How to 'If Author' Comments Check

Question

I would like to add extra markup to a comment made by the site admin/post author. Is there a check for this and how would I add it to my code below?

Basically, if the comment is from the post author I would like to add HTML next to their name (Author or Admin).

Thanks

            <div class="comment-meta commentmetadata ">         
                <?php printf(__('<cite class="fn">%s</cite> <span class="says">said on</span>'), get_comment_author_link()) ?>
                <a href="<?php echo htmlspecialchars( get_comment_link( $comment->comment_ID ) ) ?>">
                <?php
                    printf( __('%1$s at %2$s'), get_comment_date(),  get_comment_time()) ?></a><?php edit_comment_link(__('(Edit)'),'  ','' );
                ?>
        </div>

Answer 1

If you use the comment_class function to add classes to each comment, comments by the post's author can be styled via the bypostauthor class.

You can alternately match the comment ID against the post ID:

global $post;
if( $comment->user_id === $post->post_author ) {
    // is author comment
}

Answer 2

I have very simple solution to this. Just add this code to your theme’s comments.php file

<?php
if (1 == $comment->user_id)
  echo 'author';
?>