WordPress at a glance
action is not described

wpmu_activate_blog action-hook . WP MU

Fires immediately after a site is activated.


add_action( 'wpmu_activate_blog', 'action_function_name_8314', 10, 5 );
function action_function_name_8314( $blog_id, $user_id, $password, $signup_title, $meta ){
	// action...
Blog ID.
User ID.
User password.
Site title.
Signup meta data. By default, contains the requested privacy setting and lang_id.


  • Since MU (3.0.0)

Where the hook is called

wp-includes/ms-functions.php 1116
do_action( 'wpmu_activate_blog', $blog_id, $user_id, $password, $signup->title, $meta );

Where the hook is used (in WP core)

wp-includes/ms-default-filters.php 42
add_action( 'wpmu_activate_blog', 'wpmu_welcome_notification', 10, 5 );