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
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Dedication
Preface

Rendering the admin page contents using the Settings API


In addition to creating administration pages through HTML code, WordPress also offers a set of functions referred to as the Settings API that can be used to automate the creation of complex configuration pages. While the work required to put this rendering technique in place is a bit overkill for plugins that only have a handful of options, it is definitely useful if you are dealing with tens or hundreds of configuration fields, simplifying the task of writing out HTML code for every single item to calling a single function for each of them. It also provides some automation around the processing and storing of plugin configuration data.

This recipe explains how to specify the contents of a configuration page using the Settings API and how to provide rendering functions for the most commonly used types of form field used in configuration pages. It uses the same set of configuration options as the other recipes in this chapter to show...