Piwik\Plugins\Live\Model::getNumVisitors PHP Method

    public function getNumVisitors($idSite, $lastMinutes, $segment)
    {
        return $this->getLastMinutesCounterForQuery($idSite, $lastMinutes, $segment, 'COUNT(DISTINCT log_visit.idvisitor)', 'log_visit', 'log_visit.visit_last_action_time >= ?');
    }

 /**
  * This will return simple counters, for a given website ID, for visits over the last N minutes
  *
  * @param int $idSite Id Site
  * @param int $lastMinutes Number of minutes to look back at
  * @param bool|string $segment
  * @param array $showColumns The columns to show / not to request. Eg 'visits', 'actions', ...
  * @param array $hideColumns The columns to hide / not to request. Eg 'visits', 'actions', ...
  * @return array( visits => N, actions => M, visitsConverted => P )
  */
 public function getCounters($idSite, $lastMinutes, $segment = false, $showColumns = array(), $hideColumns = array())
 {
     Piwik::checkUserHasViewAccess($idSite);
     $model = new Model();
     $counters = array();
     $hasVisits = true;
     if ($this->shouldColumnBePresentInResponse('visits', $showColumns, $hideColumns)) {
         $counters['visits'] = $model->getNumVisits($idSite, $lastMinutes, $segment);
         $hasVisits = !empty($counters['visits']);
     }
     if ($this->shouldColumnBePresentInResponse('actions', $showColumns, $hideColumns)) {
         if ($hasVisits) {
             $counters['actions'] = $model->getNumActions($idSite, $lastMinutes, $segment);
         } else {
             $counters['actions'] = 0;
         }
     }
     if ($this->shouldColumnBePresentInResponse('visitors', $showColumns, $hideColumns)) {
         if ($hasVisits) {
             $counters['visitors'] = $model->getNumVisitors($idSite, $lastMinutes, $segment);
         } else {
             $counters['visitors'] = 0;
         }
     }
     if ($this->shouldColumnBePresentInResponse('visitsConverted', $showColumns, $hideColumns)) {
         if ($hasVisits) {
             $counters['visitsConverted'] = $model->getNumVisitsConverted($idSite, $lastMinutes, $segment);
         } else {
             $counters['visitsConverted'] = 0;
         }
     }
     return array($counters);
 }