What are some best practices for ensuring data anonymity in a PHP form that saves data to a database?

To ensure data anonymity in a PHP form that saves data to a database, it is important to sanitize and hash sensitive information before storing it. This can be done by using PHP functions such as htmlspecialchars() and password_hash(). Additionally, using prepared statements with placeholders can help prevent SQL injection attacks.

// Sanitize and hash sensitive data before storing in the database
$name = htmlspecialchars($_POST['name']);
$email = htmlspecialchars($_POST['email']);
$password = password_hash($_POST['password'], PASSWORD_DEFAULT);

// Prepare SQL statement with placeholders
$stmt = $pdo->prepare("INSERT INTO users (name, email, password) VALUES (:name, :email, :password)");
$stmt->bindParam(':name', $name);
$stmt->bindParam(':email', $email);
$stmt->bindParam(':password', $password);
$stmt->execute();