WordPress Code Reference

wpmu_welcome_notification

Summery Summery

Filters whether to bypass the welcome email after site activation.

apply_filters( 'wpmu_welcome_notification', int|bool $blog_id, int $user_id, string $password, string $title, array $meta )

Returning false disables the welcome email.

$blog_id: Blog ID.
$user_id: User ID.
$password: User password.
$title: Site title.
$meta: Signup meta data. By default, contains the requested privacy setting and lang_id.

Changelog
Version	Description
MU (3.0.0)	Introduced.