How can you track and display the number of users currently logged in on a PHP website?

To track and display the number of users currently logged in on a PHP website, you can use sessions to keep track of active users. Each time a user logs in, you can store their session ID in a database or a file. Then, you can query the database or count the number of session files to get the total number of active users. 

// Start the session
session_start();

// Store the user's session ID in a database or file upon login
$_SESSION['user_id'] = $user_id;

// Query the database or count session files to get the total number of active users
// For example, to count the number of active sessions:
$active_users = count(glob(session_save_path() . '/*'));

// Display the number of active users
echo "Active Users: " . $active_users;

Keywords

PHP session management online users tracking display

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