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

Formatting admin pages using meta boxes

As a plugin's administration page becomes longer and more complex, it becomes important to divide its content into multiple sections. While standard HTML headers or fieldset tags could be used for this task, they lack the usefulness and nice visual appearance of meta boxes. Meta boxes are the containers that show up in most default WordPress content editors, as well as on the main administration Dashboard page.

Beyond visually organizing content, meta boxes are very powerful, since they allow site administrators to collapse configuration sections that they don't use, re-order sections based on their needs, and even hide elements that they don't use.

This recipe explains how to convert the HTML-based configuration page that was created earlier in this chapter to use the built-in meta box system.

Getting ready

You should have already followed the Accessing user settings from action and filter hooks recipe. Alternatively, you can get the resulting code (Chapter...