What potential pitfalls should be considered when implementing separate sessions for different user roles in PHP, such as the risk of conflicting session IDs?

When implementing separate sessions for different user roles in PHP, one potential pitfall to consider is the risk of conflicting session IDs. To avoid this issue, you can prefix the session name with a unique identifier for each user role. This ensures that each user role has its own distinct set of session variables.

// Set unique session name for each user role
if($user_role == 'admin'){
    session_name('admin_session');
} elseif($user_role == 'user'){
    session_name('user_session');
}

// Start the session
session_start();