Display.controller.php

<?php

// When was the last time this topic was replied to?  Should we warn them about it?
	$request = $smcFunc['db_query']('', '
		SELECT poster_time
		FROM {db_prefix}messages
		WHERE id_msg = {int:id_last_msg}
		LIMIT 1',
		array(
			'id_last_msg' => $topicinfo['id_last_msg'],
		)
	);

	list ($lastPostTime) = $smcFunc['db_fetch_row']($request);
	$smcFunc['db_free_result']($request);

	$context['oldTopicError'] = !empty($modSettings['oldTopicDays']) && $lastPostTime + $modSettings['oldTopicDays'] * 86400 < time() && empty($topicinfo['is_sticky']);