Book Image

WordPress Plugin Development Cookbook - Second Edition

By : Yannick Lefebvre
Book Image

WordPress Plugin Development Cookbook - Second Edition

By: Yannick Lefebvre

Overview of this book

WordPress is a popular, powerful, and open Content Management System. Learning how to extend its capabilities allows you to unleash its full potential, whether you're an administrator trying to find the right extension, a developer with a great idea to enhance the platform for the community, or a website developer working to fulfill a client's needs. This book shows readers how to navigate WordPress' vast set of API functions to create high-quality plugins with easy-to-configure administration interfaces. With new recipes and materials updated for the latest versions of WordPress 4.x, this second edition teaches you how to create plugins of varying complexity ranging from a few lines of code to complex extensions that provide intricate new capabilities. You'll start by using the basic mechanisms provided in WordPress to create plugins and execute custom user code. You will then see how to design administration panels, enhance the post editor with custom fields, store custom data, and modify site behavior based on the value of custom fields. You'll safely incorporate dynamic elements on web pages using scripting languages, and build new widgets that users will be able to add to WordPress sidebars and widget areas. By the end of this book, you will be able to create WordPress plugins to perform any task you can imagine.
Table of Contents (20 chapters)
Title Page
About the Author
About the Reviewers
Customer Feedback

Adding Quick Edit fields for custom categories

A great feature of WordPress is the ability for site editors to quickly make changes to any post in the admin section by clicking on the Quick Edit link associated with any of the items shown. While our custom post type taxonomy appears in the Quick Edit section, it is not a drop-down list of choices as we had in the book review editor. Also, the author and rating fields do not appear in any way in the Quick Edit section.

This recipe shows how to add custom fields while quickly editing book reviews. As you perform the following steps, you will see that some of the code that we put in place is not as cleanly written as code from previous recipes, since the WordPress Quick Edit customization infrastructure is not as well-formed as other areas of the platform.

Getting ready

You should have already followed the Adding filters for custom categories to the custom post list page recipe to have a starting point for this recipe, and the resulting plugin...