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)

Saving user-submitted content in custom post types

When visitors click on the Submit Review button on the form created in the previous recipe, the target of the form is set to be the page that is hosting the submission form. Since this page is not capable of handling form data, we must implement an action hook that intercepts this post data and sends it to a processing function that we will define before returning visitors to the submission form page.

Getting ready

You should be running the final version of the Chapter 4 - Book Reviews plugin created in Chapter 4, The Power of Custom Post Types, and should have already followed the Creating a client-side content submission form recipe. Alternatively, you can get the files from the book's GitHub page (ch4/ch4-book-reviews/ch4-book-reviews-v12.php and ch7/ch7-book-review-user-submission/ch7-book-review-user-submission-v1.php) and rename ch7-book-review-user-submission-v1.php to ch7-book-review-user-submission.php.

How to...