WordPress Developer Resources

apply_filters( ‘wpmu_signup_user_notification’, string $user_login, string $user_email, string $key, array $meta )

Filters whether to bypass the email notification for new user sign-up.

Parameters

$user_loginstring: User login name.
$user_emailstring: User email address.
$keystring: Activation key created in wpmu_signup_user() .
$metaarray: Signup meta data. Default empty array.

Source

* replace it with your own notification behavior.

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Changelog

Version	Description
MU (3.0.0)	Introduced.

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