$delete_old->execute($data);
 //remove previously assigned users
 //Then put in the current assignments
 $resps = array();
 foreach ($responsibles as $responsible) {
     if (stristr($responsible, '_grp_')) {
         //user has selected a group as defined in config
         $group = substr($responsible, 5);
         $all_in_group = all_users_in_group($dbh, $group);
         $resps[] = $all_in_group;
     } elseif (stristr($responsible, '_spv_')) {
         $supervisor = substr($responsible, 5);
         $all_in_group = all_users_by_supvsr($dbh, $supervisor);
         $resps[] = $all_in_group;
     } elseif (stristr($responsible, '_all_users_')) {
         $resps[] = all_active_users_a($dbh);
     } else {
         $resps[] = $responsible;
     }
 }
 $resps_flat = flatten_array($resps);
 $add_resp = $dbh->prepare("INSERT INTO cm_events_responsibles (id,event_id,username,time_added) VALUES (NULL, :last_id,:resp,NOW())");
 for ($i = 0; $i < sizeof($resps_flat); $i++) {
     $data = array('last_id' => $event_id, 'resp' => $resps_flat[$i]);
     $add_resp->execute($data);
 }
 //Then notify only the newly-added users of the assignement via email
 $new_assignees = array_diff($resps_flat, $curs_flat);
 if (!empty($new_assignees)) {
     foreach ($new_assignees as $n) {
         $email = user_email($dbh, $resps_flat[$i]);
     }
 }
 if ($new_ccs) {
     $ccs = null;
     foreach ($new_ccs as $cc) {
         //user has selected a group as defined in config
         if (stristr($cc, '_grp_')) {
             $group = substr($cc, 5);
             $all_in_group = all_users_in_group($dbh, $group);
             $ccs .= implode(',', $all_in_group) . ',';
         } elseif (stristr($cc, '_spv_')) {
             $supervisor = substr($cc, 5);
             $all_in_group = all_users_by_supvsr($dbh, $supervisor);
             $ccs .= implode(',', $all_in_group) . ',';
         } elseif (stristr($to, '_all_users_')) {
             $ccs .= implode(',', all_active_users_a($dbh)) . ',';
         } elseif (stristr($to, '_all_on_case_')) {
             $ccs .= implode(',', all__users_on_case($dbh, $assoc_case)) . ',';
         } else {
             $ccs .= $cc . ',';
         }
     }
 } else {
     $ccs = null;
 }
 //next insert into db
 $q = $dbh->prepare("INSERT INTO `cm_messages` (`id`, `thread_id`, `to`, `from`, `ccs`, `subject`, `body`, `assoc_case`, `time_sent`, `read`, `archive`, `starred`) VALUES (NULL, '', :tos, :sender, :ccs, :subject, :body, :assoc_case, CURRENT_TIMESTAMP, :sender_has_read, '', '');");
 //strip trailing commas, if present
 if (substr($tos, -1) == ',') {
     $tos = substr($tos, 0, -1);
 }