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}.’

Anonymous user visits a category archive

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)
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)
do_parse_request (m,p,t) (wp-includes/class-wp.php)
pre_option_rewrite_rules (m,p,t) (wp-includes/option.php)
option_rewrite_rules (m,p,t) (wp-includes/option.php)
home_url (m,p,t) (wp-includes/link-template.php)
query_vars (m,p,t) (wp-includes/class-wp.php)
request (m,p,t) (wp-includes/class-wp.php)
parse_request (m,p,t) (wp-includes/class-wp.php)
pre_option_html_type (m,p,t) (wp-includes/option.php)
option_html_type (m,p,t) (wp-includes/option.php)
wp_headers (m,p,t) (wp-includes/class-wp.php)
send_headers (m,p,t) (wp-includes/class-wp.php)
parse_tax_query (m,p,t) (wp-includes/query.php)
parse_query (m,p,t) (wp-includes/query.php)
pre_get_posts (m,p,t) (wp-includes/query.php)
pre_option_posts_per_page (m,p,t) (wp-includes/option.php)
option_posts_per_page (m,p,t) (wp-includes/option.php)
pre_option_comments_per_page (m,p,t) (wp-includes/option.php)
option_comments_per_page (m,p,t) (wp-includes/option.php)
posts_search (m,p,t) (wp-includes/query.php)
sanitize_title (m,p,t) (wp-includes/formatting.php)
pre_option_category_children (m,p,t) (wp-includes/option.php)
option_category_children (m,p,t) (wp-includes/option.php)
get_term (m,p,t) (wp-includes/taxonomy.php)
get_category (m,p,t) (wp-includes/taxonomy.php)
posts_where (m,p,t) (wp-includes/query.php)
posts_join (m,p,t) (wp-includes/query.php)
posts_where_paged (m,p,t) (wp-includes/query.php)
posts_groupby (m,p,t) (wp-includes/query.php)
posts_join_paged (m,p,t) (wp-includes/query.php)
posts_orderby (m,p,t) (wp-includes/query.php)
posts_distinct (m,p,t) (wp-includes/query.php)
post_limits (m,p,t) (wp-includes/query.php)
posts_fields (m,p,t) (wp-includes/query.php)
posts_clauses (m,p,t) (wp-includes/query.php)
posts_selection (m,p,t) (wp-includes/query.php)
posts_where_request (m,p,t) (wp-includes/query.php)
posts_groupby_request (m,p,t) (wp-includes/query.php)
posts_join_request (m,p,t) (wp-includes/query.php)
posts_orderby_request (m,p,t) (wp-includes/query.php)
posts_distinct_request (m,p,t) (wp-includes/query.php)
posts_fields_request (m,p,t) (wp-includes/query.php)
post_limits_request (m,p,t) (wp-includes/query.php)
posts_clauses_request (m,p,t) (wp-includes/query.php)
posts_request (m,p,t) (wp-includes/query.php)
split_the_query (m,p,t) (wp-includes/query.php)
posts_request_ids (m,p,t) (wp-includes/query.php)
found_posts_query (m,p,t) (wp-includes/query.php)
found_posts (m,p,t) (wp-includes/query.php)
wp_get_object_terms (m,p,t) (wp-includes/taxonomy.php)
posts_results (m,p,t) (wp-includes/query.php)
pre_option_sticky_posts (m,p,t) (wp-includes/option.php)
option_sticky_posts (m,p,t) (wp-includes/option.php)
the_posts (m,p,t) (wp-includes/query.php)
status_header (m,p,t) (wp-includes/functions.php)
wp (m,p,t) (wp-includes/class-wp.php)
template_redirect (m,p,t) (wp-includes/template-loader.php)
show_admin_bar (m,p,t) (wp-includes/admin-bar.php)
get_term (m,p,t) (wp-includes/taxonomy.php)
get_category (m,p,t) (wp-includes/taxonomy.php)
get_ancestors (m,p,t) (wp-includes/taxonomy.php)
user_trailingslashit (m,p,t) (wp-includes/link-template.php)
category_link (m,p,t) (wp-includes/taxonomy.php)
