Get Posts Link With Each Other

Question

Built into WordPress are categories, tags, and trackbacks/pingbacks that can serve as crosslinking. Your theme has to display the category an tag listings, which most seem to do. Trackbacks/pingbacks are displayed as part of the comment thread. Anything else, or anything more complicated, you will have to do yourself.

Based on your question, I am guessing that the trackbacks/pingbacks is where you want to start. That being the case, you will want to parse the $comments variable before you display the comments.

  foreach ($comments as $c) {
    if (!empty($c->comment_type) || 'pingback' == $c->comment_type || 'trackback' == $c->comment_type) {
      $related[] = $c;
    }
  }
  var_dump($related);

You can do a similar thing using the comments_array filter.

function break_comments($comments) {
  global $pingtracks;
  $coms = $pingbacks = array();
  foreach ($comments as $c) {
    if ('comments' == $c->comment_type) {
      $coms[] = $c;
    } else {
      $pingtracks[] = $c;
    }
  }
  return $coms;
}
add_action('comments_array','break_comments');

You can then access your pingback with …

global $pingtracks;
var_dump($pingtracks);

… in your template files. I honestly don’t see the advantage of that second technique though.

Both techniques will have trouble if comments are paginated. I am pretty sure they will, at least. And there is no way that I can see to avoid that. The comments query is pretty much hard-coded into the comments_template function and there are no useful filters in there. Presumably, this will eventually be rewritten to use WP_Comment_Query.

Again, if you need something more complicated, or different, you will have to write it yourself (or find a plugin). And if that is not what you are looking for please [edit] your question with more details.

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