How to handle form submissions in Phalcon?

@haylee.mertz 

In Phalcon, you can handle form submissions by following these steps:

1. Create a form class: Create a class for your form by extending the PhalconFormsForm class. Add the necessary fields to the form using PhalconFormsElement classes like Text, TextArea, Select, etc.
2. Render the form in a view: Render the form in your view. Use the PhalconFormsForm::render() method to generate the necessary HTML markup for the form.
3. Handle the form submission in a controller: Create a controller action to handle the form submission. Inside this action, check if the request is a POST request (PhalconHttpRequest::isPost()) and if the form has been submitted and is valid (PhalconFormsForm::isValid()).
4. Process the form data: If the form is valid, you can access the submitted form values using the PhalconFormsForm::getValues() method. Process the form data as required, like saving it to a database or performing some other action.
5. Display success or error messages: After processing the form data, you can redirect the user to a success page or display any error messages if there were validation errors.

Example:

1. Create a form class:

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use PhalconFormsForm;
use PhalconFormsElementText;
use PhalconFormsElementSubmit;

class MyForm extends Form
{
    public function initialize()
    {
        $this->add(new Text('name'));
        $this->add(new Submit('submit', ['value' => 'Submit']));
    }
}

1. Render the form in a view:

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    render() ?>

1. Handle the form submission in a controller:

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use PhalconMvcController;

class MyController extends Controller
{
    public function formSubmitAction()
    {
        $form = new MyForm();

        if ($this->request->isPost()) {
            $data = $this->request->getPost();

            if ($form->isValid($data)) {
                // Process form data
                $name = $form->getValue('name');

                // Display success message or redirect to success page
            } else {
                // Display form validation errors
                $messages = $form->getMessages();

                foreach ($messages as $message) {
                    echo $message->getMessage(), "";
                }
            }
        }

        // Render form view
        $this->view->form = $form;
    }
}

In this example, the form is handled in the formSubmitAction() method of the MyController controller. The form data is checked for validity and processed accordingly. If there are any validation errors, they are displayed, and if the form is valid, success messages can be displayed or a redirect can be performed.