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Mastering Drupal 8

You're reading from   Mastering Drupal 8 An advanced guide to building and maintaining Drupal websites

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Product type Paperback
Published in Jul 2017
Publisher Packt
ISBN-13 9781785885976
Length 456 pages
Edition 1st Edition
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Authors (3):
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Chaz Chumley Chaz Chumley
Author Profile Icon Chaz Chumley
Chaz Chumley
William Hurley William Hurley
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William Hurley
Sean Montague Sean Montague
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Sean Montague
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Toc

Table of Contents (17) Chapters Close

Preface 1. Developer Workflow FREE CHAPTER 2. Site Configuration 3. Managing Users, Roles, and Permissions 4. Content Types, Taxonomy, and Comment Types 5. Working with Blocks 6. Content Authoring, HTML5, and Media 7. Understanding Views 8. Theming Essentials 9. Working with Twig 10. Extending Drupal 11. Working with Forms and the Form API 12. RESTful Services 13. Multilingual Capabilities 14. Configuration Management 15. Site Migration 16. Debugging and Profiling

Filters


Filters provide us with a way to modify variables. Filters are generally separated by a pipe character | and may accept arguments depending on the filter's purpose. Twig currently provides us with 30-plus filters that we can apply to variables.

Let's try out filters now by applying an uppercase filter on our name variable.

Open page.html.twig and add the following:

{# Apply filter to name variable #} <p>{{ name|upper }} Rocks.</p> 

If we save our template and refresh the browser, we will now see that the name variable is converted to uppercase inside our paragraph tag.

We can also use filters to wrap sections of HTML and variables, which apply the filter to more than one item at a time. An example of this would be if we wanted to uppercase a whole paragraph versus just the name variable.

Open page.html.twig and add the following:

<p> {% filter upper %} {{ name }} is the best cms around. {% endfilter %} </p> 

If we save our template and refresh the browser, we will...

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