term_link (m,p,t) (wp-includes/taxonomy.php)
pre_option_show_on_front (m,p,t) (wp-includes/option.php)
option_show_on_front (m,p,t) (wp-includes/option.php)
pre_option_page_on_front (m,p,t) (wp-includes/option.php)
option_page_on_front (m,p,t) (wp-includes/option.php)
pre_get_shortlink (m,p,t) (wp-includes/link-template.php)
get_shortlink (m,p,t) (wp-includes/link-template.php)
category_template (m,p,t) (wp-includes/template.php)
archive_template (m,p,t) (wp-includes/template.php)
template_include (m,p,t) (wp-includes/template-loader.php)
get_header (m,p,t) (wp-includes/general-template.php)
wp_head (m,p,t) (wp-includes/general-template.php)
single_cat_title (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)
wp_title_parts (m,p,t) (wp-includes/general-template.php)
pre_option_blogname (m,p,t) (wp-includes/option.php)
option_blogname (m,p,t) (wp-includes/option.php)
bloginfo (m,p,t) (wp-includes/general-template.php)
esc_html (m,p,t) (wp-includes/formatting.php)
pre_option_blogdescription (m,p,t) (wp-includes/option.php)
option_blogdescription (m,p,t) (wp-includes/option.php)
wp_title (m,p,t) (wp-includes/general-template.php)
wp_enqueue_scripts (m,p,t) (wp-includes/script-loader.php)
content_url (m,p,t) (wp-includes/link-template.php)
theme_root_uri (m,p,t) (wp-includes/theme.php)
template_directory_uri (m,p,t) (wp-includes/theme.php)
pre_option_blog_public (m,p,t) (wp-includes/option.php)
option_blog_public (m,p,t) (wp-includes/option.php)
default_feed (m,p,t) (wp-includes/feed.php)
feed_content_type (m,p,t) (wp-includes/feed.php)
feed_link (m,p,t) (wp-includes/link-template.php)
kses_allowed_protocols (m,p,t) (wp-includes/functions.php)
clean_url (m,p,t) (wp-includes/formatting.php)
category_feed_link (m,p,t) (wp-includes/link-template.php)
wp_print_styles (m,p,t) (wp-includes/functions.wp-styles.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)
style_loader_tag (m,p,t) (wp-includes/class.wp-styles.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)
script_loader_src (m,p,t) (wp-includes/class.wp-scripts.php)
script_loader_tag (m,p,t) (wp-includes/class.wp-scripts.php)
print_head_scripts (m,p,t) (wp-includes/script-loader.php)
stylesheet_directory_uri (m,p,t) (wp-includes/theme.php)
locale_stylesheet_uri (m,p,t) (wp-includes/theme.php)
wp_generator_type (m,p,t) (wp-includes/general-template.php)
get_the_generator_xhtml (m,p,t) (wp-includes/general-template.php)
the_generator (m,p,t) (wp-includes/general-template.php)
pre_option_theme_mods_minimize (m,p,t) (wp-includes/option.php)
option_theme_mods_minimize (m,p,t) (wp-includes/option.php)
theme_mod_background_image (m,p,t) (wp-includes/theme.php)
theme_mod_background_color (m,p,t) (wp-includes/theme.php)
theme_mod_content_color (m,p,t) (wp-includes/theme.php)
language_attributes (m,p,t) (wp-includes/general-template.php)
sanitize_html_class (m,p,t) (wp-includes/formatting.php)
body_class (m,p,t) (wp-includes/post-template.php)
theme_mod_nav_menu_locations (m,p,t) (wp-includes/theme.php)
is_active_sidebar (m,p,t) (wp-includes/widgets.php)
wp_nav_menu_args (m,p,t) (wp-includes/nav-menu-template.php)
pre_wp_nav_menu (m,p,t) (wp-includes/nav-menu-template.php)
wp_page_menu_args (m,p,t) (wp-includes/post-template.php)
pre_option_date_format (m,p,t) (wp-includes/option.php)
