FIND
// Fetch some info about the topic
if (!$pun_user['is_guest'])
$result = $db->query('SELECT pf.forum_name AS parent_forum, f.parent_forum_id, t.subject, t.closed, t.num_replies, t.sticky, f.id AS forum_id, f.forum_name, f.moderators, fp.post_replies, s.user_id AS is_subscribed FROM '.$db->prefix.'topics AS t INNER JOIN '.$db->prefix.'forums AS f ON f.id=t.forum_id LEFT JOIN '.$db->prefix.'subscriptions AS s ON (t.id=s.topic_id AND s.user_id='.$pun_user['id'].') LEFT JOIN '.$db->prefix.'forum_perms AS fp ON (fp.forum_id=f.id AND fp.group_id='.$pun_user['g_id'].') LEFT JOIN '.$db->prefix.'forums AS pf ON f.parent_forum_id=pf.id WHERE (fp.read_forum IS NULL OR fp.read_forum=1) AND t.id='.$id.' AND t.moved_to IS NULL') or error('Unable to fetch topic info', __FILE__, __LINE__, $db->error());
else
$result = $db->query('SELECT pf.forum_name AS parent_forum, f.parent_forum_id, t.subject, t.closed, t.num_replies, t.sticky, f.id AS forum_id, f.forum_name, f.moderators, fp.post_replies, 0 FROM '.$db->prefix.'topics AS t INNER JOIN '.$db->prefix.'forums AS f ON f.id=t.forum_id LEFT JOIN '.$db->prefix.'forum_perms AS fp ON (fp.forum_id=f.id AND fp.group_id='.$pun_user['g_id'].') LEFT JOIN '.$db->prefix.'forums AS pf ON f.parent_forum_id=pf.id WHERE (fp.read_forum IS NULL OR fp.read_forum=1) AND t.id='.$id.' AND t.moved_to IS NULL') or error('Unable to fetch topic info', __FILE__, __LINE__, $db->error());
if (!$db->num_rows($result))
message($lang_common['Bad request']);
REPLACE WITH
// Fetch some info about the topic
if (!$pun_user['is_guest'])
$result = $db->query('SELECT pf.forum_name AS parent_forum, f.parent_forum_id, t.subject, t.closed, t.num_replies, t.sticky, f.id AS forum_id, f.forum_name, f.moderators, fp.post_replies, s.user_id AS is_subscribed FROM '.$db->prefix.'topics AS t INNER JOIN '.$db->prefix.'forums AS f ON f.id=t.forum_id LEFT JOIN '.$db->prefix.'subscriptions AS s ON (t.id=s.topic_id AND s.user_id='.$pun_user['id'].') LEFT JOIN '.$db->prefix.'forum_perms AS fp ON (fp.forum_id=f.id AND fp.group_id='.$pun_user['g_id'].') LEFT JOIN '.$db->prefix.'forums AS pf ON f.parent_forum_id=pf.id WHERE (fp.read_forum IS NULL OR fp.read_forum=1) AND t.id='.$id.' AND t.moved_to IS NULL') or error('Unable to fetch topic info', __FILE__, __LINE__, $db->error());
else
$result = $db->query('SELECT pf.forum_name AS parent_forum, f.parent_forum_id, t.subject, t.closed, t.num_replies, t.sticky, f.id AS forum_id, f.forum_name, f.moderators, fp.post_replies, 0 FROM '.$db->prefix.'topics AS t INNER JOIN '.$db->prefix.'forums AS f ON f.id=t.forum_id LEFT JOIN '.$db->prefix.'forum_perms AS fp ON (fp.forum_id=f.id AND fp.group_id='.$pun_user['g_id'].') LEFT JOIN '.$db->prefix.'forums AS pf ON f.parent_forum_id=pf.id WHERE (fp.read_forum IS NULL OR fp.read_forum=1) AND t.id='.$id.' AND t.moved_to IS NULL') or error('Unable to fetch topic info', __FILE__, __LINE__, $db->error());
if (!$db->num_rows($result) && $pun_user['is_guest'])
redirect('register.php', 'Redirecting to registration page...');
else if (!$db->num_rows($result))
message($lang_common['Bad request']);