too long

I am a Zend Framework beginner. I guess My question is very basic... but I can't solve it by myself.

In indexAction, $request->isPost() is always false. What is happening?

EntryController::indexAction

public function indexAction() {
    $form = new AgreementForm();
    $form->get('submit')->setValue('Go Entry Form');
    $request = $this->getRequest();
    if ($request->isPost()) {
        var_dump('//// $request->isPost() is true //////');
        if ($form->get('agreementCheck')) {
            // Redirect to list of entries
            return $this->redirect()->toRoute('entry');
        } else {
            return array('form' => $form);
        }
    } else {
        var_dump('//// $request->isPost() is false //////');
        return array('form' => $form);
    }
}

form in index.phtml

<?php
$form = $this->form;
$form->setAttribute('action', $this->url('entry', array('action' => 'index')));
$form->prepare();
echo $this->form()->openTag($form);
echo $this->formCheckbox($form->get('agreementCheck'));
echo $this->formSubmit($form->get('submit'));
echo $this->form()->closeTag();
?>

AgreementForm is generated using code generator. http://zend-form-generator.123easywebsites.com/formgen/create as below.

class AgreementForm extends Form {

    public function __construct($name = null) {
        parent::__construct('');

        $this->setAttribute('method', 'post');

        $this->add(array(
            'name' => 'agreementCheck',
            'type' => 'Zend\Form\Element\MultiCheckbox',
            'attributes' => array(
                'required' => 'required',
                'value' => '0',
            ),
            'options' => array(
                'label' => 'Checkboxes Label',
                'value_options' => array(
                    '0' => 'Checkbox',
                ),
            ),
        ));

        $this->add(array(
            'name' => 'csrf',
            'type' => 'Zend\Form\Element\Csrf',
        ));

        $this->add(array(
            'name' => 'submit',
            'attributes' => array(
                'type' => 'submit',
                'value' => 'Go',
                'id' => 'submitbutton',
            ),
        ));
    }
}

Please tell me some hints.

update: In the result of analysis by Developer Tools, POST and GET works at the same time.

update: router definition @module.config.php is this.

'router' => array(
        'routes' => array(
            'entry' => array(
                'type' => 'segment',
                'options' => array(
                    'route' => '/entry[/][:action][/:id]',
                    'constraints' => array(
                        'action' => '[a-zA-Z][a-zA-Z0-9_-]*',
                        'id' => '[0-9]+',
                    ),
                    'defaults' => array(
                        'controller' => 'Entry\Controller\Entry',
                        'action' => 'index',
                    ),
                ),
            ),
            'home' => array(
                'type' => 'Zend\Mvc\Router\Http\Literal',
                'options' => array(
                    'route' => '/',
                    'defaults' => array(
                        'controller' => 'Entry\Controller\Entry',
                        'action' => 'index',
                    ),
                ),
            ),
        ),
    ),

A few things are wrong:

1. In the form class you add a csrf element, but you don't render it in the view. This will cause a validation error. So you need to add this to your view:

   echo $this->formHidden($form->get('csrf'));

2. You're adding a Multicheckbox element to the form, but in your view you're using the formCheckbox view helper to render it. If you really want a Multicheckbox then you should render it with the formMultiCheckbox helper:

   echo $this->formMultiCheckbox($form->get('agreementCheck'));

After these changes it should work.

Edit: Also you may want to pass a name to the form constructor:

parent::__construct('agreementform');

I think, you do not need to explicitly say

$form->setAttribute('action', $this->url('entry', array('action' => 'index')));

Omit that line, and see what happens.