WordPress Plugin Development Cookbook - Second Edition

Learn to create plugins for WordPress 4.x to deliver custom projects or share with the community through detailed step-by-step recipes and code examplesAbout This Book* Learn how to change and extend WordPress to perform virtually any task* Explore the plugin API through approachable examples and detailed explanations* Mold WordPress to your project's needs or transform it to benefit the entire communityWho This Book Is ForIf you are a WordPress user, developer, or a site integrator with basic knowledge of PHP and an interest to create new plugins to address your personal needs, client needs, or share with the community, then this book is for you. What You Will Learn* Discover how to register user callbacks with WordPress, forming the basis of plugin creation* Explore the creation of administration pages and adding new content management sections through custom post types and custom database tables* Improve your plugins by customizing the post and page editors, categories and user profiles, and creating visitor-facing forms* Make your pages dynamic using Javascript, AJAX and adding new widgets to the platform* Learn how to add support for plugin translation and distribute your work to the WordPress communityIn DetailWordPress 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. Style and approachThis cookbook will take you through the creation of your first simple plugin to adding entirely new sections and widgets in the administration interface, so you can learn how to change and extend WordPress to perform virtually any task. Each topic is illustrated through realistic examples showing how to solve common problems, followed by detailed explanations of all concepts used.

Creating default user settings on plugin initialization.

Cover ; Copyright ; Credits; About the Author; About the Reviewers; www.PacktPub.com; Customer Feedback; Table of Contents; Preface; Chapter 1: Preparing a Local Development Environment ; Introduction; Installing a web server on your computer; How to do it ... ; How it works ... ; There's more ... ; Creating a remote web development environment; See also; Downloading and configuring a local WordPress installation; Getting ready; How to do it ... ; How it works ... ; Creating a local Subversion repository; How to do it ... ; How it works ... ; There's more ... ; Manual repository creation.

Other version control systemsSee also; Importing initial files to a local Subversion repository; Getting ready; How to do it ... ; How it works ... ; See also; Checking out files from a Subversion repository; Getting ready; How to do it ... ; How it works ... ; There's more ... ; Subversion file statuses; See also; Committing changes to a Subversion repository; Getting ready; How to do it ... ; How it works ... ; There's more ... ; Viewing the differences in modified files; Updating files to latest repository version; Reverting uncommitted file changes; Viewing file history.

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