New plugin hooks in WordPress 3.0

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_header		action	YES	1
2	activate_wp_head		action	YES	1
3	app_ns		action	YES	1
4	app_head		action	YES	1
5	app_entry		action	YES	1
6	comment_on_password_protected		action	YES	1
7	opml_head		action	YES	1
8	after_setup_theme		action	YES	1
9	wp_loaded		action	YES	1
10	signup_header		action	YES	1
11	before_signup_form		action	YES	1
12	signup_blogform		action	YES	1
13	signup_extra_fields		action	YES	1
14	signup_hidden_fields		action	YES	1
15	signup_finished		action	YES	1
16	preprocess_signup_form		action	YES	1
17	after_signup_form		action	YES	1
18	in_admin_header		action	YES	1
19	after_mu_upgrade		action	YES	1
20	add_meta_boxes		action	YES	1
21	add_meta_boxes_{$post_type}	note	action	YES	1
22	post_edit_form_tag		action	YES	1
23	add_meta_boxes_comment		action	YES	1
24	add_meta_boxes_link		action	YES	1
25	{$taxonomy}_pre_edit_form	note	action	YES	1
26	{$taxonomy}_edit_form_fields	note	action	YES	1
27	{$taxonomy}_edit_form	note	action	YES	1
28	after-{$taxonomy}-table	note	action	YES	1
29	{$taxonomy}_pre_add_form	note	action	YES	1
30	add_tag_form_fields		action	YES	1
31	{$taxonomy}_add_form_fields	note	action	YES	1
32	{$taxonomy}_add_form	note	action	YES	1
33	wpmuadminresult		action	YES	1
34	mu_rightnow_end		action	YES	1
35	mu_activity_box_end		action	YES	1
36	wpmuadminedit		action	YES	1
37	update_wpmu_options		action	YES	1
38	wpmu_update_blog_options		action	YES	1
39	archive_blog		action	YES	1
40	unarchive_blog		action	YES	1
41	activate_blog		action	YES	1
42	deactivate_blog		action	YES	1
43	wpmu_options		action	YES	1
44	wpmueditblogaction		action	YES	1
45	wpmublogsaction		action	YES	1
46	manage_blogs_custom_column		action	YES	1
47	wpmu_upgrade_site		action	YES	1
48	wpmu_upgrade_page		action	YES	1
49	myblogs_allblogs_options		action	YES	1
50	wp_update_nav_menu		action	YES	1
51	pre_current_active_plugins		action	YES	1
52	user_edit_form_tag		action	YES	1
53	admin_color_scheme_picker		action	YES	1
54	user_new_form_tag		action	YES	1
55	widgets_admin_page		action	YES	1
56	right_now_content_table_end		action	YES	1
57	right_now_discussion_table_end		action	YES	1
58	delete_blog		action	YES	1
59	wpmu_delete_user		action	YES	1
60	make_spam_user		action	YES	1
61	make_ham_user		action	YES	1
62	grant_super_admin		action	YES	1
63	granted_super_admin		action	YES	1
64	revoke_super_admin		action	YES	1
65	revoked_super_admin		action	YES	1
66	pre_user_search		action	YES	1
67	twentyten_credits		action	YES	1
68	comment_form_before		action	YES	1
69	comment_form_must_log_in_after		action	YES	1
70	comment_form_top		action	YES	1
71	comment_form_logged_in_after		action	YES	1
72	comment_form_before_fields		action	YES	1
73	comment_form_after_fields		action	YES	1
74	comment_form_after		action	YES	1
75	comment_form_comments_closed		action	YES	1
76	comment_duplicate_trigger		action	YES	1
77	wp_feed_options		action	YES	1
78	update_option_{$option}	note	action	YES	1
79	add_option_{$option}	note	action	YES	1
80	delete_option_{$option}	note	action	YES	1
81	delete_transient_{$transient}	note	action	YES	1
82	deleted_transient		action	YES	1
83	set_transient_{$transient}	note	action	YES	1
84	setted_transient		action	YES	1
85	deprecated_argument_run		action	YES	1
86	add_site_option_{$option}	note	action	YES	1
87	add_site_option		action	YES	1
88	pre_delete_site_option_{$option}	note	action	YES	1
89	delete_site_option_{$option}	note	action	YES	1
90	delete_site_option		action	YES	1
91	update_site_option_{$option}	note	action	YES	1
92	update_site_option		action	YES	1
