MyBB Community Forums

This is the code in forumdisplay.php which sets the $colspan variable. The condition is based on the presence or lack of ratings. The last part increments the column count for mod editing.

if($mybb->settings['allowthreadratings'] != 0 && $foruminfo['allowtratings'] != 0 && $fpermissions['canviewthreads'] != 0)
{
	$lang->load("ratethread");

	switch($db->type)
	{
		case "pgsql":
			$ratingadd = "CASE WHEN t.numratings=0 THEN 0 ELSE t.totalratings/t.numratings::numeric END AS averagerating, ";
			break;
		default:
			$ratingadd = "(t.totalratings/t.numratings) AS averagerating, ";
	}

	$lpbackground = "trow2";
	eval("\$ratingcol = \"".$templates->get("forumdisplay_threadlist_rating")."\";");
	eval("\$ratingsort = \"".$templates->get("forumdisplay_threadlist_sortrating")."\";");
	$colspan = "7";
}
else
{
	if($sortfield == "averagerating")
	{
		$t = "t.";
		$sortfield = "lastpost";
	}
	$ratingadd = '';
	$lpbackground = "trow1";
	$colspan = "6";
}

if($ismod) 
{ 
    ++$colspan; 
} 

I have a theme that adds a column, but do not want to modify the default theme. How can I add a conditional increment based on a specific theme id, or better a named theme?

My goal is to preserve a legacy theme from 1.6.8 after update to 1.8.9 (and beyond). I've seen discussion elsewhere in the MyBB community where (1) using a plugin for theme conditions, (2) hard coding the table in the theme, or (3) modifying the php source works.

Suggestions?
Thanks for your help

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Fixed by finding the excellent variable reference referred in other posts.
Then I made a core file edit by adding to forumdisplay.php

if($theme['tid'] = "8") // added for extra column in old black times 
{ 
    ++$colspan; 
}

Tested and verified by both moderator and non-moderator users on both default and legacy themes.
In any forum update, I will have to manually add the mod code after verifying the theme id is still 8.

I've answered my own question as encouragement for others to experiment, preferably on a test forum before making it live.