Add Online Status Indicate to User Screen in WordPress

functions.php

// From ChatGPT on 8/29/2025 but updated 8/30/2025

// Check if an admin has an active session
function rtd_is_admin_online($user_id) {
    if (!user_can($user_id, 'administrator')) {
        return false;
    }

    if (!class_exists('WP_Session_Tokens')) {
        return false; // safety check
    }

    // Get this user's sessions
    $sessions = WP_Session_Tokens::get_instance($user_id);
    $all_sessions = $sessions->get_all();

    // Online if there is at least one active session
    return !empty($all_sessions);
}

// Add "Online Status" column to Users list
add_filter('manage_users_columns', function($columns) {
    $columns['online_status'] = 'Online Status';
    return $columns;
});

// Populate the "Online Status" column
add_filter('manage_users_custom_column', function($value, $column_name, $user_id) {
    if ($column_name === 'online_status') {
        return rtd_is_admin_online($user_id)
            ? '<span style="color:green;font-weight:bold;">● Online</span>'
            : '<span style="color:gray;">● Offline</span>';
    }
    return $value;
}, 10, 3);