Book Image

WordPress Plugin Development Cookbook - Third Edition

By : Yannick Lefebvre
Book Image

WordPress Plugin Development Cookbook - Third Edition

By: Yannick Lefebvre

Overview of this book

WordPress is one of the most widely used, powerful, and open content management systems (CMSs). Whether you're a site owner trying to find the right extension, a developer who wants to contribute to the community, or a website developer working to fulfill a client's needs, learning how to extend WordPress' capabilities will help you to unleash its full potential. This book will help you become familiar with API functions to create secure plugins with easy-to-use administration interfaces. This third edition contains new recipes and up-to-date code samples, including new chapters on creating custom blocks for the block editor and integrating data from external sources. From one chapter to the next, you’ll learn 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, followed by recipes covering how to design administration panels, enhance the post editor with custom fields, store custom data, and even create custom blocks. You'll safely incorporate dynamic elements into web pages using scripting languages, learn how to integrate data from external sources, 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 (15 chapters)

Adding Quick Edit fields for custom categories

A great feature of WordPress is the ability for site editors to quickly make changes to any post in the admin section by clicking on the Quick Edit link associated with any of the items shown. While our custom post type taxonomy appears in the Quick Edit section, it is not a drop-down list of choices, as we had in the book review editor to ensure that only a single type is selected. It would also be useful for the author and rating fields to appear in the Quick Edit section to be able to quickly make changes to these fields.

This recipe shows how to add custom fields when quickly editing book reviews. As you perform the following steps, you will see that some of the code that we put in place is not as cleanly written as code from previous recipes, since the WordPress Quick Edit customization infrastructure is not as well-formed as other areas of the platform and involves a mix of PHP and JavaScript.

Getting ready

You should have...