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

Chapter 3. User Settings and Administration Pages

This chapter is focused on setting up pages that enable users to configure plugin settings. It covers the following topics:

  • Creating default user settings on plugin initialization
  • Storing user settings using arrays
  • Removing plugin data on deletion
  • Creating an administration page menu item in the settings menu
  • Creating a multi-level administration menu
  • Adding menu items leading to external pages
  • Hiding items that users should not access from the default menu
  • Rendering the admin page content using HTML
  • Processing and storing plugin configuration data
  • Displaying a confirmation message when options are saved
  • Adding custom help pages
  • Rendering the admin page contents using the Settings API
  • Accessing user settings from action and filter hooks
  • Formatting admin pages using meta boxes
  • Splitting admin code from the main plugin file to optimize site performance
  • Storing style sheet data in user settings
  • Managing multiple sets of user settings from a single admin page...