/***************************** Module.config.php *****************************/

<?php
namespace Application;

return array(
    'router' => array(
        'routes' => array(
            'home' => array(
                'type' => 'segment',
                'options' => array(
            'route'    => '[/:lang]/',
                    'constraints'   =>  array(
                        'lang'  =>  '[a-zA-Z][a-zA-Z0-9_-]*'
                        ),
                    'defaults' => array(
                        'controller' => 'Application\Controller\Index',
                        'action'     => 'index',
                        'lang' =>  'en_US'
                        ),
                    ),
                'may_terminate' => true,
                'child_routes' => array(
                    'registerCaptcha' => array(
                        'type'    => 'segment',
                        'options' => array(
                            'route'    => '/[:action[/]]',
                            'constraints' => array(
                                'action' => '[a-zA-Z][a-zA-Z0-9_-]*',
                                ),
                            'defaults' => array(
                                'action' => 'register',
                                ),
                            ),
                        ),

                    'captcha' => array(
                        'type'    => 'segment',
                        'options' => array(
                            'route'    =>  '/captcha/[:id]',
                            'constraints' => array(
                                'action' => '[a-zA-Z][a-zA-Z0-9_-]*',
                                ),
                            'defaults' => array(
                                'controller' => 'Application\Controller\Index',
                                'action'     => 'generate',
                                )
                            )
                        )
                    )
                ),
            'login' => array(
                'type' => 'segment',
                'options' => array(
                    'route'    => '[/:lang]/login[/][:action][/:id]',
                    'constraints'   =>  array(
                        'lang'  =>  '[a-zA-Z][a-zA-Z0-9_-]*'),
                    'defaults' => array(
                        'controller' => 'Application\Controller\Login',
                        'action'     => 'index',
                        ),
                    ),

                ),
[...]


/***************************** ACTIONS *****************************/
Action Forget My Password (In LoginController)

<?php
public function forgetMyPasswordAction()
    {
        // todo @gustavo: criar função de esqueci senha

        $entityManager = $this->getEntityManager();

        $urlCaptcha = $this->getRequest()->getBaseUrl().'/home/captcha';

        // passing entityManager and urlCaptcha objects
        $form = new UsuariosForm($entityManager, $urlCaptcha);

        // some stuff

        if ($this->request->isPost())
        {
            // stuff
        }

        return array('form' => $form, 'lang' => $this->translator->getLocale());
    }
?>

Action in IndexController:
<?php
    /**
     * Generate Captcha
     */
    public function generateAction()
    {
        $response = $this->getResponse();
        $response->getHeaders()->addHeaderLine('Content-Type', "image/png");

        $id = $this->params('id', false);

        if ($id) {

            $image = './data/captcha/' . $id;

            if (file_exists($image) !== false) {
                $imagegetcontent = @file_get_contents($image);

                $response->setStatusCode(200);
                $response->setContent($imagegetcontent);

                if (file_exists($image) == true) {
                    unlink($image);
                }
            }

        }

        return $response;
    }
?>

/***************************** VIEW *****************************/

<?php

namespace Application;

$title = "Forget My Password";
$this->headTitle($title);
?>

<p>
    <a href="<?php echo $this->url("login", array('action'=>'forgetMyPassword', 'lang' => $locale))?>"><?php echo $this->escapeHtml($this->translate("Sign Up")) ?></a>
</p>

<?php

$form->setAttribute('action' , $this->url('login', array('action' =>'forgetMyPassword', 'lang' => $locale)));

$form->prepare();
echo $this->form()->openTag($form);
echo $this->formRow($form->get('email'));
echo $this->formRow($form->get('captcha'));
echo $this->formSubmit($form->get('submit'));
echo $this->form()->closeTag();

/***************************** FORM *****************************/

<?php
namespace Application\Form\Usuarios;

use Doctrine\Common\Persistence\ObjectManager;
use DoctrineModule\Stdlib\Hydrator\DoctrineObject as DoctrineHydrator;
use Zend\Captcha\Image as CaptchaImage;
use Zend\Form\Form;
use Zend\Form\Element;
use Zend\Form\Element\Captcha;
use Zend\InputFilter\InputFilter;

class UsuariosForm extends Form
{

    /**
     * undocumented function
     *
     * @return void
     * @author
     **/
    public function __construct(ObjectManager $objectManager, $urlCaptcha = null)
    {
        parent::__construct('Usuarios');

        $this->setAttribute('enctype', 'multipart/form-data');
        $this->setAttribute('method', 'post');

        $this->setHydrator(new DoctrineHydrator($objectManager, 'Application\Entity\Usuarios'));

        $dirdata = './data';
        //pass captcha image options
        $captchaImage = new CaptchaImage(  array(
            'font' => $dirdata . '/fonts/Arial.ttf',
            'width' => 250,
            'height' => 100,
            'dotNoiseLevel' => 40,
            'lineNoiseLevel' => 3)
        );
        $captchaImage->setImgDir($dirdata.'/captcha');
        $captchaImage->setImgUrl($urlCaptcha);

        $this->add(
            array(
                'type'      =>      'hidden',
                'name'      =>      'idUsuarios'
                )
                 //add captcha element...
            ->add(array(
                'type' => 'Zend\Form\Element\Captcha',
                'name' => 'captcha',
                'options' => array(
                    'label' => 'Please verify you are human',
                    'captcha' => $captchaImage,
                    ),
                )

             //add captcha element...
            // @gustavo: Dummy Captcha (letters backwards and stuff)
            // ->add(array(
            //  'type' => 'Zend\Form\Element\Captcha',
            //  'name' => 'captcha',
            //  'options' => array(
            //      'label' => 'Please verify you are human',
            //      'captcha' => array(
            //          'class' => 'Dumb'
            //          ),
            //      ),
            //  )
            )->add(array(
                'name'      =>      'submit',
                'attributes'    =>  array(
                    'type'      =>  'submit',
                    'value'     =>  'Go',
                    'id'        =>  'submitbutton'
                    )
                ));
            }
        }