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 a custom widget to the network dashboard

As discussed in the recipe titled Creating network-level admin pages back in Chapter 3, User Settings and Administration Pages, WordPress offers a very powerful mode called Network mode, which allows for multiple websites to be served from a single installation of the platform. When creating a plugin, developers need to think if it would make sense for their plugin to offer a dashboard widget that would only be seen in the network administrator's dashboard instead of being seen in individual website dashboards, or if their plugin's scope is really more relevant at each website's level. The following recipe shows how to modify the dashboard widget defined in the previous recipe so that it appears in the network administration panel on network installations, while still appearing in the administration dashboard in single site installations.

Getting ready

You should have already followed the Adding a custom dashboard widget recipe to have a starting...