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filter is not described

wpmu_signup_user_notification_subject filter-hook . WP 3.0.0

Filters the subject of the notification email of new user signup.

Usage

add_filter( 'wpmu_signup_user_notification_subject', 'filter_function_name_2186', 10, 6 );
function filter_function_name_2186( $subject, $user_login, $user_email, $key, $meta, $meta ){
	// filter...

	return $subject;
}
$subject(string)
Subject of the notification email.
$user_login(string)
User login name.
$user_email(string)
User email address.
$key(string)
Activation key created in wpmu_signup_user().
$meta(array)
Signup meta data.
Default: empty array
$meta
-

Changelog

Since 3.0.0 Introduced.

Where the hook is called

wpmu_signup_user_notification()
wpmu_signup_user_notification_subject
wp-includes/ms-functions.php 1081-1089
apply_filters(
	'wpmu_signup_user_notification_subject',
	/* translators: New user notification email subject. 1: Network name, 2: New user login */
	_x( '[%1$s] Activate %2$s', 'New user notification email subject' ),
	$user_login,
	$user_email,
	$key,
	$meta
),

Where the hook is used (in WP core)

Usage not found!