Stuff

$results = $tc_db->GetAll("SELECT * FROM `".TC_DBPREFIX."banlist` WHERE `type` = '0' AND ( `ipmd5` = '" . md5($ip) . "' OR `ipmd5` = '". md5($_COOKIE['tc_previousip']) . "' ) LIMIT 1");

then:

*EXECUTE(query blah blah) LINE HERE*
            
            /* Set a cookie with the users current IP address in case they use a proxy to attempt to make another post */
            setcookie('tc_previousip', $_SERVER['REMOTE_ADDR'], (time() + 604800), TC_BOARDSFOLDER);
            
            $this->UpdateHtaccess();