93	delete_site_transient_{$transient}	note	action	YES	1
94	deleted_site_transient		action	YES	1
95	set_site_transient_{$transient}	note	action	YES	1
96	setted_site_transient		action	YES	1
97	get_template_part_{$slug}	note	action	YES	1
98	unload_textdomain		action	YES	1
99	wpmu_blog_updated		action	YES	1
100	make_spam_blog		action	YES	1
101	make_ham_blog		action	YES	1
102	switch_blog		action	YES	1
103	add_user_to_blog		action	YES	1
104	remove_user_from_blog		action	YES	1
105	wpmu_activate_user		action	YES	1
106	wpmu_activate_blog		action	YES	1
107	wpmu_new_user		action	YES	1
108	wpmu_new_blog		action	YES	1
109	added_existing_user		action	YES	1
110	update_blog_public		action	YES	1
111	wp_delete_nav_menu		action	YES	1
112	wp_create_nav_menu		action	YES	1
113	wp_update_nav_menu_item		action	YES	1
114	post_updated		action	YES	1
115	clean_attachment_cache		action	YES	1
116	register_sidebar		action	YES	1
117	wp_register_sidebar_widget		action	YES	1
118	wp_unregister_sidebar_widget		action	YES	1
119	dynamic_sidebar		action	YES	1
120	the_widget		action	YES	1
121	shake_error_codes		filter	YES	1
122	lostpassword_redirect		filter	YES	1
123	wp_signup_location		filter	YES	1
124	registration_redirect		filter	YES	1
125	enable_post_by_email_configuration		filter	YES	1
126	signup_another_blog_init		filter	YES	1
127	signup_create_blog_meta		filter	YES	1
128	add_signup_meta		filter	YES	1
129	signup_user_init		filter	YES	1
130	signup_blog_init		filter	YES	1
131	wpmu_active_signup		filter	YES	1
132	nav_menu_meta_box_object		filter	YES	1
133	privacy_on_link_title		filter	YES	1
134	privacy_on_link_text		filter	YES	1
135	admin_user_info_links		filter	YES	1
136	do_mu_upgrade		filter	YES	1
137	admin_memory_limit		filter	YES	1
138	post_updated_messages		filter	YES	1
139	edit_{$taxonomy}_per_page	note	filter	YES	1
140	parent_file		filter	YES	1
141	delete_site_email_content		filter	YES	1
142	subdirectory_reserved_names		filter	YES	1
143	mu_menu_items		filter	YES	1
144	ms_sites_per_page		filter	YES	1
145	wpmu_blogs_columns		filter	YES	1
146	ms_users_per_page		filter	YES	1
147	wpmu_users_columns		filter	YES	1
148	show_adduser_fields		filter	YES	1
149	myblogs_options		filter	YES	1
150	myblogs_blog_actions		filter	YES	1
151	allow_subdirectory_install		filter	YES	1
152	enable_update_services_configuration		filter	YES	1
153	all_plugins		filter	YES	1
154	show_advanced_plugins		filter	YES	1
155	enable_edit_any_user_configuration		filter	YES	1
156	update_bulk_plugins_complete_actions		filter	YES	1
157	update_bulk_theme_complete_actions		filter	YES	1
158	unzip_file_use_ziparchive		filter	YES	1
159	{$type}_upload_iframe_src	note	filter	YES	1
160	wpmu_drop_tables		filter	YES	1
161	wpmu_delete_blog_upload_dir		filter	YES	1
162	new_admin_email_content		filter	YES	1
163	new_user_email_content		filter	YES	1
164	lang_codes		filter	YES	1
165	mu_dropdown_languages		filter	YES	1
166	wp_edit_nav_menu_walker		filter	YES	1
167	{$per_page}	note	filter	YES	1
168	{$taxonomy}_row_actions	note	filter	YES	1
169	manage_{$post_type}_posts_columns	note	filter	YES	1
170	manage_{$screen->id}_columns	note	filter	YES	1
171	screen_settings		filter	YES	1
172	current_screen		filter	YES	1
173	allowed_themes		filter	YES	1
174	tables_to_repair		filter	YES	1
175	twentyten_attachment_size		filter	YES	1
176	twentyten_author_bio_avatar_size		filter	YES	1
177	twentyten_header_image_width		filter	YES	1
178	twentyten_header_image_height		filter	YES	1
179	comment_id_fields		filter	YES	1
180	comment_form_default_fields		filter	YES	1
181	comment_form_defaults		filter	YES	1
