Hook load order by activity

Choose an activity from this list to display the load order of all WordPress’ action hooks (bluish) and filters (gray) when performing the activity. Click each hook name to view documentation.

Please note:

Duplicate calls are omitted, no matter when they appear in the load order. This list only indicates the first instance of each hook from the same file & line number. Some filters, particularly formatting ones like sanitize_key, are called many times throughout the load order. Since each is listed only once, some may look as if they can’t be hooked by plugins or themes, but that’s misleading.
List was generated using WordPress 4.1 (single-site).
List was generated using a fairly standard blog theme, which implements sidebars on each page.
Calls from script files within theme and plugin directories are omitted.
No distinction is made for variable hook names, e.g. ‘option_siteurl’ is listed but is documented as a variable filter ‘option_{option_name}.’

Logged-in user (admin) logs out*

(*Occurs over multiple page loads; hooks are repeated upon each load)

Legend: (m,p, and t) indicate the sequence has passed certain milestones: (m) indicates must-use plugins are available / can hook; (p) indicates plugins and (t) themes.

incompatible_sql_modes (wp-includes/wp-db.php)
query (wp-includes/wp-db.php)
pre_option_siteurl (wp-includes/option.php)
option_siteurl (wp-includes/option.php)
muplugins_loaded (m) (wp-settings.php)
pre_site_option_siteurl (m) (wp-includes/option.php)
default_site_option_siteurl (m) (wp-includes/option.php)
site_option_siteurl (m) (wp-includes/option.php)
pre_option_home (m) (wp-includes/option.php)
option_home (m) (wp-includes/option.php)
gettext_with_context (m) (wp-includes/l10n.php)
gettext (m) (wp-includes/l10n.php)
registered_taxonomy (m) (wp-includes/taxonomy.php)
sanitize_key (m) (wp-includes/formatting.php)
post_type_labels_post (m) (wp-includes/post.php)
registered_post_type (m) (wp-includes/post.php)
post_type_labels_page (m) (wp-includes/post.php)
post_type_labels_attachment (m) (wp-includes/post.php)
post_type_labels_revision (m) (wp-includes/post.php)
post_type_labels_nav_menu_item (m) (wp-includes/post.php)
theme_root (m) (wp-includes/theme.php)
pre_option_active_plugins (m,p) (wp-includes/option.php)
option_active_plugins (m,p) (wp-includes/option.php)
pre_option_hack_file (m,p) (wp-includes/option.php)
option_hack_file (m,p) (wp-includes/option.php)
pre_option_blog_charset (m,p) (wp-includes/option.php)
option_blog_charset (m,p) (wp-includes/option.php)
plugins_loaded (m,p) (wp-settings.php)
load_default_widgets (m,p) (wp-includes/functions.php)
load_default_embeds (m,p) (wp-includes/media.php)
wp_audio_extensions (m,p) (wp-includes/media.php)
wp_audio_embed_handler (m,p) (wp-includes/media.php)
wp_video_extensions (m,p) (wp-includes/media.php)
wp_video_embed_handler (m,p) (wp-includes/media.php)
sanitize_comment_cookies (m,p) (wp-settings.php)
pre_option_permalink_structure (m,p) (wp-includes/option.php)
option_permalink_structure (m,p) (wp-includes/option.php)
pre_option_wpcm_user_roles (m,p) (wp-includes/option.php)
option_wpcm_user_roles (m,p) (wp-includes/option.php)
setup_theme (m,p) (wp-settings.php)
pre_option_template (m,p,t) (wp-includes/option.php)
option_template (m,p,t) (wp-includes/option.php)
template (m,p,t) (wp-includes/theme.php)
template_directory (m,p,t) (wp-includes/theme.php)
