The document discusses the Form API in Drupal 8. It notes that Drupal 8 is object-oriented and so the Form API is now object-oriented as well. It provides an example of a simple form class that implements the FormInterface and includes methods for building, validating, and submitting the form. It also discusses extending the SystemConfigFormBase class to create configuration forms and calling the parent buildForm method.

1. Form API – Drupal 8
Крайнюк Михаил

2. Drupal 8 – объектно-ориентирован.
Form API теперь тоже…

3. <?php
/**
* @file
* Contains DrupalExampleFormExampleForm.
*/
namespace DrupalexampleForm;
use DrupalCoreFormFormInterface;
/**
* Provides a simple example form.
*/
class ExampleForm implements FormInterface {
}
public function getFormID()
public function buildForm(array $form, array &$form_state)
public function validateForm(array &$form, array &$form_state)
public function submitForm(array &$form, array &$form_state)

4. public function buildForm(array $form, array &$form_state) {
$form['my_text_field'] = array(
'#type' => 'textfield',
'#title' => 'Example',
);
return $form;
}
Form Builder

5. public function validateForm(array $form, FormStateInterface &$form_state) {
if (strlen($form_state->getValue('phone_number')) < 3) {
$form_state->setErrorByName('phone_number', $this->t('The phone number is too short.'));
}
}
Form Validate

6. use DrupalsystemSystemConfigFormBase;
class ExampleConfigForm extends SystemConfigFormBase {
/**
* Implements DrupalCoreFormFormInterface::getFormID().
*/
public function getFormID() {
return 'example_systemconfigformbase';
}
/**
* Implements DrupalCoreFormFormInterface::buildForm().
*/
public function buildForm(array $form, array &$form_state) {
$form = parent::buildForm($form, $form_state);
// Use the Form API to define form elements.
return $form;
}
…
system_settings_form()

7. Спасибо!
Крайнюк Михаил
kraynuk.m@i20.biz