Outsourced IT Partner
Support · systems · strategy
© 2026
One person, one business — IT support here, websites at webology.online.
One person, one business — IT support here, websites at webology.online.
WordPress Concepts Reference
Complete Guide to WordPress Architecture & Development
Taxonomies
Built-in Taxonomies
Categories
Tags
Post Formats
Link Categories
Taxonomy Functions
register_taxonomy()
wp_get_post_terms()
wp_set_post_terms()
get_terms()
get_term()
wp_insert_term()
wp_update_term()
wp_delete_term()
Content Types
Built-in Post Types
Posts
Pages
Attachments
Nav Menu Items
Customizer Changesets
Revisions
Custom Post Types
register_post_type()
post_type_exists()
get_post_type_object()
get_post_types()
post_type_supports()
Post Status
publish
draft
pending
private
auto-draft
trash
Hooks System
Action Hooks
add_action()
remove_action()
do_action()
has_action()
remove_all_actions()
Filter Hooks
add_filter()
remove_filter()
apply_filters()
has_filter()
remove_all_filters()
Common Hook Points
init
plugins_loaded
after_setup_theme
template_redirect
wp_head
wp_footer
admin_init
wp_enqueue_scripts
User Management
User Roles
Administrator
Editor
Author
Contributor
Subscriber
Super Admin
Capabilities
publish_posts
edit_posts
delete_posts
manage_options
upload_files
moderate_comments
edit_users
install_plugins
User Functions
current_user_can()
wp_get_current_user()
is_user_logged_in()
add_role()
remove_role()
get_user_by()
Theme System
Template Hierarchy
index.php
home.php
front-page.php
single.php
page.php
archive.php
category.php
search.php
404.php
Template Parts
header.php
footer.php
sidebar.php
comments.php
functions.php
style.css
Theme Features
post-thumbnails
custom-logo
custom-header
custom-background
html5
post-formats
automatic-feed-links
title-tag
Plugin System
Plugin Lifecycle
register_activation_hook()
register_deactivation_hook()
register_uninstall_hook()
is_plugin_active()
get_plugin_data()
Plugin Structure
plugin-name.php
uninstall.php
readme.txt
/assets/
/includes/
/admin/
/public/
/languages/
Shortcodes
Built-in Shortcodes
[gallery]
[audio]
[video]
[caption]
[embed]
[playlist]
Shortcode Functions
add_shortcode()
remove_shortcode()
do_shortcode()
shortcode_exists()
shortcode_atts()
strip_shortcodes()
Database
Core Tables
wp_posts
wp_postmeta
wp_users
wp_usermeta
wp_comments
wp_commentmeta
wp_terms
wp_term_relationships
wp_options
Database Functions
$wpdb
$wpdb->prepare()
$wpdb->get_var()
$wpdb->get_row()
$wpdb->get_results()
$wpdb->insert()
$wpdb->update()
$wpdb->delete()
REST API
Default Endpoints
/wp/v2/posts
/wp/v2/pages
/wp/v2/users
/wp/v2/comments
/wp/v2/categories
/wp/v2/tags
/wp/v2/media
REST API Functions
register_rest_route()
register_rest_field()
WP_REST_Response
WP_REST_Request
rest_ensure_response()
Widgets
Built-in Widgets
Recent Posts
Recent Comments
Archives
Categories
Tag Cloud
Calendar
Search
Custom HTML
Widget Functions
register_sidebar()
register_widget()
unregister_widget()
dynamic_sidebar()
is_active_sidebar()
Customizer
Customizer Components
Sections
Panels
Settings
Controls
Transport
Customizer Functions
add_panel()
add_section()
add_setting()
add_control()
get_theme_mod()
set_theme_mod()
