New plugin hooks in WordPress 5.4

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	add_trashed_suffix_to_trashed_posts		filter	YES	1
2	admin_email_remind_interval		filter	YES	1
3	do_favicon		action	YES	1
4	do_faviconico		action	YES	1
5	rest_{$this->post_type}_item_schema	note	filter	YES	1
6	user_erasure_complete_email_headers		filter	YES	1
7	user_request_action_email_headers		filter	YES	1
8	user_request_confirmed_email_headers		filter	YES	1
9	wp_nav_menu_item_custom_fields		action	YES	1
10	wp_nav_menu_item_custom_fields_customize_template		action	YES	1
11	wp_privacy_additional_user_profile_data		filter	YES	1
12	wp_privacy_personal_data_email_headers		filter	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.