What are the best practices for handling user sessions and tracking thread visits in a PHP forum environment?

Issue: In a PHP forum environment, it is important to handle user sessions securely and accurately track thread visits to provide a personalized experience for users. 

// Start or resume a session
session_start();

// Track thread visits
if(isset($_SESSION['visited_threads'])) {
    if(!in_array($thread_id, $_SESSION['visited_threads'])) {
        $_SESSION['visited_threads'][] = $thread_id;
    }
} else {
    $_SESSION['visited_threads'] = array($thread_id);
}

Keywords

sessions tracking user authentication PHP forum thread visits

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