How can PHP beginners ensure the security and privacy of subscriber email addresses in a newsletter system?

To ensure the security and privacy of subscriber email addresses in a newsletter system, PHP beginners can encrypt the email addresses before storing them in the database. This can be achieved by using PHP's built-in encryption functions like password_hash() or openssl_encrypt(). Additionally, it's important to sanitize user input to prevent SQL injection attacks and implement proper access controls to restrict unauthorized access to the database. 

// Encrypt the email address before storing it in the database
$email = 'subscriber@example.com';
$encrypted_email = openssl_encrypt($email, 'AES-256-CBC', 'secret_key', 0, '16chariv');
// Store $encrypted_email in the database

// Sanitize user input to prevent SQL injection
$email = mysqli_real_escape_string($conn, $_POST['email']);

// Implement access controls to restrict unauthorized access to the database
// For example, check if the user is authenticated before allowing access to subscriber email addresses
if ($_SESSION['authenticated']) {
    // Retrieve and display subscriber email addresses
} else {
    echo 'Unauthorized access';
}

Keywords

PHP security privacy subscriber email addresses newsletter system

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