using markdown in a forum?

[Allan Odgaard]

On 2 May 2010, at 14:01, Aristotle Pagaltzis wrote:


>> […] you want to filter out HTML tags […]

> […] And it’s not impossible to write a 100% solid filter if you use  

> a *white*list applied to a real HTML parser.


Not sure what you mean by “real HTML parser”.

One thing to watch out for is improper HTML when users type a literal  
‘<’. I had a lot of users lose part of their comments because  
everything after a standalone ‘<’ was incorrectly filtered.

This was with WordPress + PHPMarkdown (blog comments). What made it  
worse was that it was the filtered content which went into the  
database, so once filtered, the content was gone.