wp v5.0.1
bbpress v2.5.14

How can I hook into the FIRST reply on a single topic page? I want to add an image attachment only to the first reply, but i cannot find how to do so. I hooked into the action “bbp_theme_before_reply_content“, but it adds the image to every reply on the page!

I thought about getting a list of all reply ids, then comparing the current reply id (bbp_get_reply_id()) with the first id in the array, and showing content if they are equal. That would solve the problem. BUT I also failed at getting the list of ids – I tried with bbp_get_all_child_ids

I also wish the FIRST reply in the loop would have a unique id or class, but it does not 🙁

Here is the page:

Meet My New Crested Gecko

[@robin-w Moderator 6 years, 10 months ago]

ok, get the topic ID, and then in your hook to bbp_theme_before_reply_content look up whether the topic has had any replies by using

$count = get_post_meta ($topic_id, '_bbp_reply_count' , false)

If $count=0, then there have been no replies, so this is the first.

[@mattbru Participant 6 years, 10 months ago]

Thank you Robin W. But that does not work.

$count = get_post_meta($topic_id, '_bbp_reply_count', false);
is the same as
$count = bbp_get_topic_reply_count($topic_id);
Except the second one returns a number, first one gives you an array.
The results of what you suggested gives me array([0]=>6) , meaning there are six replies to the topic.

If you do a conditional like this: if ($count === 0) { // then code } , its only going to run the code if there are no replies to the post. That’s not what I need.

[@mattbru Participant 6 years, 10 months ago]

Okay, I GOT IT!
The key is to compare the topic id and the reply id. If they are equal, then its the first reply in bbpress.

Here is my full solution:

<?php
function add_content_before_first_reply_content($content,$id){

	$post = get_post($id);
	$topic_id = bbp_get_topic_id();
	$reply_id = bbp_get_reply_id();
	$content_to_add = '';

	if ($topic_id === $reply_id) {
		// do whatever you need to in  here
		$content .= $content_to_add;
	}

	return $content;

}
add_filter( 'bbp_get_reply_content', 'add_content_before_first_reply_content', 99, 2 );

[@robin-w Moderator 6 years, 10 months ago]

great – glad you are fixed, and thanks for posting the solution