pre_option_stylesheet (m,p,t) (wp-includes/option.php)
option_stylesheet (m,p,t) (wp-includes/option.php)
stylesheet (m,p,t) (wp-includes/theme.php)
stylesheet_directory (m,p,t) (wp-includes/theme.php)
pre_option_WPLANG (m,p,t) (wp-includes/option.php)
option_WPLANG (m,p,t) (wp-includes/option.php)
locale (m,p,t) (wp-includes/l10n.php)
override_unload_textdomain (m,p,t) (wp-includes/l10n.php)
unload_textdomain (m,p,t) (wp-includes/l10n.php)
override_load_textdomain (m,p,t) (wp-includes/l10n.php)
load_textdomain (m,p,t) (wp-includes/l10n.php)
load_textdomain_mofile (m,p,t) (wp-includes/l10n.php)
locale (m,p,t) (wp-includes/l10n.php)
wp_cache_themes_persistently (m,p,t) (wp-includes/class-wp-theme.php)
extra_theme_headers (m,p,t) (wp-includes/functions.php)
pre_option_sds_theme_options (m,p,t) (wp-includes/option.php)
option_sds_theme_options (m,p,t) (wp-includes/option.php)
determine_current_user (m,p,t) (wp-includes/pluggable.php)
auth_cookie_malformed (m,p,t) (wp-includes/pluggable.php)
sanitize_user (m,p,t) (wp-includes/formatting.php)
get_user_metadata (m,p,t) (wp-includes/meta.php)
pre_site_option_logged_in_key (m,p,t) (wp-includes/option.php)
default_site_option_logged_in_key (m,p,t) (wp-includes/option.php)
pre_option_logged_in_key (m,p,t) (wp-includes/option.php)
option_logged_in_key (m,p,t) (wp-includes/option.php)
site_option_logged_in_key (m,p,t) (wp-includes/option.php)
pre_site_option_logged_in_salt (m,p,t) (wp-includes/option.php)
default_site_option_logged_in_salt (m,p,t) (wp-includes/option.php)
pre_option_logged_in_salt (m,p,t) (wp-includes/option.php)
option_logged_in_salt (m,p,t) (wp-includes/option.php)
site_option_logged_in_salt (m,p,t) (wp-includes/option.php)
salt (m,p,t) (wp-includes/pluggable.php)
session_token_manager (m,p,t) (wp-includes/session.php)
auth_cookie_valid (m,p,t) (wp-includes/pluggable.php)
set_current_user (m,p,t) (wp-includes/pluggable.php)
map_meta_cap (m,p,t) (wp-includes/capabilities.php)
user_has_cap (m,p,t) (wp-includes/capabilities.php)
after_setup_theme (m,p,t) (wp-settings.php)
theme_locale (m,p,t) (wp-includes/l10n.php)
init (m,p,t) (wp-settings.php)
post_format_rewrite_base (m,p,t) (wp-includes/taxonomy.php)
pre_option_category_base (m,p,t) (wp-includes/option.php)
option_category_base (m,p,t) (wp-includes/option.php)
pre_option_tag_base (m,p,t) (wp-includes/option.php)
option_tag_base (m,p,t) (wp-includes/option.php)
pre_option_link_manager_enabled (m,p,t) (wp-includes/option.php)
option_link_manager_enabled (m,p,t) (wp-includes/option.php)
pre_option_sidebars_widgets (m,p,t) (wp-includes/option.php)
option_sidebars_widgets (m,p,t) (wp-includes/option.php)
sidebars_widgets (m,p,t) (wp-includes/widgets.php)
widgets_init (m,p,t) (wp-includes/default-widgets.php)
register_sidebar (m,p,t) (wp-includes/widgets.php)
pre_option_widget_pages (m,p,t) (wp-includes/option.php)
default_option_widget_pages (m,p,t) (wp-includes/option.php)
wp_register_sidebar_widget (m,p,t) (wp-includes/widgets.php)
pre_option_widget_calendar (m,p,t) (wp-includes/option.php)
default_option_widget_calendar (m,p,t) (wp-includes/option.php)
pre_option_widget_archives (m,p,t) (wp-includes/option.php)
option_widget_archives (m,p,t) (wp-includes/option.php)
pre_option_widget_meta (m,p,t) (wp-includes/option.php)
option_widget_meta (m,p,t) (wp-includes/option.php)
pre_option_widget_search (m,p,t) (wp-includes/option.php)
