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Mastering Drupal 8

Mastering Drupal 8

By : Sean Montague, Chaz Chumley, William Hurley
4.2 (5)
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Mastering Drupal 8

Mastering Drupal 8

4.2 (5)
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 (17 chapters)
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Control structures


There will be situations while theming with Twig where we will need to check whether a variable is True or False, or to loop through a variable to output multiple values contained in an array.

Control structures in Twig allow us to account for these types of functions using {%... %} blocks to test for expressions and traverse through variables that contain arrays. Each control structure contains an opening and closing tag, like PHP logic. Let's look at a couple of the most commonly used control structures, starting with the if tag used to test an expression.

Open page.html.twig and add the following:

{# Conditional logic #} {% set offline = false %} {% if offline == true %} <p>Website is in maintenance mode.</p> {% endif %} 

If we save our template and refresh the browser, we will not see anything displaying yet. The reason is that the offline variable is currently set to false and we are checking to see whether it is true.

Open page.html.twig and edit the offline...

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