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)

Using AJAX to dynamically update partial page contents

When WordPress users create complex sites with lots of dynamic content, such as Twitter widgets or other third-party embedded components, navigation can become a grueling experience for visitors. This happens since the browser needs to refresh all page elements and fetch external data every time a user interacts with the website.

In such situations, using Asynchronous JavaScript and XML (AJAX) can greatly accelerate user navigation by displaying subsets of data and dynamically retrieving updates for isolated sections on request. More specifically, AJAX allows the browser to send requests to a web server and insert an HTML content response back in the web page, replacing or augmenting the original content.

Getting ready

You should have already followed the Displaying custom post type data in shortcodes recipe in Chapter 4, The Power of Custom Post Types, to have a starting point for this recipe. Alternatively, you can get...