Sample WP comment callback function

comment.php

<?php

function tsticka14_comment( $comment, $args, $depth ) {
	$GLOBALS['comment'] = $comment;
	// I kind of cheat here by not doing anything for pingbacks
	// and trackbacks, which means the amount of stuff that 
	// displays may differ from the comment count unless 
	// pingbacks and trackbacks are disabled in the admin.
	switch ( $comment->comment_type ) :
		case 'pingback' :
		case 'trackback' :
			break;
		default : 
			$is_post_author = ( $comment->comment_author_email == get_the_author_email() );
			$is_tyler = ( $is_post_author && $comment->comment_author_email == '[email protected]' );
?>
		
<article class="post post-comment" id="comment-<?php comment_ID(); ?>">
	<figure class="supporting">
		<?php echo get_avatar( $comment, 68, get_bloginfo( 'template_directory' ) . '/img/avatar-default.png' ); //68 ?>
	</figure>
	<div class="primary content">
		<header>
			<h4<?php if ( $is_tyler ) : ?> class="icon-pre icon-verified"<?php endif; ?>><?php comment_author_link(); ?> says</h4>
		</header>
		<?php //echo wptexturize( Markdown( get_comment_text() ) ); ?>
		<?php comment_text(); ?>
	</div>
	<footer class="primary meta note">
		<?php if ( $comment->comment_approved == '0' ) : ?>
		<p><span class="important"><strong>Thanks!</strong> Your response is awaiting moderation.</span></p>
		<?php else : ?>
		<p>Responded <time pubdate datetime="<?php comment_time('Y-m-d\TH:i'); ?>"><?php comment_time('F j, Y \a\t g:ia'); ?> <span class="human-time-diff">(<?php echo human_time_diff_years( get_comment_time('U'), current_time('timestamp') ); ?> ago)</span></time></p>
		<?php endif; ?>
	</footer>
</article>
			
		<?php break;
	endswitch;
}