Nette\Forms\Form::getHttpData PHP Method

    public function getHttpData($type = NULL, $htmlName = NULL)
    {
        if ($this->httpData === NULL) {
            if (!$this->isAnchored()) {
                throw new Nette\InvalidStateException('Form is not anchored and therefore can not determine whether it was submitted.');
            }
            $data = $this->receiveHttpData();
            $this->httpData = (array) $data;
            $this->submittedBy = is_array($data);
        }
        if ($htmlName === NULL) {
            return $this->httpData;
        }
        return Helpers::extractHttpData($this->httpData, $htmlName, $type);
    }

 private function pageSaving(\Nette\Forms\Form $form, $isDraft)
 {
     if (!$this->authorizator->isAllowed($this->user, 'page', 'create') or !$this->authorizator->isAllowed($this->user, 'page', 'edit')) {
         $this->flashMessage('authorization.noPermission', FlashMessage::WARNING);
         return;
     }
     $values = $form->getValues(true);
     $values['saveAsDraft'] = (bool) $isDraft;
     $values['author'] = $this->user;
     $tags = $form->getHttpData(Form::DATA_TEXT, 'tags[]');
     $values['tags'] = $tags;
     try {
         $page = $this->pageFacade->save($values, $this->page);
         $this->flashMessage('pageEditForm.messages.success' . ($values['saveAsDraft'] ? 'Draft' : 'Publish'), FlashMessage::SUCCESS);
         $this->onSuccessPageSaving($this, $page);
     } catch (PagePublicationTimeMissingException $ptm) {
         $form->addError($this->translator->translate('pageEditForm.messages.missingPublicationTime'));
         return;
     } catch (PagePublicationTimeException $pt) {
         $form->addError($this->translator->translate('pageEditForm.messages.publishedPageInvalidPublicationTime'));
         return;
     } catch (PageIntroHtmlLengthException $pi) {
         $form->addError($this->translator->translate('pageEditForm.messages.pageIntroHtmlLength'));
         return;
     } catch (PageTitleAlreadyExistsException $at) {
         $form->addError($this->translator->translate('pageEditForm.messages.titleExists'));
         return;
     } catch (UrlAlreadyExistsException $ur) {
         $form['url']->setValue(Strings::webalize($values['title'], '/'));
         $form->addError($this->translator->translate('pageEditForm.messages.urlExists'));
         return;
     } catch (DBALException $e) {
         $form->addError($this->translator->translate('pageEditForm.messages.savingError'));
         return;
     }
 }