What are some common methods to track user activity and online status in PHP applications?

To track user activity and online status in PHP applications, you can use session variables or database entries to store user activity timestamps. By updating these timestamps regularly, you can determine if a user is currently active or online based on their last activity time. 

// Start session
session_start();

// Update user activity timestamp
$_SESSION['last_activity'] = time();

// Check if user is online based on last activity time
$online_threshold = 60; // 1 minute
if (isset($_SESSION['last_activity']) && (time() - $_SESSION['last_activity']) < $online_threshold) {
    echo "User is online";
} else {
    echo "User is offline";
}

Keywords

User activity tracking Online status tracking PHP sessions AJAX requests Real-time updates

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