Book Image

Mastering Drupal 8

By : Sean Montague, Chaz Chumley, William Hurley
Book Image

Mastering Drupal 8

By: Sean Montague, Chaz Chumley, William Hurley

Overview of this book

Drupal is an open source content management system trusted by governments and organizations around the globe to run their websites. It brings with it extensive content authoring tools, reliable performance, and a proven track record of security. The community of more than 1,000,000 developers, designers, editors, and others have developed and maintained a wealth of modules, themes, and other add-ons to help you build a dynamic web experience. Drupal 8 is the latest release of the Drupal built on the Symfony2 framework. This is the largest change to the Drupal project in its history. The entire API of Drupal has been rebuilt using Symfony and everything from the administrative UI to themes to custom module development has been affected. This book will cover everything you need to plan and build a complete website using Drupal 8. It will provide a clear and concise walkthrough of the more than 200 new features and improvements introduced in Drupal core. In this book, you will learn advanced site building techniques, create and modify themes using Twig, create custom modules using the new Drupal API, explore the new REST and Multilingual functionality, import, and export Configuration, and learn how to migrate from earlier versions of Drupal.
Table of Contents (25 chapters)
Title Page
Credits
About the Author
Acknowledgments
About the Author
About the Reviewer
Customer Feedback
www.PacktPub.com
Preface

Creating and managing forms


In this section, let's learn how to create new forms and manage them.

Creating a new form

In Drupal 7, a form was a function that returned an array containing nested elements from the Form API. Then, you would add appropriate _validate and _submit functions to handle verifying the submission and to handle the completed form in a simple case that would look as follows:

function my_module_my_form($form, &$form_state) 
  $form['first'] = array( 
    '#type' => 'textfield', 
    '#title' => t('First name'), 
    '#required' => TRUE, 
  ); 
  $form['last'] = array( 
    '#type' => 'textfield', 
    '#title' => t('Last name'), 
    '#required' => TRUE, 
  ); 
  $form['submit'] = array( 
    '#type' => 'submit', 
    '#value' => 'Submit', 
  ); 
 
  return $form; 
} 
 
function my_module_my_form_validate($form, &$form_state) { 
  // Handle form validation 
} 
 
function my_module_my_form_submit($form, &$form_state) { 
  // Handle form...