Yannick Lefebvre - WordPress Plugin Development Cookbook [2012, PDF/EPUB, ENG]

Preface

Chapter 1: Preparing a Local Development Environment
Introduction
Installing a web server on your computer
Downloading and configuring a local WordPress installation
Creating a local Subversion repository
Importing initial files to a local Subversion repository
Checking out files from a Subversion repository
Committing changes to a Subversion repository
Reverting uncommitted file changes
Viewing file history and reverting content changes to older revisions
Installing a dedicated code/text editor
Installing and configuring the NetBeans Integrated Development Environment
Interacting with a Subversion repository from the NetBeans interface
Managing a MySQL database server from the NetBeans interface

Chapter 2: Plugin Framework Basics
Introduction
Creating a plugin file and header
Adding output content to page headers using plugin actions
Using WordPress path utility functions to load external files and images
Modifying the page title using plugin filters
Adding text after each item's content using plugin filters
Inserting link statistics tracking code in page body using plugin filters
Troubleshooting coding errors and printing variable content
Creating a new simple shortcode
Creating a new shortcode with parameters
Creating a new enclosing shortcode
Loading a stylesheet to format plugin output
Writing plugins using object-oriented PHP

Chapter 3: User Settings and Administration Pages
Introduction
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
Hiding items which users should not access from the default menu
Rendering the admin page contents 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 stylesheet data in user settings
Managing multiple sets of user settings from a single admin page

Chapter 4: The Power of Custom Post Types
Introduction
Creating a custom post type
Adding a new section to the custom post type editor
Displaying single custom post type items using custom templates
Creating an archive page for custom post types
Displaying custom post type data in shortcodes
Adding custom categories for custom post types
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
Updating page title to include custom post data using plugin filters

Chapter 5: Customizing Post and Page Editors
Introduction
Adding extra fields to the post editor using custom meta boxes
Displaying custom post data in theme templates
Hiding the Custom Field section in the post editor
Extending the post editor to allow users to upload files directly

Chapter 6: Accepting User Content Submissions
Introduction
Creating a client-side content submission form
Saving user-submitted content in custom post types
Sending e-mail notifications upon new submissions
Implementing a captcha on user forms

Chapter 7: Creating Custom MySQL Database Tables
Introduction
Creating new database tables
Deleting custom tables on plugin removal
Updating custom table structure on plugin upgrade
Displaying custom table data in an admin page
Inserting and updating records in custom tables
Deleting records from custom tables
Displaying custom database table data in shortcodes
Implementing a search function to retrieve custom table data
Importing data from a user file into custom tables

Chapter 8: Leveraging JavaScript, jQuery, and AJAX Scripts
Introduction
Safely loading jQuery onto WordPress web pages
Displaying a pop-up dialog using the built-in ThickBox plugin
Controlling pop-up dialog display using shortcodes
Displaying a calendar day selector using the Datepicker plugin
Adding tooltips to admin page form fields using the TipTip plugin
Using AJAX to dynamically update partial page contents

Chapter 9: Adding New Widgets to the WordPress Library
Introduction
Creating a new widget in WordPress
Displaying configuration options
Validating configuration options
Implementing the widget display function
Adding a custom dashboard widget

Chapter 10: Enabling Plugin Internationalization
Introduction
Changing the WordPress language configuration
Adapting default user settings for translation
Making admin page code ready for translation
Modifying shortcode output for translation
Translating text strings using Poedit
Loading a language file in the plugin initialization

Chapter 11: Distributing Your Plugin on wordpress.org
Introduction
Creating a readme file for your plugin
Applying for your plugin to be hosted on wordpress.org
Uploading your plugin using Subversion
Providing a plugin banner image

Index