Controller

<?php

/**
 * Zend Framework (http://framework.zend.com/)
 *
 * @link      http://github.com/zendframework/ZendSkeletonApplication for the canonical source repository
 * @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd New BSD License
 */

namespace Application\Controller;

use Zend\Mvc\Controller\AbstractActionController;
use Application\Form\UploadForm;

class FileController extends AbstractActionController {

    public function indexAction() {
        $form = new UploadForm('upload-form');
        $tempFile = null;

        $prg = $this->fileprg($form);
        if ($prg instanceof \Zend\Http\PhpEnvironment\Response) {
            return $prg; // Return PRG redirect response
        } elseif (is_array($prg)) {
            if ($form->isValid()) {
                $data = $form->getData();
                // Form is valid, save the form!
                return $this->redirect()->toRoute('upload-form/success');
            } else {
                // Form not valid, but file uploads might be valid...
                // Get the temporary file information to show the user in the view
                $fileErrors = $form->get('image-file')->getMessages();
                if (empty($fileErrors)) {
                    $tempFile = $form->get('image-file')->getValue();
                }
            }
        }

        return array(
            'form' => $form,
            'tempFile' => $tempFile,
        );
    }

}