<?php

declare(strict_types=1);

namespace GuzzleHttp\Psr7;

use Psr\Http\Message\StreamInterface;

/**
 * Converts Guzzle streams into PHP stream resources.
 *
 * @see https://www.php.net/streamwrapper
 */
final class StreamWrapper
{
    /** @var resource */
    public $context;

    /** @var StreamInterface */
    private $stream;

    /** @var string r, r+, or w */
    private $mode;

    /**
     * Returns a resource representing the stream.
     *
     * @param StreamInterface $stream The stream to get a resource for
     *
     * @return resource
     *
     * @throws \InvalidArgumentException if stream is not readable or writable
     */
    public static function getResource(StreamInterface $stream)
    {
        self::register();

        if ($stream->isReadable()) {
            $mode = $stream->isWritable() ? 'r+' : 'r';
        } elseif ($stream->isWritable()) {
            $mode = 'w';
        } else {
            throw new \InvalidArgumentException('The stream must be readable, '
                .'writable, or both.');
        }

        return fopen('guzzle://stream', $mode, false, self::createStreamContext($stream));
    }

    /**
     * Creates a stream context that can be used to open a stream as a php stream resource.
     *
     * @return resource
     */
    public static function createStreamContext(StreamInterface $stream)
    {
        return stream_context_create([
            'guzzle' => ['stream' => $stream],
        ]);
    }

    /**
     * Registers the stream wrapper if needed
     */
    public static function register(): void
    {
        if (!in_array('guzzle', stream_get_wrappers())) {
            stream_wrapper_register('guzzle', __CLASS__);
        }
    }

    public function stream_open(string $path, string $mode, int $options, string &$opened_path = null): bool
    {
        $options = stream_context_get_options($this->context);

        if (!isset($options['guzzle']['stream'])) {
            return false;
        }

        $this->mode = $mode;
        $this->stream = $options['guzzle']['stream'];

        return true;
    }

    public function stream_read(int $count): string
    {
        return $this->stream->read($count);
    }

    public function stream_write(string $data): int
    {
        return $this->stream->write($data);
    }

    public function stream_tell(): int
    {
        return $this->stream->tell();
    }

    public function stream_eof(): bool
    {
        return $this->stream->eof();
    }

    public function stream_seek(int $offset, int $whence): bool
    {
        $this->stream->seek($offset, $whence);

        return true;
    }

    /**
     * @return resource|false
     */
    public function stream_cast(int $cast_as)
    {
        $stream = clone $this->stream;
        $resource = $stream->detach();

        return $resource ?? false;
    }

    /**
     * @return array{
     *   dev: int,
     *   ino: int,
     *   mode: int,
     *   nlink: int,
     *   uid: int,
     *   gid: int,
     *   rdev: int,
     *   size: int,
     *   atime: int,
     *   mtime: int,
     *   ctime: int,
     *   blksize: int,
     *   blocks: int
     * }
     */
    public function stream_stat(): array
    {
        static $modeMap = [
            'r' => 33060,
            'rb' => 33060,
            'r+' => 33206,
            'w' => 33188,
            'wb' => 33188,
        ];

        return [
            'dev' => 0,
            'ino' => 0,
            'mode' => $modeMap[$this->mode],
            'nlink' => 0,
            'uid' => 0,
            'gid' => 0,
            'rdev' => 0,
            'size' => $this->stream->getSize() ?: 0,
            'atime' => 0,
            'mtime' => 0,
            'ctime' => 0,
            'blksize' => 0,
            'blocks' => 0,
        ];
    }

    /**
     * @return array{
     *   dev: int,
     *   ino: int,
     *   mode: int,
     *   nlink: int,
     *   uid: int,
     *   gid: int,
     *   rdev: int,
     *   size: int,
     *   atime: int,
     *   mtime: int,
     *   ctime: int,
     *   blksize: int,
     *   blocks: int
     * }
     */
    public function url_stat(string $path, int $flags): array
    {
        return [
            'dev' => 0,
            'ino' => 0,
            'mode' => 0,
            'nlink' => 0,
            'uid' => 0,
            'gid' => 0,
            'rdev' => 0,
            'size' => 0,
            'atime' => 0,
            'mtime' => 0,
            'ctime' => 0,
            'blksize' => 0,
            'blocks' => 0,
        ];
    }
}

• [D] Exception
• [F] AppendStream.php
  Delete
• [F] BufferStream.php
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• [F] CachingStream.php
  Delete
• [F] DroppingStream.php
  Delete
• [F] FnStream.php
  Delete
• [F] Header.php
  Delete
• [F] HttpFactory.php
  Delete
• [F] InflateStream.php
  Delete
• [F] LazyOpenStream.php
  Delete
• [F] LimitStream.php
  Delete
• [F] Message.php
  Delete
• [F] MessageTrait.php
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• [F] MimeType.php
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• [F] MultipartStream.php
  Delete
• [F] NoSeekStream.php
  Delete
• [F] PumpStream.php
  Delete
• [F] Query.php
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• [F] Request.php
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• [F] Response.php
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• [F] Rfc7230.php
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• [F] ServerRequest.php
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• [F] Stream.php
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• [F] StreamDecoratorTrait.php
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• [F] StreamWrapper.php
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• [F] UploadedFile.php
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• [F] Uri.php
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• [F] UriComparator.php
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• [F] UriNormalizer.php
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• [F] UriResolver.php
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• [F] Utils.php
  Delete

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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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• Payment