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

$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.

File: wp-includes/ms-functions.php. View all references

apply_filters(
	'wpmu_signup_user_notification_subject',
	/* translators: New user notification email subject. 1: Network title, 2: New user login. */
	_x( '[%1$s] Activate %2$s', 'New user notification email subject' ),
	$user_login,
	$user_email,
	$key,
	$meta
),