What potential pitfalls should be considered when implementing a newsletter subscription feature in PHP?

One potential pitfall to consider when implementing a newsletter subscription feature in PHP is the risk of SQL injection attacks if user input is not properly sanitized. To mitigate this risk, always use prepared statements when interacting with the database to prevent malicious SQL queries. 

// Using prepared statements to prevent SQL injection

// Assuming $email contains the user input for the email address
$stmt = $pdo->prepare("INSERT INTO newsletter_subscribers (email) VALUES (:email)");
$stmt->bindParam(':email', $email);
$stmt->execute();

Keywords

SQL injection form validation email delivery CSRF protection database schema

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