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

Creating network-level admin pages

A very powerful feature of WordPress is its ability to run multiple websites from a single installation of the platform. Each site can have its own content and its own visual identity, while administrators can manage all sites from one Dashboard. When you run WordPress as a multi-site network, it adds an additional section to the Dashboard, for network-level management. All of the plugins we have created so far in this chapter present configuration panels at the site level, allowing for the custom configuration of options on a per-site basis. While this will be the desired behavior for most plugins, it might be preferable for some configuration elements to be set in a single place by a network-level administrator and apply to all the sites in the network.

In this recipe, you will learn how to modify our Google Analytics plugin to be configured at the network level when running on a multi-site installation and at the site level on regular WordPress configurations...