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

Displaying additional columns in the custom post list page

After customizing the post editor to give content creators a tailored environment to create and edit custom post type entries, this recipe turns its efforts toward the Book Reviews management page, where all the entries for this type are listed. By default, custom post type listings are quite simple and only show the title, publication date, and the number of comments for each item. To make it easier to identify, sort, and find data in this management page, WordPress offers a number of customization capabilities, starting with the ability to change the columns that are displayed.

This recipe shows how to add and remove columns in the post management page, as well as make sorting in new columns possible.

Getting ready

You should have already followed the Hiding the category editor from the custom post type editor recipe to have a starting point for this recipe, and the resulting plugin should still be active in your development site...