wp-includes/ms-functions.php:1086Sends a confirmation request email to a user when they sign up for a new user account (without signing up for a site at the same time). The user account will not become active until the confirmation link is clicked.
$user_loginstring$user_emailstring$keystring$metaarrayoptionalarray()bool3 hooks fire while wpmu_signup_user_notification() runs, in this order:
Filters whether to bypass the email notification for new user sign-up.
Filters the content of the notification email for new user sign-up.
Filters the subject of the notification email of new user signup.
function wpmu_signup_user_notification( $user_login, $user_email, #[\SensitiveParameter] $key, $meta = array()) { /** * Filters whether to bypass the email notification for new user sign-up. * * @since MU (3.0.0) * * @param string $user_login User login name. * @param string $user_email User email address. * @param string $key Activation key created in wpmu_signup_user(). * @param array $meta Signup meta data. Default empty array. */ if ( ! apply_filters( 'wpmu_signup_user_notification', $user_login, $user_email, $key, $meta ) ) { return false; } $user = get_user_by( 'login', $user_login ); $switched_locale = $user && switch_to_user_locale( $user->ID ); // Send email with activation link. $admin_email = get_site_option( 'admin_email' ); if ( '' === $admin_email ) { $admin_email = 'support@' . wp_parse_url( network_home_url(), PHP_URL_HOST ); } $from_name = ( '' !== get_site_option( 'site_name' ) ) ? esc_html( get_site_option( 'site_name' ) ) : 'WordPress'; $message_headers = "From: \"{$from_name}\" <{$admin_email}>\n" . 'Content-Type: text/plain; charset="' . get_option( 'blog_charset' ) . "\"\n"; $message = sprintf( /** * Filters the content of the notification email for new user sign-up. * * Content should be formatted for transmission via wp_mail(). * * @since MU (3.0.0) * * @param string $content Content of the notification email. * @param string $user_login User login name. * @param string $user_email User email address. * @param string $key Activation key created in wpmu_signup_user(). * @param array $meta Signup meta data. Default empty array. */ apply_filters( 'wpmu_signup_user_notification_email', /* translators: New user notification email. %s: Activation URL. */ __( "To activate your user, please click the following link:\n\n%s\n\nAfter you activate, you will receive *another email* with your login." ), $user_login, $user_email, $key, $meta ), site_url( "wp-activate.php?key=$key" ) ); $subject = sprintf( /** * Filters the subject of the notification email of new user signup. * * @since MU (3.0.0) * * @param string $subject Subject of the notification email. * @param string $user_login User login name. * @param string $user_email User email address. * @param string $key Activation key created in wpmu_signup_user(). * @param array $meta Signup meta data. Default empty array. */ apply_filters( 'wpmu_signup_user_notification_subject', /* translators: New user notification email subject. 1: Network title, 2: New user login. */ _x( '[%1$s] Activate %2$s', 'New user notification email subject' ), $user_login, $user_email, $key, $meta ),Introduced in MU (3.0.0). Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/ms-functions.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.