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WordPress Plugin Development Cookbook

You're reading from WordPress Plugin Development Cookbook Create powerful plugins to extend the world's most popular CMS

Product type Paperback

Published in Jul 2017

Publisher

ISBN-13 9781788291187

Length 386 pages

Edition 2nd Edition

Languages

PHP

Tools

WordPress

Concepts

CMS

Author (1):

Lefebvre

View More author details

Table of Contents (20) Chapters

Title Page

Credits

About the Author

About the Reviewers

www.PacktPub.com

Customer Feedback

Dedication

Preface

1. Preparing a Local Development Environment FREE CHAPTER

2. Plugin Framework Basics

3. User Settings and Administration Pages

4. The Power of Custom Post Types

5. Customizing Post and Page Editors

6. Accepting User Content Submissions

7. Customizing User Data

8. Creating Custom MySQL Database Tables

9. Leveraging JavaScript, jQuery, and AJAX Scripts

10. Adding New Widgets to the WordPress Library

11. Enabling Plugin Internationalization

12. Distributing Your Plugin on wordpress.org

Deleting custom tables on plugin removal

It is always a good practice for plugins to provide an uninstallation procedure to remove content that they added to a website's database or filesystem. When dealing with custom database tables, all records should be dropped along with the table itself when a website administrator decides to delete a plugin.

This recipe shows how to implement a data removal script to delete the bug storage table that was created in the previous recipe.

Getting ready

You should have already followed the Creating new database tables recipe to have an existing table to remove. Alternatively, you can get the resulting code (Chapter 8/ch8-bug-tracker/ch8-bug-tracker-v1-1.php) from the code bundle and rename the file as ch8-bug-tracker.php.

How to do it...

Navigate to the WordPress plugin directory of your development installation.
Create a text file called uninstall.php in the ch8-bug-tracker directory and open it in a code editor.
Start the new script with the standard <...

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Authors (1)

Lefebvre

Lefebvre

Yannick Lefebvre is a plugin developer who has created multiple plugins on the official WordPress repository. His first creation, Link Library, is used on thousands of sites worldwide. With a background in computer science, he wrote his first plugin in 2004 and quickly started sharing his creations with the community. He is actively involved in the Montreal WordPress community, has presented multiple times at WordCamp Montreal, and offers custom plugin development services. By day, Yannick works for CM Labs Simulations, a company providing software tools and simulators for vehicles and heavy equipment.

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