Is it possible to create a function in PHP to check if a session exists and accurately track user activity in real-time?

To check if a session exists and accurately track user activity in real-time, you can create a function in PHP that checks if a session is active and updates a timestamp in the session data to track user activity. This function can be called on each page load to ensure the session is active and update the timestamp accordingly. 

<?php

// Function to check if a session exists and update user activity timestamp
function trackUserActivity() {
    session_start();
    
    // Check if session exists
    if(isset($_SESSION['user_id'])) {
        // Update user activity timestamp
        $_SESSION['last_activity'] = time();
    }
}

// Call the function on each page load
trackUserActivity();

?>

Keywords

PHP session function real-time tracking user activity

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