What are some common pitfalls to avoid when implementing a guestbook functionality in PHP?

One common pitfall to avoid when implementing a guestbook functionality in PHP is not properly sanitizing user input, which can leave your application vulnerable to SQL injection attacks. To prevent this, always use prepared statements when interacting with your database to ensure that user input is properly escaped. 

// Using prepared statements to prevent SQL injection
$stmt = $pdo->prepare("INSERT INTO guestbook (name, message) VALUES (:name, :message)");
$stmt->bindParam(':name', $name);
$stmt->bindParam(':message', $message);
$stmt->execute();

Keywords

SQL injection form validation XSS attacks CSRF protection input sanitization

Related Questions