WordPress.org

You can either install it automatically from the WordPress admin, or do it manually:

1. Unzip the archive and put the wp-useronline folder into your plugins folder (/wp-content/plugins/).
2. Activate the plugin from the Plugins menu.

Usage

General Usage (With Widget)

1. Go to WP-Admin -> Appearance -> Widgets
2. The widget name is UserOnline.
3. Scroll down for instructions on how to create a UserOnline Page.

General Usage (Without Widget)

Open wp-content/themes/<YOUR THEME NAME>/sidebar.php and add Anywhere:

<?php if (function_exists('users_online')): ?>
    <p>Users online: <div id="useronline-count"><?php users_online(); ?></div></p>
<?php endif; ?>

UserOnline Page

1. Go to WP-Admin -> Pages -> Add New
2. Type any title you like in the post's title area
3. If you ARE using nice permalinks, after typing the title, WordPress will generate the permalink to the page. You will see an 'Edit' link just beside the permalink.
4. Click 'Edit' and type in useronline in the text field and click 'Save'.
5. Type [page_useronline] in the post's content area
6. Click 'Publish'

If you ARE NOT using nice permalinks, you need to go to WP-Admin -> Settings -> UserOnline and under 'UserOnline URL', you need to fill in the URL to the UserOnline Page you created above.

UserOnline Stats (Outside WP Loop)

To Display Most Number Of Users Online use:

<?php if (function_exists('get_most_users_online')): ?>
   <p>Most Users Ever Online Is <?php echo get_most_users_online(); ?> On <?php echo get_most_users_online_date(); ?></p>
<?php endif; ?>

To Display Users Browsing Site use:

<?php if (function_exists('get_users_browsing_site')): ?>
   <div id="useronline-browsing-site"><?php echo get_users_browsing_site(); ?></div>
<?php endif; ?>

To Display Users Browsing A Page use:

<?php if (function_exists('get_users_browsing_page')): ?>
   <div id="useronline-browsing-page"><?php echo get_users_browsing_page(); ?></div>
<?php endif; ?>