ins>, <del>
<a href="">
<img src="" alt="" />
<br />, <hr />
<pre>, <blockquote>
anything else it will ignore.