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)

Adapting default user settings for translation

Before we can create translation files for our own plugins, their code needs to be specifically written to allow text items to be translated. This work starts in the plugin's activation routine, where default plugin option values are set. By using translation functions, our code can search for alternate values when a language other than English is specified in the website's configuration file.

Getting ready

You should have already followed the Changing the WordPress site language configuration recipe to have configured a language other than English for your development site.

How to do it...

Follow these steps to assign a translated string to a plugin's default options array on initialization:

  1. Navigate to the WordPress plugins directory of your development installation.
  2. Create a new directory called ch12-hello-world.
  3. Navigate to the directory and create a text file called ch12-hello-world.php.
  4. ...