option_widget_search (m,p,t) (wp-includes/option.php)
pre_option_widget_text (m,p,t) (wp-includes/option.php)
option_widget_text (m,p,t) (wp-includes/option.php)
pre_option_widget_categories (m,p,t) (wp-includes/option.php)
option_widget_categories (m,p,t) (wp-includes/option.php)
pre_option_widget_recent-posts (m,p,t) (wp-includes/option.php)
option_widget_recent-posts (m,p,t) (wp-includes/option.php)
pre_option_widget_recent-comments (m,p,t) (wp-includes/option.php)
option_widget_recent-comments (m,p,t) (wp-includes/option.php)
pre_option_widget_rss (m,p,t) (wp-includes/option.php)
option_widget_rss (m,p,t) (wp-includes/option.php)
pre_option_widget_tag_cloud (m,p,t) (wp-includes/option.php)
default_option_widget_tag_cloud (m,p,t) (wp-includes/option.php)
pre_option_widget_nav_menu (m,p,t) (wp-includes/option.php)
default_option_widget_nav_menu (m,p,t) (wp-includes/option.php)
pre_option_widget_sds-social-media-widget (m,p,t) (wp-includes/option.php)
default_option_widget_sds-social-media-widget (m,p,t) (wp-includes/option.php)
pre_option_widget_bdes_topix (m,p,t) (wp-includes/option.php)
option_widget_bdes_topix (m,p,t) (wp-includes/option.php)
pre_option_use_smilies (m,p,t) (wp-includes/option.php)
option_use_smilies (m,p,t) (wp-includes/option.php)
wp_spaces_regexp (m,p,t) (wp-includes/formatting.php)
plugin_locale (m,p,t) (wp-includes/l10n.php)
pre_option_syntaxhighlighter_settings (m,p,t) (wp-includes/option.php)
option_syntaxhighlighter_settings (m,p,t) (wp-includes/option.php)
set_url_scheme (m,p,t) (wp-includes/link-template.php)
plugins_url (m,p,t) (wp-includes/link-template.php)
wp_default_scripts (m,p,t) (wp-includes/class.wp-scripts.php)
site_url (m,p,t) (wp-includes/link-template.php)
attribute_escape (m,p,t) (wp-includes/formatting.php)
heartbeat_settings (m,p,t) (wp-includes/script-loader.php)
admin_url (m,p,t) (wp-includes/link-template.php)
nonce_life (m,p,t) (wp-includes/pluggable.php)
pre_site_option_nonce_key (m,p,t) (wp-includes/option.php)
default_site_option_nonce_key (m,p,t) (wp-includes/option.php)
pre_option_nonce_key (m,p,t) (wp-includes/option.php)
option_nonce_key (m,p,t) (wp-includes/option.php)
site_option_nonce_key (m,p,t) (wp-includes/option.php)
pre_site_option_nonce_salt (m,p,t) (wp-includes/option.php)
default_site_option_nonce_salt (m,p,t) (wp-includes/option.php)
pre_option_nonce_salt (m,p,t) (wp-includes/option.php)
option_nonce_salt (m,p,t) (wp-includes/option.php)
site_option_nonce_salt (m,p,t) (wp-includes/option.php)
wp_auth_check_interval (m,p,t) (wp-includes/script-loader.php)
includes_url (m,p,t) (wp-includes/link-template.php)
wp_default_styles (m,p,t) (wp-includes/class.wp-styles.php)
pre_option_cron (m,p,t) (wp-includes/option.php)
option_cron (m,p,t) (wp-includes/option.php)
post_type_labels_xcust_pt (m,p,t) (wp-includes/post.php)
wp_parse_str (m,p,t) (wp-includes/formatting.php)
pre_option_theme_switched (m,p,t) (wp-includes/option.php)
option_theme_switched (m,p,t) (wp-includes/option.php)
wp_loaded (m,p,t) (wp-settings.php)
nocache_headers (m,p,t) (wp-includes/functions.php)
pre_option_html_type (m,p,t) (wp-includes/option.php)
option_html_type (m,p,t) (wp-includes/option.php)
login_init (m,p,t) (wp-login.php)
login_form_logout (m,p,t) (wp-login.php)
home_url (m,p,t) (wp-includes/link-template.php)
allowed_redirect_hosts (m,p,t) (wp-includes/pluggable.php)
salt (m,p,t) (wp-includes/pluggable.php)
check_admin_referer (m,p,t) (wp-includes/pluggable.php)
