WordPress Plugin Development Table of Contents

Table of Contents

• Preface

• Chapter 1: Preparing for WordPress Development
• How will you benefit?
• WordPress features
• More sites means more opportunities
• Big players use it
• Urgent response to security issues
• Flexibility
• Search engines friendly
• Easy to use
• Social aspect
• Plugins as tool for promotion
• Dogfooding WordPress plugins
• Challenges involved
• Development
• Security
• Work after development
• Localization
• Documentation
• Support
• Promotion
• Plugins developed in this book
• Digg This
• Live Blogroll
• The Wall
• Snazzy Archives
• Insights
• Post Types
• Development Goodies
• Tools for the job
• WordPress
• Text editor
• FTP client
• Web browser
• Firebug
• Ubiquity
• Screengrab
• IE tab
• Final notes
• Installing and managing plugins
• Searching documentation
• Summary

• Chapter 2: Social Bookmarking
• Plugging in your first plugin
• Time for action – Create your first plugin
• The plugin information header
• Checking WordPress versions
• Checking the plugin
• Time for Action – Testing the version check

• Displaying a Digg button
• Time for Action – Implement a Digg link

• Using the Digg API
• Acquiring post information
• Post permalink URL

• Editing the theme files

• WordPress plugin hooks
• Time for Action – Use a filter hook

• WordPress hooks
• Filter hooks
• Action hooks
• Practical filters and actions examples

• Adding a Digg button using JavaScript code
• Time for Action – Implement a Digg button

• Conditional Tags

• Styling the output
• Time for Action – Use CSS to position the button

• Summary

• Chapter 3: Live Blogroll
• Starting up with the blogroll
• Time for action – Roll into the blogroll
• RSS Feed Processing

• jQuery JavaScript library
• Implementing a mouse hover event in jQuery
• Time for action – Creating a hover event with jQuery
• JavaScript and WordPress
• Initializing jQuery
• Expanding jQuery knowledge
• Creating the pop-up with CSS
• Time for action – Apply CSS to the popup

• Demystifying Ajax
• Simple example of using Ajax
• Time for action – Use Ajax to dynamically retrieve feed posts
• Using JavaScript with WordPress
• Parsing parameters using wp_localize_script
• Ajax and WordPress
• Ajax in admin panel
• jQuery.ajax method
• Time for action – Use advanced Ajax call
• Ajax script security using nonces
• Time for action – Add a security nonce

• Summary

• Chapter 4: The Wall
• The main concepts behind the Wall plugin
• Creating a widget
• Time for action – Create a 'Hello World!' widget
• Register widgets with description

• Widget controls
• Time for action – Expanding the widget with controls

• WordPress options
• Display widget control
• Handling widget input
• Handling widget output

• Create a WordPress page from the code
• Time for action – Insert a page

• Handling user input
• Time for action – Create the wall comment form

• Managing Ajax comment submit
• Time for action – Save the comments

• Using Ajax to submit forms
• Saving comments in WordPress post

• Dynamically load comments
• Time for action – Display the comments

• WordPress database query
• Comment output
• Displaying the comments

• Ajax security
• Time for action – Display the comments

• Summary

• Chapter 5: Snazzy Archives
• Using a class for plugin
• Time for action – Create a new plugin class

• Showing template output with shortcodes
• Time for action – Use a shortcode

• Shortcode API
• Enclosing shortcodes

• Custom templates
• Time for action – Create a custom template

• Prepare archives
• Time for action – Show archives of posts

• Get all posts from database
• Using a regular expression
• Retrieve comment count for a post
• Using output buffers

• Apply styling and jQuery to archives
• Time for action – Style the archive view
• Time for action – Use jQuery to allow user interaction

• Creating plugin options page
• Time for action – Create an options page

• Managing plugin options
• Handling options form
• Adding administration pages

• Use plugin options
• Time for action – Apply the plugin options

• Caching the plugin output
• Time for action – Create archives cache

• Summary

• Chapter 6: Insights for WordPress
• Creating custom panels in the editor screen
• Time for action – Create a new plugin outline
• Custom edit panels in WordPress

• Searching the posts
• Time for action – Display a list of matching posts

• Interacting with tinyMCE
• Time for action – Insert the link into tinyMCE

• Using Flickr API
• Time for action – Display Flickr photos

• Using third-party solutions—phpFlickr

• Creating a tinyMCE plugin
• Time for action – Adding a button to tinyMCE

• Create a functional tinyMCE plugin window
• Time for action – Open a tinyMCE window

• Summary

• Chapter 7: Post Types
• Handling localization
• Time for action – Create plugin and add localization
• Optimizing localization usage
• How does localization work?

• Adding a post template
• Time for action – Create 'add photo' post template

• Backend CSS classes

• Handling file and image uploads
• Time for action – Handle uploaded image

• Using custom fields
• Adding custom fields
• Retrieving custom fields

• Quick post a link
• Time for action – Add link template

• Tinkering with WordPress backend menus
• Time for action - Remove 'Link' from the Write page

• Programming the Manage panel
• Time for action – Add post type column in the Manage panel

• Modifying an existing column
• Manage screen search filter
• Time for action – Add a search filter box

• Handling error messages
• Time for action – Adding support for errors

• User roles and capabilities
• Time for action – Add user capability checks

• Summary

• Chapter 8: Development Goodies
• Creating Localization files
• Time for action - Create a POT file
• Updating POT file
• Time for action – Perform translation
• Updating translation

• Documentation and support
• Plugin readme file
• Time for action – Create a sample plugin readme.txt file
• Sections of readme.txt
• General information
• Special codes
• Screenshots
• Installation instructions
• Plugin homepage
• Providing support

• Code management and plugin repository
• Requesting repository access
• Using SVN
• Time for action - Manage a local repository using SVN
• Tagging a new version
• Using WordPress development SVN
• Local copy of plugin repository

• Promotion
• Plugin promotion checklist

• General plugin development guidelines
• Security
• Performance
• Re-using resources
• Keeping API up-to-date

• WordPress MU development
• WordPress and GPL
• Online resources
• WordPress documentation (WordPress Codex)
• WordPress development news
• WordPress blog
• WordPress development updates
• WordPress Trac
• WordPress dev IRC channel
• Debugging and testing
• Unit testing
• Automated tests
• Mailing Lists
• WP hackers
• WP professionals
• Other mailing lists
• Podcasts
• WordCast
• WordPress Weekly
• Author's (Vladimir Prelovac's) web site

• Summary

• Index