I want to implement a commenting system for my website. I looked around and found CKEditor to be the best WYSIWYG editor I found. I tried its bbcode output and it works perfectly. However if I use bbcode output, when I want to show the comments to the users, I should use a reliable parser to parse the bbcode to HTML. If I use HTML output, I may need to use something to prevent XSS in the comments. Which way you suggest for a simple commenting system. I already integrated CKEditor to my system and prefer a very lightweight and simple approach without so much bloat (like PEAR). Also, StackOverflow seems pretty awesome. Is it possible to use something similar for my php?
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PHP has a pecl BBCode extension.
SO uses Markdown. Markdown parser in PHP is also available