What are some best practices for building a custom PHP payment form system?

When building a custom PHP payment form system, it is important to follow best practices to ensure security and reliability. Some key practices include using HTTPS to encrypt data, validating input to prevent injection attacks, and securely storing sensitive information. Additionally, implementing a tokenization system can help reduce PCI compliance requirements. 

// Sample PHP code for building a custom payment form system

// Ensure the page is accessed over HTTPS
if($_SERVER["HTTPS"] != "on") {
  header("Location: https://" . $_SERVER["HTTP_HOST"] . $_SERVER["REQUEST_URI"]);
  exit();
}

// Validate user input to prevent SQL injection
$username = mysqli_real_escape_string($conn, $_POST['username']);
$password = mysqli_real_escape_string($conn, $_POST['password']);

// Securely store sensitive information
$encrypted_card_number = encrypt($_POST['card_number']);

// Implement tokenization system
$token = generate_token();
store_token($token, $encrypted_card_number);

Keywords

payment form PHP custom best practices security

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