Pro WordPress Theme Development by Onishi, Adam -- Read -- Imperial Library of Trantor

Index

Title Copyright Dedication Contents at a Glance Contents About the Author About the Technical Reviewer Acknowledgments Introduction Chapter 1: Getting Started

An Introduction to WordPress

Community The Codex

WordPress Themes

Default Themes

WordPress in the near future

Features as Plugins The next default theme Twenty Fourteen

Themes from Scratch versus Premade PHP in WordPress

Functions Objects and Classes Alternate Syntax for Control Structures Coding Standards

Debugging WordPress Summary

Chapter 2: Theme Anatomy and Template Hierarchy

The Bare Minimum

The index.php File The style.css File

Basic Template Files

header.php footer.php sidebar.php comments.php searchform.php Including Basic Template Files

Functions File Template Hierarchy

page.php single.php archive.php front-page.php home.php search.php 404.php Custom Template Files

Post Formats

Template Parts

More Theme Setup

Theme Folder Structure Loading Styles and Scripts Conditional Tags Find Out Which Template Is Being Used

Building Your Theme, Part 1

Folder Structure Base Template Files Starter Templates

Summary

Chapter 3: Content Options and the Loop

WP_Query Constructing the Page

Get Query Parameters Decide on Template File

The Loop

have_posts the_post() Do You Need to “Loop” Every Time?

Custom and Dynamic Content with Queries

Methods of Querying in WordPress Modifying the Default Query Multiple Loops Advanced Queries Pagination with Custom Queries

Properties and Global Variables

WP_Query Properties Globals

Template Tags

Template Tag Varieties Template Tags and the Loop Display, Return, or Both Passing Tag Parameters

Using body_class( ) and post_class( )

More Useful Classes with Hooks Styling Sticky Posts A Note on HTML IDs

Building Your Theme, Part 2

Content First Adding Code to Your Templates

Summary

Chapter 4: Using Custom Post Types

Everything Is a Post When Do I Need a Custom Post Type?

What Is a Custom Post Type Used for?

Creating Custom Post Types

Naming Conventions Using a Plugin or the Theme Functions File Setting a Basic Custom Post Type Full Setup and Advanced Options for Custom Post Types Customizing the Admin Interfaces Plugins and Code Generators

Displaying Custom Post Types

Querying with Custom Post Types Custom Post Type Templates

Extending Post Types

Post Type Supports Customizing the Post Type Overview Screen Add Post Types to Feed

Building Your Theme, Part 3

Adding Custom Post Types Post Type Templates Content

Summary

Chapter 5: Creating Custom Taxonomies and Fields

Introducing Taxonomies

When Do I Need a Custom Taxonomy?

Creating Custom Taxonomies

Naming Conventions Setting Up a Basic Custom Taxonomy Full Setup of a Custom Taxonomy Contextual Help and Help Tabs

Displaying Posts by Custom Taxonomy

The tax_query Parameter Custom Taxonomy Templates

Displaying Custom Taxonomy Information

Listing All Taxonomy Terms Terms by Post

Introducing Custom Fields Custom Field Functions

add_post_meta update_post_meta delete_post_meta get_post_meta

Custom Metaboxes

add_meta_box Initializing the Metabox Adding Content to the Metabox Saving Metabox Data Conditional Display of Custom Metaboxes

Building Queries with Custom Fields Adding Custom Fields to the Feed Creating an Advanced Search Form with Custom Taxonomies and Custom Fields

Taxonomy Drop-Down Input Building the Search Form Setting Up the Search Query

Building Your Theme, Part 4

Adding Custom Taxonomies Adding Custom Metaboxes Setting Up the Menu Page Displaying the Featured Menu Item

Summary

Chapter 6: Customize with Hooks, Shortcodes, and Widgets

Hooks

Why Actions Are Not Filters When Do Actions and Filters Happen? Using Hooks Creating Custom Action Hooks Creating Custom Filter Hooks Debugging Hooks

Shortcodes

Creating Custom Shortcodes Multiple Shortcodes with the Same Function Making Shortcodes More User-Friendly

Widgets (and Dynamic Sidebars)

Dynamic Sidebars Creating Custom Widgets

Building Your Theme, Part 5

Adding shortcodes Adding Widgets to Your Theme Spring Cleaning the functions File

Summary

Chapter 7: Theme Options and the Theme Customizer

Why Provide Theme Options?

