Book Image

Drupal 8 Development Cookbook - Second Edition

By : Matt Glaman
Book Image

Drupal 8 Development Cookbook - Second Edition

By: Matt Glaman

Overview of this book

Began as a message board, Drupal today is open source software maintained and developed by a community of over 1,000,000 users and developers. Drupal is used by numerous local businesses to global corporations and diverse organizations all across the globe. With Drupal 8’s exciting features it brings, this book will be your go-to guide to experimenting with all of these features through helpful recipes. We’ll start by showing you how to customize and configure the Drupal environment as per your requirements, as well as how to install third-party libraries and then use them in the Drupal environment. Then we will move on to creating blocks and custom modules with the help of libraries. We will show you how to use the latest mobile-first feature of Drupal 8, which will help you make your apps responsive across all the major platforms. This book will also show you how to incorporate multilingual facilities in your sites, use web services and third-party plugins with your applications from inside Drupal 8, and test and deploy your apps.
Table of Contents (20 chapters)
Title Page
About the Author
About the Reviewer
Customer Feedback

Creating a form

In this recipe, we will create a form, which will be accessible from a menu path. This will involve creating a route that tells Drupal to invoke our form and display it to the end user.

Forms are defined as classes, which implement \Drupal\Core\Form\FormInterface. The \Drupal\Core\Form\FormBase serves as a utility class that is intended to be extended. We will extend this class to create a new form.

Getting ready

Since we will write the code, you will want to have a custom module. Creating a custom module in Drupal is simple: create a folder and an info.yml file. For this recipe, we will create a folder under /modules in your Drupal folder called drupalform.

In the drupalform folder, create Drupal will parse the info.yml file to discover modules. An example of a module's info.yml file is as follows:

name: Drupal form example 
description: Create a basic Drupal form, accessible from a route 
type: module 
version: 1.0 
core: 8.x 

The name will be your module...