sanitize_user_meta_session_tokens (m,p,t) (wp-includes/meta.php)
update_user_metadata (m,p,t) (wp-includes/meta.php)
update_user_meta (m,p,t) (wp-includes/meta.php)
updated_user_meta (m,p,t) (wp-includes/meta.php)
clear_auth_cookie (m,p,t) (wp-includes/pluggable.php)
wp_logout (m,p,t) (wp-includes/pluggable.php)
wp_redirect (m,p,t) (wp-includes/pluggable.php)
wp_redirect_status (m,p,t) (wp-includes/pluggable.php)
status_header (m,p,t) (wp-includes/functions.php)
shutdown (m,p,t) (wp-includes/load.php)
incompatible_sql_modes (wp-includes/wp-db.php)
query (wp-includes/wp-db.php)
pre_option_siteurl (wp-includes/option.php)
option_siteurl (wp-includes/option.php)
muplugins_loaded (m) (wp-settings.php)
pre_site_option_siteurl (m) (wp-includes/option.php)
default_site_option_siteurl (m) (wp-includes/option.php)
site_option_siteurl (m) (wp-includes/option.php)
pre_option_home (m) (wp-includes/option.php)
option_home (m) (wp-includes/option.php)
gettext_with_context (m) (wp-includes/l10n.php)
gettext (m) (wp-includes/l10n.php)
registered_taxonomy (m) (wp-includes/taxonomy.php)
sanitize_key (m) (wp-includes/formatting.php)
post_type_labels_post (m) (wp-includes/post.php)
registered_post_type (m) (wp-includes/post.php)
post_type_labels_page (m) (wp-includes/post.php)
post_type_labels_attachment (m) (wp-includes/post.php)
post_type_labels_revision (m) (wp-includes/post.php)
post_type_labels_nav_menu_item (m) (wp-includes/post.php)
theme_root (m) (wp-includes/theme.php)
pre_option_active_plugins (m,p) (wp-includes/option.php)
option_active_plugins (m,p) (wp-includes/option.php)
pre_option_hack_file (m,p) (wp-includes/option.php)
option_hack_file (m,p) (wp-includes/option.php)
pre_option_blog_charset (m,p) (wp-includes/option.php)
option_blog_charset (m,p) (wp-includes/option.php)
plugins_loaded (m,p) (wp-settings.php)
load_default_widgets (m,p) (wp-includes/functions.php)
load_default_embeds (m,p) (wp-includes/media.php)
wp_audio_extensions (m,p) (wp-includes/media.php)
wp_audio_embed_handler (m,p) (wp-includes/media.php)
wp_video_extensions (m,p) (wp-includes/media.php)
wp_video_embed_handler (m,p) (wp-includes/media.php)
sanitize_comment_cookies (m,p) (wp-settings.php)
pre_option_permalink_structure (m,p) (wp-includes/option.php)
option_permalink_structure (m,p) (wp-includes/option.php)
pre_option_wpcm_user_roles (m,p) (wp-includes/option.php)
option_wpcm_user_roles (m,p) (wp-includes/option.php)
setup_theme (m,p) (wp-settings.php)
pre_option_template (m,p,t) (wp-includes/option.php)
option_template (m,p,t) (wp-includes/option.php)
template (m,p,t) (wp-includes/theme.php)
template_directory (m,p,t) (wp-includes/theme.php)
pre_option_stylesheet (m,p,t) (wp-includes/option.php)
option_stylesheet (m,p,t) (wp-includes/option.php)
stylesheet (m,p,t) (wp-includes/theme.php)
stylesheet_directory (m,p,t) (wp-includes/theme.php)
pre_option_WPLANG (m,p,t) (wp-includes/option.php)
option_WPLANG (m,p,t) (wp-includes/option.php)
locale (m,p,t) (wp-includes/l10n.php)
override_unload_textdomain (m,p,t) (wp-includes/l10n.php)
unload_textdomain (m,p,t) (wp-includes/l10n.php)
override_load_textdomain (m,p,t) (wp-includes/l10n.php)
load_textdomain (m,p,t) (wp-includes/l10n.php)
load_textdomain_mofile (m,p,t) (wp-includes/l10n.php)
locale (m,p,t) (wp-includes/l10n.php)
wp_cache_themes_persistently (m,p,t) (wp-includes/class-wp-theme.php)
extra_theme_headers (m,p,t) (wp-includes/functions.php)
