Where this hook edit should go...

[Logikos]

Hey guys, Maybe you can help me out. I'm creating a new condition to be able to use in the postbit template. The condition will be something like this:

<if condition="$check">
        <!-- $check holds information -->
<else />
        <!-- $check doesn't hold information -->
</if>

The '$check' variable will be determined like this:

PHP Code:

        $checkdata = $db->query_read("
                SELECT dateline
                FROM " . TABLE_PREFIX . "custom
                WHERE userid = " . $vbulletin->userinfo['userid'] . "
                        AND threadid = " . intval($threadid)
        );

        if ($db->num_rows($checkdata))
        {
                $check = true;
        }
        else
        {
                $check = false;
        } 


Now I want to beable to use that in my postbit_legacy template. Any ideas where in showthread.php to add the PHP code? I've tried ALL avalible hooks and none worked. Thanks