Choosing the Right Options

Simple Customizations with Theme Features

Custom Backgrounds Custom Headers

Saying Goodbye to Theme Options Pages Introducing the Theme Customizer Getting Started with the Theme Customizer

Adding Options to the Customizer Using Settings in Your Theme

How Theme Settings Are Stored

Theme Mods Options Creating an Options Array

Data Sanitization in Theme Options

Creating Your Own Sanitization Functions

Automatically Update the Theme Customizer

Adding Live Preview to Default Options

Adding Custom Controls

Adding a Color Palette Selector

Building Your Theme, Part 6

Adding a Logo Option Adding a Featured Post Option Adding a Color Palette Option

Summary

Chapter 8: Users, Roles, and Capabilities

User System

Roles Capabilities

Customizing Roles and Capabilities

How Roles and Capabilities Are Stored The WP_Roles Class WP_User Class Custom User Capabilities

Customizing User Login

Customizing the Login Page Creating a Custom User Login Page Creating User-Only Content Areas

Managing Users and User Data

Creating Users Updating and Deleting Users Creating Custom User Data

Building Your Theme, Part 7 Summary

Chapter 9: Plugins: When the Time Is Right

Plugins Bring Power, but Can Also Facilitate Evil Is a Plugin the Right Option?

Create a Plugin or Use the Theme Functions File? Avoid Rewriting WordPress Core Functionality Try to Avoid Plugins Forming the Core Functionality of Your Theme Managing Your Theme or Selling/Distributing?

Making Your Theme Compatible with Plugins How to Select a Plugin

A Note on Testing WordPress Plugin Directory Check the Details Support and Documentation Compatibility with Other Plugins Look at the Competition

Useful Plugins

Site Management Plugins Form Management Plugins SEO Plugins Extra Feature Plugins

Summary

Chapter 10: Security and Performance

Security

Backing Up WordPress Theme Security Securing the WordPress Login General WordPress Security General Security Monitoring Security

Performance

Testing Performance How Much Do You Need to Optimize? KISS: Do the Simple Things that Make the Most Difference Caching

Summary

Chapter 11: Distributing Your Theme

Before You Begin

Target Audience Competition What Features to Add Theme Options and Customizations Building Your Theme

Marketing

Building a Customer-Base Creating a Marketing Web Site Marketing Through Pricing Tracking Metrics

Theme Testing

Theme Review Process Testing Your Theme Testing with a Fresh Perspective

Distributing Your Theme

Licensing Your Theme Adding Your Theme to the Themes Directory Selling Your Theme

Supporting Your Theme

Ways of Providing Support Preventing Support Requests

Summary

Chapter 12: Extending Your Theme

Child Themes

Why Work with Child Themes? When to Use a Child Theme Creating a Child Theme Child Themes Summary

WordPress Comments

Comments: An Overview Working with Comments Comments Template Comments Form Comments List Comments Summary

Internationalization

How i18n Works in WordPress Readying Text for Translation Generating Translation Files Internationalization Summary

Summary

Chapter 13: Plugin Development

Writing Your First Plugin

Plugin Names Plugin Location and File Structure Plugin File Header How to Add Functionality

Encapsulating a Plugin in a Class

Actions and Filters from Within a Class Template Tags from Within a Class

Dealing with Data

Creating a Table Adding, Moving, and Updating Data Querying the Data

Initializing and Cleaning Up Admin Settings Pages

Adding Menu Pages Settings API Settings Link in the Plugins Management Page

Adding to the Plugin Repository

Preparing a Plugin Submitting to the Repository Updating a Plugin

Summary

Chapter 14: WordPress Multisite

When to Use Multisite

Advantages Disadvantages When Not to Use Multisite

Installing and Configuring Multisite

Prerequisites Enabling Multisite Enabling Multisite Creating a New Site Domain Mapping Uninstalling Multisite

Users in Multisite

Super Admins and Site Admins Managing Users in Multisite General Implications of Multisite Users

Theme Development for Multisite

Multisite Stats and Information Accessing Content Across the Network Extending Your Themes for Multisite

Plugins with Multisite

Must-Use Plugins Useful Plugins for Multisite

Summary

Index

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