What potential pitfalls should be considered when handling session arrays in PHP forms for email communication?

One potential pitfall when handling session arrays in PHP forms for email communication is the risk of sensitive data being exposed if the session is not properly secured. To mitigate this risk, it is important to sanitize and validate user input before storing it in session variables. Additionally, using encryption techniques like hashing sensitive data before storing it can add an extra layer of security. 

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

// Hash sensitive data before storing in session
$_SESSION['password'] = password_hash($_POST['password'], PASSWORD_DEFAULT);

Keywords

session arrays PHP forms email communication security vulnerabilities data validation

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