yii\db\BaseActiveRecord::getAttribute PHP Method

    public function getAttribute($name)
    {
        return isset($this->_attributes[$name]) ? $this->_attributes[$name] : null;
    }

 /**
  * Returns the status string of the next valid status from the list of transitions
  *
  * @param BaseActiveRecord|SimpleWorkflowBehavior $model
  * @return string
  */
 public static function getNextStatus($model)
 {
     $currentStatus = $model->getAttribute('status');
     $statusList = $model->getWorkflowSource()->getAllStatuses($model->getWorkflow()->getId());
     $transitions = array_keys(WorkflowHelper::getNextStatusListData($this->owner));
     $started = false;
     foreach ($statusList as $status) {
         $status_id = $status->getId();
         if ($started) {
             if (in_array($status_id, $transitions) && static::isValidNextStatus($model, $status_id)) {
                 return $status_id;
             }
         }
         if ($status_id == $currentStatus) {
             $started = true;
         }
     }
     return $currentStatus;
 }