WordPress Plugin development cookbook : create powerful plugins to extend the world's most popular CMS / Yannick Lefebvre.

Format:

Book

Author/Creator:

Lefebvre, Yannick, author.

Language:

English

Subjects (All):

WordPress (Electronic resource).

Blogs--Computer programs.

Blogs.

Web sites--Authoring programs.

Web sites.

Physical Description:

1 online resource (1 volume) : illustrations

Edition:

Second edition.

Place of Publication:

Birmingham, [England] ; Mumbai, [India] : Packt, 2017.

System Details:

text file

Biography/History:

Lefebvre Yannick: Yannick Lefebvre is a plugin developer who has created multiple plugins on the official WordPress repository. His first creation, Link Library, is used on thousands of sites worldwide. With a background in computer science, he wrote his first plugin in 2004 and quickly started sharing his creations with the community. He is actively involved in the Montreal WordPress community, has presented multiple times at WordCamp Montreal, and offers custom plugin development services. By day, Yannick works for CM Labs Simulations, a company providing software tools and simulators for vehicles and heavy equipment.

Summary:

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 examples About 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 community Who This Book Is For If 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 community In Detail 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 bo...

Contents:

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

Creating a local Subversion repository

Manual repository creation

Other version control systems

Importing initial files to a local Subversion repository

Checking out files from a Subversion repository

Subversion file statuses

Committing changes to a Subversion repository

Viewing the differences in modified files

Updating files to latest repository version

Reverting uncommitted file changes

Viewing file history

Installing a dedicated code editor/text editor

Chapter 2: Plugin Framework Basics

Creating a plugin file and header

Adding output content to page headers using plugin actions

Action hooks online listings

Searching for hooks in the WordPress source code

Using WordPress path utility functions to load external files and images

See also.

Modifying the site generator meta tag using plugin filters

preg_replace function

Filter hooks online listings and the apply_filters function

Adding text after each item's content using plugin filters

get_the_title and get_permalink functions

Inserting link statistics tracking code in page body using plugin filters

Troubleshooting coding errors and printing variable content

Built-in WordPress debugging features

Creating a new simple shortcode

Creating a new shortcode with parameters

Creating a new enclosing shortcode

Loading a style sheet to format plugin output

Writing plugins using object-oriented PHP

Chapter 3: User Settings and Administration Pages

Creating default user settings on plugin initialization

Deactivation function

Storing user settings using arrays

Removing plugin data on deletion

Creating an administration page menu item in the settings menu

Settings hook priority to determine menu order

Creating a multi-level administration menu.

How to do it...

Adding menu items leading to external pages

Hiding items which users should not access from the default menu

Rendering the admin page contents using HTML

wp_nonce_field

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

Rendering a drop-down list settings field

Rendering a text area settings field

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

Creating network-level admin pages

Chapter 4: The Power of Custom Post Types

Creating a custom post type

There's more.

Changing the custom post type permalinks slug

Adding a new section to the custom post type editor

Displaying single custom post type items using a custom layout

Displaying custom post type data in shortcodes

do_shortcode function

Adding custom categories for custom post types

Adding custom fields to categories

Hiding the category editor from the custom post type editor

Displaying additional columns in the custom post list page

Adding filters for custom categories to the custom post list page

Adding Quick Edit fields for custom categories

Updating page title to include custom post data using plugin filters

Chapter 5: Customizing Post and Page Editors

Capturing and displaying information using custom meta boxes

Adding a new meta box to all post types (including custom ones)

Displaying custom post data using filter functions

Hiding the Custom Field section in the post editor

Extending the post editor to allow users to upload files directly.

Getting ready

Chapter 6: Accepting User Content Submissions

Creating a client-side content submission form

Saving user-submitted content in custom post types

Moderating user-submitted content

Sending email notifications upon new submissions

Implementing a CAPTCHA on user forms using an online service

Using a local library to implement a CAPTCHA on user forms

Chapter 7: Customizing User Data

Adding custom fields to the user editor

Processing and storing user custom data

Displaying new user data in user list page

Using custom user data in containing shortcode

Chapter 8: Creating Custom MySQL Database Tables

Creating new database tables

Using phpMyAdmin to simplify code creation

Create tables in network installation

Deleting custom tables on plugin removal

Updating custom table structure on plugin upgrade

Displaying custom table data on an admin page

How to do it.

How it works.

Notes:

Includes index.

Description based on online resource; title from PDF title page (ebrary, viewed August 21, 2017).

OCLC:

1001253552