What potential pitfalls should be avoided when implementing a shopping cart feature in PHP?

One potential pitfall when implementing a shopping cart feature in PHP is not properly sanitizing user input, which can lead to security vulnerabilities such as SQL injection attacks. To avoid this, always use prepared statements or parameterized queries when interacting with the database to prevent malicious input from being executed as SQL code. 

// Using prepared statements to sanitize user input
$stmt = $pdo->prepare("SELECT * FROM products WHERE id = :id");
$stmt->bindParam(':id', $productId);
$stmt->execute();
$product = $stmt->fetch();

Keywords

SQL injection XSS attacks session management data validation CSRF protection

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