Binding a form to a database table

Symfony contains a whole framework just for the development of forms. The forms framework makes building forms easier by applying object-oriented methods to their development. Each form class is based on its related table in the database. This includes the fields, the validators, and the way in which the forms and fields are rendered.

A look at the generated base class

Rather than starting off with a simple form, we are going to look at the base form class that has already been generated for us as a part of the build task we executed earlier. Because the code is generated, it will be easier for you to see the initial flow of a form. So let's open the base class for the NewsletterSignupForm form. The file is located at lib/form/base/BaseNewsletterSignupForm.class.php:

class BaseNewsletterSignupForm extends BaseFormPropel
formbase form class{
public function setup()
{
$this->setWidgets(array(
'id' => new sfWidgetFormInputHidden(),
'first_name' =...