What are some common pitfalls to avoid when creating a slideshow with PHP?

One common pitfall to avoid when creating a slideshow with 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 a database to ensure that user input is properly escaped.

// Example of using prepared statements to prevent SQL injection
$stmt = $pdo->prepare('SELECT * FROM slideshow WHERE id = :id');
$stmt->execute(['id' => $_GET['id']]);
$result = $stmt->fetch();