WordPress Web Application Development - Second Edition电子书

WordPress Web Application Development Second Edition

Table of Contents

WordPress Web Application Development Second Edition

Credits

About the Author

About the Reviewers

www.PacktPub.com

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Why subscribe?

Free access for Packt account holders

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Downloading the color images of this book

Errata

Piracy

Questions

1. WordPress as a Web Application Framework

WordPress as a CMS

WordPress as a web application framework

The MVC versus event-driven architecture

Simplifying development with built-in features

User management

Media management

Template management

Database management

Routing

XMR-RPC API

Caching

Scheduling

Plugins and widgets

Themes

Actions and filters

The admin dashboard

Identifying the components of WordPress

The role of WordPress themes

Structure of a WordPress page layout

Customizing the application layout

The role of the admin dashboard

The admin dashboard

Posts and pages

Users

Appearance

Settings

The role of plugins

The role of widgets

A development plan for the portfolio management application

Application goals and target audience

Planning the application

User roles of the application

Planning application features and functions

Understanding limitations and sticking to guidelines

Building a question-answer interface

Prerequisites for building a question-answer interface

Creating questions

Customizing the comments template

Changing the status of answers

Saving the status of answers

Generating a question list

Enhancing features of the questions plugin

Customizing the design of questions

Categorizing questions

Approving and rejecting questions

Adding star rating to answers

Summary

2. Implementing Membership Roles, Permissions, and Features

Introduction to user management

Preparing the plugin

Getting started with user roles

Creating application user roles

The best action for adding user roles

Knowing the default roles of WordPress

Choosing among default and custom roles

Scenario 1

Scenario 2

Removing existing user roles

Understanding user capabilities

Creating your first capability

Understanding default capabilities

Registering application users

Implementing frontend registration

Shortcode implementation

Pros and cons of using shortcodes

Page template implementation

Pros and cons of page templates

Custom template implementation

Building a simple router for a user module

Creating the routing rules

Adding query variables

Flushing the rewriting rules

Controlling access to your functions

The advantages of using the do_action function

Creating custom templates

Designing the registration form

Planning the registration process

Handling registration form submission

Exploring the registration success path

Automatically log in the user after registration

Activating system users

Creating a login form in the frontend

Displaying the login form

Checking whether we implemented the process properly

Time to practice

Summary

3. Planning and Customizing the Core Database

Understanding the WordPress database

Exploring the role of existing tables

User-related tables

Post-related tables

Term-related tables

Other tables

Adapting existing tables into web applications

User-related tables

Post-related tables

Scenario 1 – An online shopping cart

Scenario 2 – A hotel reservation system

Scenario 3 – The project management application

Term-related tables

Other tables

Extending the database with custom tables

Planning the portfolio application tables

Types of tables in web applications

Creating custom tables

Querying the database

Querying the existing tables

Inserting records

Updating records

Deleting records

Selecting records

Querying the custom tables

Working with posts

Extending the WP_Query class for applications

Introduction to WordPress query classes

The WP_User_Query class

The WP_Comment_Query class

Other query classes

Limitations and considerations

Transaction support

Post revisions

How to know whether to enable or disable revisions?

Auto saving

Using meta tables

Summary

4. Building Blocks of Web Applications

Introduction to custom content types

The role of custom post types in web applications

Planning custom post types for application

Projects

Services

Articles

Books

Implementing custom post types for a portfolio application

Implementing the custom post type settings

Creating the project class

Assigning permissions to projects

Creating custom taxonomies for technologies and project types

Assigning permissions to the project type

Introduction to custom fields with meta boxes

What is a template engine?

Building a simple custom template loader

Creating your first template

Comparing the template loader and template engine

Persisting custom field data

Customizing custom post type messages

Introducing custom post type relationships

Pods framework for custom content types

Should you choose Pods for web development?

