ขอความช่วยเหลือหน่อยครับคือขอถามหน่อยครับ เกี่ยวกับ sprintf

 $qry = sprintf('(nickname LIKE "%%%1$s%%" OR '.
                           ' fullname LIKE "%%%1$s%%" OR '.
                           ' location LIKE "%%%1$s%%" OR '.
                           ' bio      LIKE "%%%1$s%%" OR '.
                           ' homepage LIKE "%%%1$s%%")', $this->target->escape($q, true));

 function escape($string, $likeEscape=false)
    {
        global $_DB_DATAOBJECT;
        $this->_connect();
        $DB = &$_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
        // mdb2 uses escape...
        $dd = empty($_DB_DATAOBJECT['CONFIG']['db_driver']) ? 'DB' : $_DB_DATAOBJECT['CONFIG']['db_driver'];
        $ret = ($dd == 'DB') ? $DB->escapeSimple($string) : $DB->escape($string);
        if ($likeEscape) {
            $ret = str_replace(array('_','%'), array('\_','\%'), $ret);
        }
        return $ret;
        
    }