New plugin hooks in WordPress 2.0

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	activate_{$plugin}	note	action	YES	1
2	activity_box_end		action	YES	1
3	add_attachment		action	YES	1
4	add_link		action	YES	1
5	add_ping		filter	YES	1
6	atom_entry		action	YES	1
7	atom_head		action	YES	1
8	atom_ns		action	YES	1
9	attachment_icon		filter	YES	1
10	attachment_innerHTML		filter	YES	1
11	attachment_link		filter	YES	1
12	attachment_max_dims		filter	YES	1
13	comment_status_pre		filter	YES	1
14	create_category		action	YES	1
15	create_user_query		filter	YES	1
16	deactivate_{$plugin}	note	action	YES	1
17	delete_attachment		action	YES	1
18	delete_link		action	YES	1
19	delete_user		action	YES	1
20	edit_attachment		action	YES	1
21	edit_category		action	YES	1
22	edit_link		action	YES	1
23	edit_user_profile		action	YES	1
24	get_editable_authors		filter	YES	1
25	get_enclosed		filter	YES	1
26	get_others_drafts		filter	YES	1
27	get_pung		filter	YES	1
28	get_the_modified_time		filter	YES	1
29	get_to_ping		filter	YES	1
30	get_users_drafts		filter	YES	1
31	icon_dir		filter	YES	1
32	icon_dir_uri		filter	YES	1
33	kubrick_header_color		filter	YES	1
34	kubrick_header_display		filter	YES	1
35	kubrick_header_image		filter	YES	1
36	loop_end		action	YES	1
37	loop_start		action	YES	1
38	mce_browsers		filter	YES	1
39	mce_buttons		filter	YES	1
40	mce_buttons_2		filter	YES	1
41	mce_buttons_3		filter	YES	1
42	mce_options		action	YES	1
43	mce_plugins		filter	YES	1
44	mce_theme		filter	YES	1
45	mce_valid_elements		filter	YES	1
46	personal_options_update		action	YES	1
47	ping_status_pre		filter	YES	1
48	posts_groupby		filter	YES	1
49	posts_request		filter	YES	1
50	post_mime_type_pre		filter	YES	1
51	prepend_attachment		filter	YES	1
52	pre_get_posts		action	YES	1
53	pre_ping		action	YES	1
54	profile_personal_options		action	YES	1
55	profile_update		action	YES	1
56	rdf_header		action	YES	1
57	rdf_item		action	YES	1
58	rdf_ns		action	YES	1
59	richedit_pre		filter	YES	1
60	role_has_cap		filter	YES	1
61	rss2_head		action	YES	1
62	rss2_item		action	YES	1
63	rss2_ns		action	YES	1
64	rss_head		action	YES	1
65	rss_item		action	YES	1
66	show_user_profile		action	YES	1
67	the_author		filter	YES	1
68	the_content_rss		filter	YES	1
69	the_modified_time		filter	YES	1
70	thumbnail_filename		filter	YES	1
71	tinymce_before_init		action	YES	1
72	update_user_query		filter	YES	1
73	uploading_iframe_src		filter	YES	1
74	upload_dir		filter	YES	1
75	upload_mimes		filter	YES	1
76	user_has_cap		filter	YES	1
77	wp_insert_post		action	YES	1
78	wp_title		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.