tryFopen example

    // Mock the resource fetcher so that it will return our fake resource.     $resource_fetcher = $this->prophesize(ResourceFetcherInterface::class);
    $resource_fetcher->fetchResource(Argument::any())
      ->willReturn($resource);
    $this->container->set('media.oembed.resource_fetcher', $resource_fetcher->reveal());

    // The source plugin will try to fetch the remote thumbnail, so mock the     // HTTP client to ensure that request returns a response with some valid     // image data.     $data = Utils::tryFopen($this->getDrupalRoot() . '/core/misc/druplicon.png', 'r');
    $response = new Response(200, $thumbnail_headers, Utils::streamFor($data));
    $handler = new MockHandler([$response]);
    $client = new Client([
      'handler' => new HandlerStack($handler),
    ]);
    $this->container->set('http_client', $client);

    $media_type = $this->createMediaType('oembed:video');
    $source = $media_type->getSource();

    // Add some HTML to the global site slogan, and use the site:slogan token in

/** * We will treat the buffer object as the body of the stream * * @param StreamInterface $stream Stream to cache. The cursor is assumed to be at the beginning of the stream. * @param StreamInterface $target Optionally specify where data is cached */
    public function __construct(
        StreamInterface $stream,
        StreamInterface $target = null
    ) {
        $this->remoteStream = $stream;
        $this->stream = $target ?: new Stream(Utils::tryFopen('php://temp', 'r+'));
    }

    public function getSize(): ?int
    {
        $remoteSize = $this->remoteStream->getSize();

        if (null === $remoteSize) {
            return null;
        }

        return max($this->stream->getSize(), $remoteSize);
    }

// unsetting the property forces the first access to go through         // __get().         unset($this->stream);
    }

    /** * Creates the underlying stream lazily when required. */
    protected function createStream(): StreamInterface
    {
        return Utils::streamFor(Utils::tryFopen($this->filename, $this->mode));
    }
}

$this->invokeStats($options, $request, $startTime, $response, null);

        return new FulfilledPromise($response);
    }

    private function createSink(StreamInterface $stream, array $options): StreamInterface
    {
        if (!empty($options['stream'])) {
            return $stream;
        }

        $sink = $options['sink'] ?? Psr7\Utils::tryFopen('php://temp', 'r+');

        return \is_string($sink) ? new Psr7\LazyOpenStream($sink, 'w+') : Psr7\Utils::streamFor($sink);
    }

    /** * @param resource $stream */
    private function checkDecode(array $options, array $headers, $stream): array
    {
        // Automatically decode responses when instructed.         if (!empty($options['decode_content'])) {
            

    public static function streamFor($resource = '', array $options = []): StreamInterface
    {
        if (is_scalar($resource)) {
            $stream = self::tryFopen('php://temp', 'r+');
            if ($resource !== '') {
                fwrite($stream, (string) $resource);
                fseek($stream, 0);
            }

            return new Stream($stream, $options);
        }

        switch (gettype($resource)) {
            case 'resource':
                /* * The 'php://input' is a special stream with quirks and inconsistencies. * We avoid using that stream by reading it into php://temp */

return new UploadedFile($stream, $size, $error, $clientFilename, $clientMediaType);
    }

    public function createStream(string $content = ''): StreamInterface
    {
        return Utils::streamFor($content);
    }

    public function createStreamFromFile(string $file, string $mode = 'r'): StreamInterface
    {
        try {
            $resource = Utils::tryFopen($file, $mode);
        } catch (\RuntimeException $e) {
            if ('' === $mode || false === \in_array($mode[0], ['r', 'w', 'a', 'x', 'c'], true)) {
                throw new \InvalidArgumentException(sprintf('Invalid file opening mode "%s"', $mode), 0, $e);
            }

            throw $e;
        }

        return Utils::streamFor($resource);
    }

    

// The empty string enables all available decoders and implicitly                 // sets a matching 'Accept-Encoding' header.                 $conf[\CURLOPT_ENCODING] = '';
                // But as the user did not specify any acceptable encodings we need                 // to overwrite this implicit header with an empty one.                 $conf[\CURLOPT_HTTPHEADER][] = 'Accept-Encoding:';
            }
        }

        if (!isset($options['sink'])) {
            // Use a default temp stream if no sink was set.             $options['sink'] = \GuzzleHttp\Psr7\Utils::tryFopen('php://temp', 'w+');
        }
        $sink = $options['sink'];
        if (!\is_string($sink)) {
            $sink = \GuzzleHttp\Psr7\Utils::streamFor($sink);
        } elseif (!\is_dir(\dirname($sink))) {
            // Ensure that the directory exists before failing in curl.             throw new \RuntimeException(\sprintf('Directory %s does not exist for sink value of %s', \dirname($sink), $sink));
        } else {
            $sink = new LazyOpenStream($sink, 'w+');
        }
        $easy->sink = $sink;
        

    public static function debugResource($value = null)
    {
        if (\is_resource($value)) {
            return $value;
        }
        if (\defined('STDOUT')) {
            return \STDOUT;
        }

        return \GuzzleHttp\Psr7\Utils::tryFopen('php://output', 'w');
    }

    /** * Chooses and creates a default handler to use based on the environment. * * The returned handler is not wrapped by any default middlewares. * * @return callable(\Psr\Http\Message\RequestInterface, array): \GuzzleHttp\Promise\PromiseInterface Returns the best handler for the given system. * * @throws \RuntimeException if no viable Handler is available. */