New plugin hooks in WordPress 5.6

Important! Some WordPress hooks get applied in multiple PHP files. If you are trying to figure out what a specific WordPress hook does, sort the table by "hook" and make sure you are looking in all the files where it occurs.

• To sort the table, click on a column title.
• Click a hook name to see details about the hook.
• Click a file name to see only hooks used in that file.

	Hook		Type	New?	Instances
1	after_core_auto_updates_settings		action	YES	1
2	application_password_did_authenticate		action	YES	1
3	application_password_failed_authentication		action	YES	1
4	application_password_is_api_request		filter	YES	1
5	block_default_classname		filter	YES	1
6	comments_template_top_level_query_args		filter	YES	1
7	do_all_pings		action	YES	1
8	email_exists		filter	YES	1
9	image_sideload_extensions		filter	YES	1
10	invited_user_email		filter	YES	1
11	is_wp_error_instance		action	YES	1
12	manage_{$this->screen->id}_custom_column	note	action	YES	1
13	manage_{$this->screen->id}_custom_column_js_template	note	action	YES	1
14	network_site_info_form		action	YES	1
15	new_site_email		filter	YES	1
16	pre_recurse_dirsize		filter	YES	1
17	quick_edit_dropdown_authors_args		filter	YES	1
18	rest_after_insert_application_password		action	YES	1
19	rest_get_max_batch_size		filter	YES	1
20	rest_post_format_search_query		filter	YES	1
21	rest_prepare_application_password		filter	YES	1
22	rest_pre_insert_application_password		filter	YES	1
23	rest_term_search_query		filter	YES	1
24	send_new_site_email		filter	YES	1
25	should_load_block_editor_scripts_and_styles		filter	YES	1
26	site_health_test_rest_capability_{$check}	note	filter	YES	1
27	twentytwentyone_html_classes		filter	YES	1
28	twenty_twenty_one_attachment_size		filter	YES	1
29	twenty_twenty_one_can_show_post_thumbnail		filter	YES	1
30	twenty_twenty_one_content_width		filter	YES	1
31	twenty_twenty_one_get_localized_font_family_elements		filter	YES	1
32	twenty_twenty_one_get_localized_font_family_types		filter	YES	1
33	twenty_twenty_one_social_icons_map		filter	YES	1
34	twenty_twenty_one_starter_content		filter	YES	1
35	twenty_twenty_one_svg_icons_social		filter	YES	1
36	twenty_twenty_one_svg_icons_{$group}	note	filter	YES	1
37	wp_after_insert_post		action	YES	1
38	wp_authenticate_application_password_errors		action	YES	1
39	wp_authorize_application_password_form		action	YES	1
40	wp_authorize_application_password_request_errors		action	YES	1
41	wp_create_application_password		action	YES	1
42	wp_create_application_password_form		action	YES	1
43	wp_delete_application_password		action	YES	1
44	wp_error_added		action	YES	1
45	wp_get_attachment_image		filter	YES	1
46	wp_installed_email		filter	YES	1
47	wp_is_application_passwords_available		filter	YES	1
48	wp_is_application_passwords_available_for_user		filter	YES	1
49	wp_untrash_post_status		filter	YES	1
50	wp_update_application_password		action	YES	1

Important warning about variable hooks

Some hooks have variables in their names. For example, pre_${taxonomy}_$field and admin_head- both have variable names. In general, any hook that ends (or begins) with - or _, or contains a $, has a variable name. Since the syntax with which these variables are defined may change from version to version, this page may think that a hook is deprecated (or new) even if it is not. You can usually catch this sort of thing by comparing this hook to the list of "related hooks" below.