Are there any specific coding conventions or standards that PHP developers should adhere to when working with session variables and user authentication?

When working with session variables and user authentication in PHP, it is important to follow certain coding conventions and standards to ensure security and maintainability. One common practice is to always regenerate the session ID after a successful login to prevent session fixation attacks. Additionally, developers should sanitize and validate user input before storing it in session variables to prevent injection attacks.

// Regenerate session ID after successful login
session_regenerate_id();

// Sanitize and validate user input before storing in session
$_SESSION['username'] = filter_var($_POST['username'], FILTER_SANITIZE_STRING);
$_SESSION['email'] = filter_var($_POST['email'], FILTER_VALIDATE_EMAIL);