is_super_admin( int|false $user_id = false ): bool

1181function is_super_admin( $user_id = false ) {1182	if ( ! $user_id ) {1183		$user = wp_get_current_user();1184	} else {1185		$user = get_userdata( $user_id );1186	}1187 1188	if ( ! $user || ! $user->exists() ) {1189		return false;1190	}1191 1192	if ( is_multisite() ) {1193		$super_admins = get_super_admins();1194		if ( is_array( $super_admins ) && in_array( $user->user_login, $super_admins, true ) ) {1195			return true;1196		}1197	} elseif ( $user->has_cap( 'delete_users' ) ) {1198		return true;1199	}1200 1201	return false;1202}