New Year, new question ; ).

Currently in order to check if a given member is the author of the currently viewed topic, the condition is:

Is there a similar (hopefully simple) way to check if user posted (at least one message) in the currently viewed topic?

Thank you.

Should probably do some kind of array search. This is just an idea, not a working solution. Perhaps PHP function in_array could help:

// Somehow ID's of users who've posted in current topic should be fetched. (How? No idea.)
$message_ids = array();

// Then compare if there's one or more matches.
if (in_array($user_id,$message_ids)) { echo 'yes'; }

Thanks and yes, the idea is probably correct. The point is to compare the message IDs and if there's at least one found the result is TRUE.. I hope Paul will find some trick to do it ;).

Before the topic loads, there could be an extra request in bb_plugins.php which asks DB if such user ID is in the messages related to this topic. For example (I did not test it):

Then {$userPostedTxt} is for header template or other template.

It works perfectly. Thank you!