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)

Storing user settings using arrays

While the previous recipe worked quite well in creating entries in the site's options table for each individual plugin option, another way to manage user settings is to store them as arrays in the database.

This recipe creates the same option as the previous one, but also adds a second option indicating whether outgoing links should be tracked. It uses an array instead of individual options to store these settings. It also incorporates an upgrade strategy to deal with the creation of additional options as a plugin evolves over time.

Getting ready

You should have already followed the recipe entitled Inserting link tracking code in the page body using plugin filters in Chapter 2, Plugin Framework Basics, to have a starting point for this recipe. Alternatively, you can get the resulting code (ch2/ch2-page-header-output/ch2-page-header-output-v2.php) from the book's GitHub page and rename the file ch2-page-header-output.php.