How can PHP developers efficiently track user activity to maintain accurate online status without causing excessive traffic?

To efficiently track user activity and maintain accurate online status without causing excessive traffic, PHP developers can implement a system where the server updates the user's last activity timestamp at regular intervals. By checking this timestamp, the server can determine if the user is online or not without constantly querying the database. This approach reduces unnecessary database queries and network traffic. 

// Update user's last activity timestamp
function updateLastActivity($user_id) {
    $current_time = time();
    // Update last activity timestamp in the database for the user
    // Example SQL query: UPDATE users SET last_activity = $current_time WHERE user_id = $user_id
}

// Check if user is online based on last activity timestamp
function isUserOnline($user_id, $timeout = 300) {
    $last_activity = // Retrieve last activity timestamp from the database for the user
    $current_time = time();
    
    if (($current_time - $last_activity) <= $timeout) {
        return true; // User is online
    } else {
        return false; // User is offline
    }
}

Keywords

PHP user activity tracking online status traffic optimization real-time monitoring

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