wp-admin/includes/user.php:613$textstringstringfunction admin_created_user_email( $text ) { $roles = get_editable_roles(); $role = $roles[ $_REQUEST['role'] ]; if ( '' !== get_bloginfo( 'name' ) ) { $site_title = wp_specialchars_decode( get_bloginfo( 'name' ), ENT_QUOTES ); } else { $site_title = parse_url( home_url(), PHP_URL_HOST ); } return sprintf( /* translators: 1: Site title, 2: Site URL, 3: User role. */ __( 'Hi,You\'ve been invited to join \'%1$s\' at%2$s with the role of %3$s.If you do not want to join this site please ignorethis email. This invitation will expire in a few days. Please click the following link to activate your user account:%%s' ), $site_title, home_url(), wp_specialchars_decode( translate_user_role( $role['name'] ) ) );}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-admin/includes/user.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.