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action is not described

after_signup_site action-hook . WP 4.4.0

Fires after site signup information has been written to the database.

Usage

add_action( 'after_signup_site', 'action_function_name_4355', 10, 7 );
function action_function_name_4355( $domain, $path, $title, $user, $user_email, $key, $meta ){
	// action...
}
$domain(string)
The requested domain.
$path(string)
The requested path.
$title(string)
The requested site title.
$user(string)
The user's requested login name.
$user_email(string)
The user's email address.
$key(string)
The user's activation key.
$meta(array)
Signup meta data. By default, contains the requested privacy setting and lang_id.

Where the hook is called

wpmu_signup_blog()
wp-includes/ms-functions.php 752
do_action( 'after_signup_site', $domain, $path, $title, $user, $user_email, $key, $meta );

Where the hook is used (in WP core)

wp-includes/ms-default-filters.php 43
add_action( 'after_signup_site', 'wpmu_signup_blog_notification', 10, 7 );