You're reading from WordPress Plugin Development Cookbook Explore the complete set of tools to craft powerful plugins that extend the world's most popular CMS

Product type Paperback

Published in Mar 2022

Publisher Packt

ISBN-13 9781801810777

Length 420 pages

Edition 3rd Edition

Languages

JavaScript

Tools

WordPress

Concepts

CMS

Author (1):

Yannick Lefebvre

View More author details

Table of Contents (15) Chapters

Preface

1. Chapter 1: Preparing a Local Development Environment

2. Chapter 2: Plugin Framework Basics FREE CHAPTER

3. Chapter 3: User Settings and Administration Pages

4. Chapter 4: The Power of Custom Post Types

5. Chapter 5: Customizing Post and Page Editors

6. Chapter 6: Extending the Block Editor

7. Chapter 7: Accepting User Content Submissions

8. Chapter 8: Customizing User Data

9. Chapter 9: Leveraging JavaScript, jQuery, and AJAX Scripts

10. Chapter 10: Adding New Widgets to the WordPress Library

11. Chapter 11: Fetching, Caching, and Regularly Updating External Site Data

12. Chapter 12: Enabling Plugin Internationalization

13. Chapter 13: Distributing Your Plugin on WordPress.org

14. Other Books You May Enjoy

Packt is searching for authors like you

Removing plugin data on deletion

As with any piece of software, it is quite possible that users might decide to remove a plugin from their WordPress installation if they no longer require the functionality that it provides, or they have found an alternative that they prefer.

When this happens, the plugin author must decide whether all of the configuration data stored in the site's database should be left in place, making it easier to re-install the plugin down the road, or to remove all of this information, leaving a clean database behind.

Getting ready

You should have already followed the Storing user settings using arrays recipe to have options data ready for deletion, and the resulting plugin should still be active on your development site. Alternatively, you can get the resulting code (ch3/ch2-page-header-output/ch2-page-header-output-v3.php) from the book's GitHub page. You should rename the ch2-page-header-output-v3.php file as ch2-page-header-output.php and...