[ramesh_umk3]

For https support use below code

global $vbulletin, $vbphrase;
$vbo = &$vbulletin->options;

if ($vbo['bop5sob_en'])
{
    $staff_usergroupids = $vbo['bop5so_groups']; 
  
    $bopshowav = $vbo['bop5so_showav'];
  
    $dofonts = $vbo['bop5so_intfont'];   
    $dosizes = $vbo['bop5so_intsize'];                 
    $docolor = $vbo['bop5so_intcolor'];                 
      
    $showinvisible = $vbo['bop5so_showinvis'];
    
    $nostaffuser = $vbphrase['bop5_staff_online_none'];
    $nostaffusertitle = $vbphrase['bop5_staff_online_no_staff'];

  if (THIS_SCRIPT != 'index') 
  {
     require_once(DIR . '/includes/functions_bigthree.php');
  } 


  $cooktimeout = TIMENOW - $vbulletin->options['cookietimeout'];
  $staffcount = 0;

  $bop5_fields = '';

  if ($dofonts)
    $bop5_fields .= " , user.bop5_userfont AS bop5_userfont ";

  if ($dosizes)
    $bop5_fields .= " , user.bop5_usersize AS bop5_usersize ";

  if ($docolor)
    $bop5_fields .= " , user.bop5_usercolor AS bop5_usercolor ";


  if ($showinvisible)
  {
    $forumstaff = $vbulletin->db->query_read_slave("
        SELECT
            user.username, user.usergroupid, user.lastvisit, user.usertitle,
            session.userid, session.inforum, session.lastactivity,
            IF(displaygroupid=0, user.usergroupid, displaygroupid) AS displaygroupid, infractiongroupid
            $bop5_fields
        FROM " . TABLE_PREFIX . "session AS session
        LEFT JOIN " . TABLE_PREFIX . "user AS user ON(user.userid = session.userid)
        WHERE session.lastactivity > $cooktimeout AND user.usergroupid IN (".$staff_usergroupids .")
        ORDER BY username ASC");
  }
  else
  {
    $forumstaff = $vbulletin->db->query_read_slave("
        SELECT
            user.username, (user.options & " . $vbulletin->bf_misc_useroptions['invisible'] . ") AS invisible, user.usergroupid, user.lastvisit, user.usertitle,
            session.userid, session.inforum, session.lastactivity,
            IF(displaygroupid=0, user.usergroupid, displaygroupid) AS displaygroupid, infractiongroupid
            $bop5_fields
        FROM " . TABLE_PREFIX . "session AS session
        LEFT JOIN " . TABLE_PREFIX . "user AS user ON(user.userid = session.userid)
        WHERE session.lastactivity > $cooktimeout AND user.usergroupid IN (".$staff_usergroupids .")
        ORDER BY username ASC");
  }

  $bp5i = 0;
  while ($staffon = $vbulletin->db->fetch_array($forumstaff))
  {
      $bp5i++;
      $userid = $staffon['userid'];    
      $userinfos[$userid] = $staffon;
  }

  if (!$bp5i) //No Staff Online
  {
      $userid = 0;    
      $userinfos[$userid] = $staffon;  
      $staffon['showav'] = 0;
      $staffon['musername'] = $staffon['username'] = $nostaffuser;
      $staffon['usertitle'] = $nostaffusertitle;
      $staffon['none'] = true;
      $activestaff[0] = $staffon;
  }
  else
  {
    $activestaff = array();
    foreach ($userinfos AS $userid => $staffon)
    {
        fetch_musername($staffon);
        
        $staffon['none'] = false;
        $staffon['showav'] = $bopshowav;
        
        if ($bopshowav)
        {
          require_once('./includes/functions_user.php');
          
          $staffon['avatarurl'] = fetch_avatar_url($staffon['userid']);

          if (!$staffon['avatarurl']) 
            $staffon['avatarurl'] = $stylevar['imgdir_misc'] . 'images/misc/unknown.gif'; 
          else 
          { 
            $staffon['avatarurl'] = str_replace('http','https',$staffon['avatarurl'][0]);   
          }     
        }

        if (fetch_online_status($staffon))
        {
            $staffcount++;
            $activestaff[$staffcount] = $staffon;
        }
    }
  }

  unset($userinfos, $staffon);

  $vbulletin->db->free_result($forumstaff);

  $staffsarray = array('activestaff'	=> $activestaff); 

  return $staffsarray;
}

Credits: Exp500