182	comment_form_logged_in		filter	YES	1
183	comment_form_field_{$name}	note	filter	YES	1
184	comment_form_field_comment		filter	YES	1
185	comment_max_links_url		filter	YES	1
186	sanitize_key		filter	YES	1
187	pre_option_{$option}	note	filter	YES	1
188	option_{$option}	note	filter	YES	1
189	pre_update_option_{$option}	note	filter	YES	1
190	pre_set_transient_{$transient}	note	filter	YES	1
191	robots_txt		filter	YES	1
192	wp_upload_bits		filter	YES	1
193	getimagesize_mimes_to_exts		filter	YES	1
194	wp_check_filetype_and_ext		filter	YES	1
195	wp_die_handler		filter	YES	1
196	deprecated_argument_trigger_error		filter	YES	1
197	pre_site_option_{$option}	note	filter	YES	1
198	site_option_{$option}	note	filter	YES	1
199	pre_add_site_option_{$option}	note	filter	YES	1
200	pre_update_site_option_{$option}	note	filter	YES	1
201	pre_set_site_transient_{$transient}	note	filter	YES	1
202	global_terms_enabled		filter	YES	1
203	login_form_defaults		filter	YES	1
204	login_form_top		filter	YES	1
205	login_form_middle		filter	YES	1
206	login_form_bottom		filter	YES	1
207	get_calendar		filter	YES	1
208	get_the_date		filter	YES	1
209	paginate_links		filter	YES	1
210	kses_allowed_protocols		filter	YES	1
211	override_unload_textdomain		filter	YES	1
212	plugin_locale		filter	YES	1
213	theme_locale		filter	YES	1
214	pre_post_link		filter	YES	1
215	post_type_link		filter	YES	1
216	the_feed_link		filter	YES	1
217	taxonomy_feed_link		filter	YES	1
218	search_link		filter	YES	1
219	home_url		filter	YES	1
220	network_site_url		filter	YES	1
221	network_home_url		filter	YES	1
222	network_admin_url		filter	YES	1
223	pre_get_shortlink		filter	YES	1
224	get_shortlink		filter	YES	1
225	the_shortlink		filter	YES	1
226	blog_details		filter	YES	1
227	blog_option_{$setting}	note	filter	YES	1
228	graceful_fail		filter	YES	1
229	graceful_fail_template		filter	YES	1
230	get_blogs_of_user		filter	YES	1
231	wpmu_validate_user_signup		filter	YES	1
232	newblogname		filter	YES	1
233	wpmu_validate_blog_signup		filter	YES	1
234	wpmu_signup_blog_notification		filter	YES	1
235	wpmu_signup_blog_notification_email		filter	YES	1
236	wpmu_signup_blog_notification_subject		filter	YES	1
237	wpmu_signup_user_notification		filter	YES	1
238	wpmu_signup_user_notification_email		filter	YES	1
239	wpmu_signup_user_notification_subject		filter	YES	1
240	newblog_notify_siteadmin		filter	YES	1
241	newuser_notify_siteadmin		filter	YES	1
242	wpmu_welcome_notification		filter	YES	1
243	update_welcome_email		filter	YES	1
244	update_welcome_subject		filter	YES	1
245	wpmu_welcome_user_notification		filter	YES	1
246	update_welcome_user_email		filter	YES	1
247	update_welcome_user_subject		filter	YES	1
248	blog_redirect_404		filter	YES	1
249	ms_site_check		filter	YES	1
250	nav_menu_css_class		filter	YES	1
251	walker_nav_menu_start_el		filter	YES	1
252	wp_nav_menu_args		filter	YES	1
253	wp_nav_menu_container_allowedtags		filter	YES	1
254	wp_nav_menu_items		filter	YES	1
255	wp_nav_menu_{$menu->slug}_items	note	filter	YES	1
256	wp_nav_menu		filter	YES	1
257	wp_get_nav_menus		filter	YES	1
258	wp_get_nav_menu_items		filter	YES	1
259	nav_menu_attr_title		filter	YES	1
260	nav_menu_description		filter	YES	1
261	wp_setup_nav_menu_item		filter	YES	1
262	random_password		filter	YES	1
263	get_avatar_comment_types		filter	YES	1
264	wp_link_pages_args		filter	YES	1
265	posts_search		filter	YES	1
266	pre_insert_term		filter	YES	1
267	template_include		filter	YES	1
268	author_template		filter	YES	1
269	front_page_template		filter	YES	1
270	single_template		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.