What are the security considerations and measures that should be taken into account when developing a PHP-based cash register system for a kiosk environment?

Security considerations for a PHP-based cash register system in a kiosk environment include protecting sensitive customer data, preventing SQL injection attacks, and securing payment transactions. Measures to address these issues include using parameterized queries to prevent SQL injection, encrypting sensitive data, and implementing secure payment gateways. 

// Example of using parameterized queries to prevent SQL injection
$stmt = $pdo->prepare("SELECT * FROM users WHERE username = :username");
$stmt->bindParam(':username', $username);
$stmt->execute();

Keywords

SQL injection cross-site scripting input validation secure coding practices encryption

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