WordPress hack: Canonical links for comments

WordPress hack: Canonical links for comments

Duplicate content is one of the most discussed topics in terms of SEO. Happilly, with the new rel=’canonical’ attribute, you can now reduce risks of duplicate content. Here is how to implement it for your comments pages, on your WordPress blog.

Simply paste the following code on your function.php file:

function canonical_for_comments() {
 global $cpage, $post;
 if ( $cpage > 1 ) :
  echo "\n";
  echo "<link rel='canonical' href='";
  echo get_permalink( $post->ID );
  echo "' />\n";
 endif;
}
add_action( 'wp_head', 'canonical_for_comments' );

Thanks to I like WordPress for the useful tip!

21 Responses

Elizabeth K. Barone

Aug 05 2009 18:23

I didn’t know what rel=canonical was, so I had to look it up. Here’s a great — and witty — quickie explanation by Conversation Marketing: http://www.conversationmarketing.com/2009/02/3-reasons-to-use-rel-canonical.htm

YAIR

Aug 10 2009 01:48

Hi,
I landed in your blog while searching for “Canonical tag”.
I used it in my websites but had no idea how to imlement it in WP.
Finally I got the function. Thanks a lot.