Time to practice

Summary

5. Developing Pluggable Modules

A brief introduction to WordPress plugins

Understanding the WordPress plugin architecture

WordPress plugins for web development

Creating reusable libraries with plugins

Planning the template loader plugin

Using the template loader plugin

Handling plugin dependencies

Extensible plugins

Extend plugins with WordPress core actions and filters

Planning a file uploader for portfolio application

Creating the extensible file uploader plugin

Converting file fields with jQuery

Integrating the media uploader to buttons

Extending the file uploader plugin

Customize the allowed types of images

Saving and loading project screens

Extend plugins with custom actions and filters

Pluggable plugins

Tips for using pluggable functions

Time to practice

Summary

6. Customizing the Dashboard for Powerful Backends

Understanding the admin dashboard

Customizing the admin toolbar

Removing the admin toolbar

Managing the admin toolbar items

Customizing the main navigation menu

Creating new menu items

Adding features with custom pages

Building options pages

Creating a custom layout for options pages

Building an application options panel

Using the WordPress options API

Using feature-packed admin list tables

Working with default admin list tables

The post list

Creating custom actions for custom posts

Creating custom filters for custom post types

Creating custom post status links

Displaying custom list columns

The user list

The comments list

Building extended lists

Using the admin list table for the following developers

Step 1 – defining the custom class

Step 2 – defining the instance variables

Step 3 – creating the initial configurations

Step 4 – implementing the custom column handlers

Step 5 – implementing the column default handlers

Step 6 – displaying the checkbox for records

Step 7 – listing the available custom columns

Step 8 – defining the sortable columns of list

Step 9 – creating a list of bulk actions

Step 10 – retrieving list data

Step 11 – adding a custom list as a menu page

Step 12 – displaying the generated list

An awesome visual presentation for admin screens

Using existing themes

Using plugin-based third-party admin themes

Creating your own admin theme

The responsive nature of the admin dashboard

Time for action

Summary

7. Adjusting Theme for Amazing Frontends

An introduction to the WordPress application frontend

A basic file structure of the WordPress theme

Understanding the template execution hierarchy

The template execution process of web application frameworks

Web application layout creation techniques

Shortcodes and page templates

Custom templates with custom routing

Using pure PHP templates

The WordPress way of using templates

Direct template inclusion

Theme versus plugin-based templates

Are you planning to create an application-specific theme?

Building the portfolio application home page

What is a widget?

Widgetizing application layouts

Creating widgets

Designing a home page template

Generating the application frontend menu

Creating a navigation menu

Displaying user-specific menus on the frontend

Managing options and widgets with customizer

Adding custom options to the theme customizer

Handling widgets in the theme customizer

Creating pluggable templates

Pluggable templates in WordPress

Extending the home page template with action hooks

Customize widgets to enable extendable locations

Planning action hooks for layouts

Time for action

Summary

8. Enhancing the Power of Open Source Libraries and Plugins

Why choose open source libraries?

Open source libraries inside the WordPress core

Open source JavaScript libraries in the WordPress core

What is Backbone.js?

Understanding the importance of code structuring

Integrating Backbone.js and Underscore.js

Creating a developer profile page with Backbone.js

Structuring with Backbone.js and Underscore.js

Displaying the projects list on page load

Creating new projects from the frontend

Integrating events to Backbone.js views

Validating and creating new models for the server

Creating new models in the server

Using PHPMailer for custom e-mail sending

Usage of PHPMailer within the WordPress core

Creating a custom version of a pluggable wp_mail function

Loading PHPMailer inside plugins and creating custom functions

Implementing user authentication with OpenAuth

Configuring login strategies

Implementing LinkedIn account authentication

Verifying LinkedIn account and generating response

Building a LinkedIn app

The process of requesting the strategies

Initializing the library

Authenticating users to our application

Using third- party libraries and plugins

Time for action

Summary

9. Listening to Third-party Applications

Introduction to APIs

The advantages of having an API

The WordPress XML-RPC API for web applications

Building the API client

Creating a custom API

Integrating API user authentication

Integrating API access tokens

Providing the API documentation

Time for action

Summary

10. Integrating and Finalizing the Portfolio Management Application

Integrating and structuring the portfolio application

Adding the template loader dependencies

Interating the template loader into a user manager

Working with a restructured application

Building the developer model

Designing the developer list template

Enabling AJAX-based filtering

Updating a user profile with additional fields

Updating the values of the profile fields

Scheduling subscriber notifications

Notifying subscribers through e-mails

Time for action

Final thoughts

Summary

11. Supplementary Modules for Web Development

Internationalization

Introduction to WordPress translation support

The translation functions in WordPress

Creating plugin translations

Creating the POT file using PoEdit

Loading language files

Changing the WordPress language

Working with media grid and image editor

Introduction to the post editor

Using the WordPress editor

Video embedding

Lesser-known WordPress features

Caching

Transients

Testing

Security

Introduction to multisite

Time for action

Summary

A. Configurations, Tools, and Resources

Configure and set up WordPress

Step 1 – downloading WordPress

Step 2 – creating the application folder

Step 3 – configuring the application URL

Creating a virtual host

Using a localhost

Step 4 – installing WordPress

Step 5 – setting up permalinks

Step 6 – downloading the Responsive theme

Step 7 – activating the Responsive theme

Step 8 – activating the plugin

Step 9 – using the application

Open source libraries and plugins

Online resources and tutorials

Index