What role does including language files play in the context of session management in PHP, based on the code snippets shared in the forum thread?

Including language files in the context of session management in PHP allows for the localization of session messages and prompts. By including language files, developers can easily switch between different languages for session messages without modifying the core code. This helps in creating a more user-friendly and customizable session management system.

// Include language file based on user's language preference
if(isset($_SESSION['language'])) {
    include 'languages/' . $_SESSION['language'] . '.php';
} else {
    include 'languages/english.php'; // Default language
}

// Example language file content (english.php)
$lang['session_expired'] = 'Your session has expired. Please log in again.';
$lang['login_success'] = 'Login successful. Welcome back!';