pre_option_sds_theme_options (m,p,t) (wp-includes/option.php)
option_sds_theme_options (m,p,t) (wp-includes/option.php)
determine_current_user (m,p,t) (wp-includes/pluggable.php)
auth_cookie_malformed (m,p,t) (wp-includes/pluggable.php)
set_current_user (m,p,t) (wp-includes/pluggable.php)
map_meta_cap (m,p,t) (wp-includes/capabilities.php)
user_has_cap (m,p,t) (wp-includes/capabilities.php)
after_setup_theme (m,p,t) (wp-settings.php)
theme_locale (m,p,t) (wp-includes/l10n.php)
init (m,p,t) (wp-settings.php)
post_format_rewrite_base (m,p,t) (wp-includes/taxonomy.php)
pre_option_category_base (m,p,t) (wp-includes/option.php)
option_category_base (m,p,t) (wp-includes/option.php)
pre_option_tag_base (m,p,t) (wp-includes/option.php)
option_tag_base (m,p,t) (wp-includes/option.php)
pre_option_link_manager_enabled (m,p,t) (wp-includes/option.php)
option_link_manager_enabled (m,p,t) (wp-includes/option.php)
pre_option_sidebars_widgets (m,p,t) (wp-includes/option.php)
option_sidebars_widgets (m,p,t) (wp-includes/option.php)
sidebars_widgets (m,p,t) (wp-includes/widgets.php)
widgets_init (m,p,t) (wp-includes/default-widgets.php)
register_sidebar (m,p,t) (wp-includes/widgets.php)
pre_option_widget_pages (m,p,t) (wp-includes/option.php)
default_option_widget_pages (m,p,t) (wp-includes/option.php)
wp_register_sidebar_widget (m,p,t) (wp-includes/widgets.php)
pre_option_widget_calendar (m,p,t) (wp-includes/option.php)
default_option_widget_calendar (m,p,t) (wp-includes/option.php)
pre_option_widget_archives (m,p,t) (wp-includes/option.php)
option_widget_archives (m,p,t) (wp-includes/option.php)
pre_option_widget_meta (m,p,t) (wp-includes/option.php)
option_widget_meta (m,p,t) (wp-includes/option.php)
pre_option_widget_search (m,p,t) (wp-includes/option.php)
option_widget_search (m,p,t) (wp-includes/option.php)
pre_option_widget_text (m,p,t) (wp-includes/option.php)
option_widget_text (m,p,t) (wp-includes/option.php)
pre_option_widget_categories (m,p,t) (wp-includes/option.php)
option_widget_categories (m,p,t) (wp-includes/option.php)
pre_option_widget_recent-posts (m,p,t) (wp-includes/option.php)
option_widget_recent-posts (m,p,t) (wp-includes/option.php)
pre_option_widget_recent-comments (m,p,t) (wp-includes/option.php)
option_widget_recent-comments (m,p,t) (wp-includes/option.php)
pre_option_widget_rss (m,p,t) (wp-includes/option.php)
option_widget_rss (m,p,t) (wp-includes/option.php)
pre_option_widget_tag_cloud (m,p,t) (wp-includes/option.php)
default_option_widget_tag_cloud (m,p,t) (wp-includes/option.php)
pre_option_widget_nav_menu (m,p,t) (wp-includes/option.php)
default_option_widget_nav_menu (m,p,t) (wp-includes/option.php)
pre_option_widget_sds-social-media-widget (m,p,t) (wp-includes/option.php)
default_option_widget_sds-social-media-widget (m,p,t) (wp-includes/option.php)
pre_option_widget_bdes_topix (m,p,t) (wp-includes/option.php)
option_widget_bdes_topix (m,p,t) (wp-includes/option.php)
pre_option_use_smilies (m,p,t) (wp-includes/option.php)
option_use_smilies (m,p,t) (wp-includes/option.php)
wp_spaces_regexp (m,p,t) (wp-includes/formatting.php)
plugin_locale (m,p,t) (wp-includes/l10n.php)
pre_option_syntaxhighlighter_settings (m,p,t) (wp-includes/option.php)
option_syntaxhighlighter_settings (m,p,t) (wp-includes/option.php)
set_url_scheme (m,p,t) (wp-includes/link-template.php)
plugins_url (m,p,t) (wp-includes/link-template.php)
