Let’s start by looking at the code to achieve styling of author comments prior to Wordpress 2.7. On kremalicious.com I’ve used this code:
So with some php stuff we were able to check for the author name or, as I did it, for the URL of the comment author. If one of these were detected Wordpress added a new class ‘author’ to the
<li> tag which we were able to style by adding a li.author to our css file:
But with Wordpress 2.7 these steps are needless because of the new function
<?php wp_list_comments(); ?> which adds a class on author comments for itself!
If a comment from the author of an article is posted under this article, Wordpress automatically adds the class 'bypostauthor’ to the surrounding
<li> tag. So all you have to do is adding a css style of
li.bypostauthor to your css file or just renaming your old
li.author class or whatever you used for this:
And that’s it for adding a different style to comments from the article author. Just add some css and there you go. Wonderful!
Wordpress also has a special class for registered users of your site so you’re able to style their comments as well. For this just use the class 'byuser’:
All the various classes Wordpress adds to comments are listed in the Codex page for enhanced comments display. And here’s a very nice grahical overview about everything Wordpress 2.7 adds to comments.