please clear the syntax error...
$locker_query ="update tbl_locker set locker_title='".$locker_title."',headline_text='".$locker_headline."',introductory_text='".$locker_intro_text."',popup_delay='". $locker_delay ."',repopup_frequency='".$locker_frequency."',forced_completion='".$locker_force_offer."',email_id='".$locker_email."',created_date=now(),guid='" . md5(time()). "'
where locker_id='".20."'";
Thanks