wp_default_scripts (m,p,t) (wp-includes/class.wp-scripts.php)
site_url (m,p,t) (wp-includes/link-template.php)
attribute_escape (m,p,t) (wp-includes/formatting.php)
heartbeat_settings (m,p,t) (wp-includes/script-loader.php)
admin_url (m,p,t) (wp-includes/link-template.php)
wp_auth_check_interval (m,p,t) (wp-includes/script-loader.php)
includes_url (m,p,t) (wp-includes/link-template.php)
wp_default_styles (m,p,t) (wp-includes/class.wp-styles.php)
pre_option_cron (m,p,t) (wp-includes/option.php)
option_cron (m,p,t) (wp-includes/option.php)
post_type_labels_xcust_pt (m,p,t) (wp-includes/post.php)
wp_parse_str (m,p,t) (wp-includes/formatting.php)
pre_option_theme_switched (m,p,t) (wp-includes/option.php)
option_theme_switched (m,p,t) (wp-includes/option.php)
wp_loaded (m,p,t) (wp-settings.php)
nocache_headers (m,p,t) (wp-includes/functions.php)
pre_option_html_type (m,p,t) (wp-includes/option.php)
option_html_type (m,p,t) (wp-includes/option.php)
login_init (m,p,t) (wp-login.php)
login_form_login (m,p,t) (wp-login.php)
wp_authenticate (m,p,t) (wp-includes/user.php)
secure_signon_cookie (m,p,t) (wp-includes/user.php)
sanitize_user (m,p,t) (wp-includes/formatting.php)
authenticate (m,p,t) (wp-includes/pluggable.php)
login_redirect (m,p,t) (wp-login.php)
wp_login_errors (m,p,t) (wp-login.php)
shake_error_codes (m,p,t) (wp-login.php)
language_attributes (m,p,t) (wp-includes/general-template.php)
bloginfo (m,p,t) (wp-includes/general-template.php)
run_wptexturize (m,p,t) (wp-includes/formatting.php)
no_texturize_tags (m,p,t) (wp-includes/formatting.php)
no_texturize_shortcodes (m,p,t) (wp-includes/formatting.php)
esc_html (m,p,t) (wp-includes/formatting.php)
pre_option_blogname (m,p,t) (wp-includes/option.php)
option_blogname (m,p,t) (wp-includes/option.php)
print_styles_array (m,p,t) (wp-includes/class.wp-styles.php)
style_loader_src (m,p,t) (wp-includes/class.wp-styles.php)
kses_allowed_protocols (m,p,t) (wp-includes/functions.php)
clean_url (m,p,t) (wp-includes/formatting.php)
style_loader_tag (m,p,t) (wp-includes/class.wp-styles.php)
login_enqueue_scripts (m,p,t) (wp-login.php)
login_head (m,p,t) (wp-login.php)
wp_print_scripts (m,p,t) (wp-includes/script-loader.php)
pre_site_option_can_compress_scripts (m,p,t) (wp-includes/option.php)
default_site_option_can_compress_scripts (m,p,t) (wp-includes/option.php)
pre_option_can_compress_scripts (m,p,t) (wp-includes/option.php)
option_can_compress_scripts (m,p,t) (wp-includes/option.php)
site_option_can_compress_scripts (m,p,t) (wp-includes/option.php)
print_scripts_array (m,p,t) (wp-includes/class.wp-scripts.php)
print_head_scripts (m,p,t) (wp-includes/script-loader.php)
login_headerurl (m,p,t) (wp-login.php)
login_headertitle (m,p,t) (wp-login.php)
sanitize_html_class (m,p,t) (wp-includes/formatting.php)
login_body_class (m,p,t) (wp-login.php)
login_message (m,p,t) (wp-login.php)
login_messages (m,p,t) (wp-login.php)
login_form (m,p,t) (wp-login.php)
pre_option_users_can_register (m,p,t) (wp-includes/option.php)
option_users_can_register (m,p,t) (wp-includes/option.php)
lostpassword_url (m,p,t) (wp-includes/general-template.php)
home_url (m,p,t) (wp-includes/link-template.php)
login_footer (m,p,t) (wp-login.php)
wp_print_footer_scripts (m,p,t) (wp-includes/script-loader.php)
print_late_styles (m,p,t) (wp-includes/script-loader.php)
print_footer_scripts (m,p,t) (wp-includes/script-loader.php)
shutdown (m,p,t) (wp-includes/load.php)