Used to change the appearance of the comment text when comment_text() is called from a theme.
comment_text_filter($content)
Will boldface the word "blog" wherever it appears in the comment text without changing the comment in the database:
add_filter('comment_text', array('foo_bar', 'comment_text_filter')); class foo_bar { function comment_text_filter($content) { return str_replace('blog', '<strong>blog</strong>', $content); } }
See comment_text().