QueryForm::readInputData PHP Method

    function readInputData()
    {
        $this->readUserVars(array('subject', 'comment', 'users'));
    }

 /**
  * Save a query
  * @param $args array
  * @param $request PKPRequest
  * @return JSONMessage JSON object
  */
 function updateQuery($args, $request)
 {
     $query = $this->getQuery();
     if (!$this->getAccessHelper()->getCanEdit($query->getId())) {
         return new JSONMessage(false);
     }
     import('lib.pkp.controllers.grid.queries.form.QueryForm');
     $queryForm = new QueryForm($request, $this->getAssocType(), $this->getAssocId(), $this->getStageId(), $query->getId());
     $queryForm->readInputData();
     if ($queryForm->validate()) {
         $queryForm->execute($request);
         return DAO::getDataChangedEvent($query->getId());
     }
     return new JSONMessage(true, $queryForm->fetch($request, array_merge($this->getRequestArgs(), array('queryId' => $query->getId()))));
 }