option_date_format (m,p,t) (wp-includes/option.php)
wp_list_pages_excludes (m,p,t) (wp-includes/post-template.php)
get_pages (m,p,t) (wp-includes/post.php)
pre_option_page_for_posts (m,p,t) (wp-includes/option.php)
option_page_for_posts (m,p,t) (wp-includes/option.php)
page_css_class (m,p,t) (wp-includes/post-template.php)
_get_page_link (m,p,t) (wp-includes/link-template.php)
page_link (m,p,t) (wp-includes/link-template.php)
the_title (m,p,t) (wp-includes/post-template.php)
wp_list_pages (m,p,t) (wp-includes/post-template.php)
wp_page_menu (m,p,t) (wp-includes/post-template.php)
get_template_part_yoast (m,p,t) (wp-includes/general-template.php)
get_template_part_loop (m,p,t) (wp-includes/general-template.php)
loop_start (m,p,t) (wp-includes/query.php)
get_user_metadata (m,p,t) (wp-includes/meta.php)
the_post (m,p,t) (wp-includes/query.php)
get_the_terms (m,p,t) (wp-includes/category-template.php)
get_post_metadata (m,p,t) (wp-includes/meta.php)
get_the_categories (m,p,t) (wp-includes/category-template.php)
get_the_tags (m,p,t) (wp-includes/category-template.php)
post_class (m,p,t) (wp-includes/post-template.php)
pre_post_link (m,p,t) (wp-includes/link-template.php)
post_link (m,p,t) (wp-includes/link-template.php)
the_permalink (m,p,t) (wp-includes/link-template.php)
the_title (m,p,t) (wp-includes/post-template.php)
loop_end (m,p,t) (wp-includes/query.php)
get_template_part_post (m,p,t) (wp-includes/general-template.php)
get_pagenum_link (m,p,t) (wp-includes/link-template.php)
get_sidebar (m,p,t) (wp-includes/general-template.php)
dynamic_sidebar_before (m,p,t) (wp-includes/widgets.php)
dynamic_sidebar_params (m,p,t) (wp-includes/widgets.php)
dynamic_sidebar (m,p,t) (wp-includes/widgets.php)
widget_display_callback (m,p,t) (wp-includes/widgets.php)
widget_title (m,p,t) (wp-includes/default-widgets.php)
pre_get_search_form (m,p,t) (wp-includes/general-template.php)
search_form_format (m,p,t) (wp-includes/general-template.php)
get_search_query (m,p,t) (wp-includes/general-template.php)
get_search_form (m,p,t) (wp-includes/general-template.php)
widget_title (m,p,t) (wp-includes/default-widgets.php)
widget_categories_dropdown_args (m,p,t) (wp-includes/default-widgets.php)
get_terms_args (m,p,t) (wp-includes/taxonomy.php)
get_terms_orderby (m,p,t) (wp-includes/taxonomy.php)
list_terms_exclusions (m,p,t) (wp-includes/taxonomy.php)
get_terms_fields (m,p,t) (wp-includes/taxonomy.php)
terms_clauses (m,p,t) (wp-includes/taxonomy.php)
get_terms (m,p,t) (wp-includes/taxonomy.php)
list_cats (m,p,t) (wp-includes/category-template.php)
wp_dropdown_cats (m,p,t) (wp-includes/category-template.php)
pre_transient_topics_titles_urls (m,p,t) (wp-includes/option.php)
pre_option__transient_timeout_topics_titles_urls (m,p,t) (wp-includes/option.php)
option__transient_timeout_topics_titles_urls (m,p,t) (wp-includes/option.php)
pre_option__transient_topics_titles_urls (m,p,t) (wp-includes/option.php)
option__transient_topics_titles_urls (m,p,t) (wp-includes/option.php)
transient_topics_titles_urls (m,p,t) (wp-includes/option.php)
dynamic_sidebar_after (m,p,t) (wp-includes/widgets.php)
dynamic_sidebar_has_widgets (m,p,t) (wp-includes/widgets.php)
get_footer (m,p,t) (wp-includes/general-template.php)
wp_footer (m,p,t) (wp-includes/general-template.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)