createStreamContext example

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],
        ]);