What are the common mistakes to avoid when using PHP to create a system for managing customer orders and product information?

One common mistake to avoid when using PHP to create a system for managing customer orders and product information is not properly sanitizing user input. This can lead to security vulnerabilities such as 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 sanitize user input
$stmt = $pdo->prepare('SELECT * FROM products WHERE id = :id');
$stmt->bindParam(':id', $_GET['product_id']);
$stmt->execute();
$product = $stmt->fetch();

Keywords

SQL injection data validation session management error handling cross-site scripting

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