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<?php declare(strict_types=1); namespace GuzzleHttp\Psr7; use Psr\Http\Message\ResponseInterface; use Psr\Http\Message\StreamInterface; /** * PSR-7 response implementation. */ class Response implements ResponseInterface { use MessageTrait; /** Map of standard HTTP status code/reason phrases */ private const PHRASES = [ 100 => 'Continue', 101 => 'Switching Protocols', 102 => 'Processing', 200 => 'OK', 201 => 'Created', 202 => 'Accepted', 203 => 'Non-Authoritative Information', 204 => 'No Content', 205 => 'Reset Content', 206 => 'Partial Content', 207 => 'Multi-status', 208 => 'Already Reported', 300 => 'Multiple Choices', 301 => 'Moved Permanently', 302 => 'Found', 303 => 'See Other', 304 => 'Not Modified', 305 => 'Use Proxy', 306 => 'Switch Proxy', 307 => 'Temporary Redirect', 308 => 'Permanent Redirect', 400 => 'Bad Request', 401 => 'Unauthorized', 402 => 'Payment Required', 403 => 'Forbidden', 404 => 'Not Found', 405 => 'Method Not Allowed', 406 => 'Not Acceptable', 407 => 'Proxy Authentication Required', 408 => 'Request Time-out', 409 => 'Conflict', 410 => 'Gone', 411 => 'Length Required', 412 => 'Precondition Failed', 413 => 'Request Entity Too Large', 414 => 'Request-URI Too Large', 415 => 'Unsupported Media Type', 416 => 'Requested range not satisfiable', 417 => 'Expectation Failed', 418 => 'I\'m a teapot', 422 => 'Unprocessable Entity', 423 => 'Locked', 424 => 'Failed Dependency', 425 => 'Unordered Collection', 426 => 'Upgrade Required', 428 => 'Precondition Required', 429 => 'Too Many Requests', 431 => 'Request Header Fields Too Large', 451 => 'Unavailable For Legal Reasons', 500 => 'Internal Server Error', 501 => 'Not Implemented', 502 => 'Bad Gateway', 503 => 'Service Unavailable', 504 => 'Gateway Time-out', 505 => 'HTTP Version not supported', 506 => 'Variant Also Negotiates', 507 => 'Insufficient Storage', 508 => 'Loop Detected', 510 => 'Not Extended', 511 => 'Network Authentication Required', ]; /** @var string */ private $reasonPhrase; /** @var int */ private $statusCode; /** * @param int $status Status code * @param (string|string[])[] $headers Response headers * @param string|resource|StreamInterface|null $body Response body * @param string $version Protocol version * @param string|null $reason Reason phrase (when empty a default will be used based on the status code) */ public function __construct( int $status = 200, array $headers = [], $body = null, string $version = '1.1', string $reason = null ) { $this->assertStatusCodeRange($status); $this->statusCode = $status; if ($body !== '' && $body !== null) { $this->stream = Utils::streamFor($body); } $this->setHeaders($headers); if ($reason == '' && isset(self::PHRASES[$this->statusCode])) { $this->reasonPhrase = self::PHRASES[$this->statusCode]; } else { $this->reasonPhrase = (string) $reason; } $this->protocol = $version; } public function getStatusCode(): int { return $this->statusCode; } public function getReasonPhrase(): string { return $this->reasonPhrase; } public function withStatus($code, $reasonPhrase = ''): ResponseInterface { $this->assertStatusCodeIsInteger($code); $code = (int) $code; $this->assertStatusCodeRange($code); $new = clone $this; $new->statusCode = $code; if ($reasonPhrase == '' && isset(self::PHRASES[$new->statusCode])) { $reasonPhrase = self::PHRASES[$new->statusCode]; } $new->reasonPhrase = (string) $reasonPhrase; return $new; } /** * @param mixed $statusCode */ private function assertStatusCodeIsInteger($statusCode): void { if (filter_var($statusCode, FILTER_VALIDATE_INT) === false) { throw new \InvalidArgumentException('Status code must be an integer value.'); } } private function assertStatusCodeRange(int $statusCode): void { if ($statusCode < 100 || $statusCode >= 600) { throw new \InvalidArgumentException('Status code must be an integer value between 1xx and 5xx.'); } } }

Enhancing Payment Security: The Role of Encryption and Tokenization in Digital Transactions

As digital transactions proliferate, ensuring robust payment security is more critical than ever. Two foundational technologies that are pivotal in this effort are encryption and tokenization.
Encryption is a process that transforms data into a secure format, known as ciphertext, which can only be deciphered using a specific decryption key. This means that even if data is intercepted during transmission, it remains unreadable and protected from unauthorized access. Encryption is essential in safeguarding sensitive payment information, such as credit card details and personal data, during online transactions.
Tokenization, on the other hand, involves substituting sensitive data with unique identifiers or "tokens." These tokens serve as placeholders and have no value outside of the specific transaction context. If intercepted, tokens are meaningless and cannot be used to access the original sensitive data. This method significantly reduces the risk of fraud and data breaches, as the actual payment information is not stored or transmitted.
Together, encryption and tokenization form a powerful security framework. Encryption ensures that data is protected during transmission, while tokenization minimizes the risk of exposing sensitive information by replacing it with secure, non-sensitive tokens.
These technologies are integral to modern payment platforms, providing a robust defense against cyber threats. By implementing advanced encryption and tokenization techniques, businesses can enhance the security of digital transactions, ensuring that users' financial and personal information remains safe. This comprehensive approach not only builds user trust but also fortifies the overall security infrastructure of digital payment systems. As cyber threats evolve, the continued advancement of encryption and tokenization will be crucial in maintaining secure and reliable payment processes.

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