copyToString example

public function __construct(callable $source, array $options = [])
    {
        $this->source = $source;
        $this->size = $options['size'] ?? null;
        $this->metadata = $options['metadata'] ?? [];
        $this->buffer = new BufferStream();
    }

    public function __toString(): string
    {
        try {
            return Utils::copyToString($this);
        } catch (\Throwable $e) {
            if (\PHP_VERSION_ID >= 70400) {
                throw $e;
            }
            trigger_error(sprintf('%s::__toString exception: %s', self::class, (string) $e), E_USER_ERROR);

            return '';
        }
    }

    public function close(): void
    {

if (\PHP_VERSION_ID >= 70400) {
                throw $e;
            }
            trigger_error(sprintf('%s::__toString exception: %s', self::class, (string) $e), E_USER_ERROR);

            return '';
        }
    }

    public function getContents(): string
    {
        return Utils::copyToString($this);
    }

    /** * Allow decorators to implement custom methods * * @return mixed */
    public function __call(string $method, array $args)
    {
        /** @var callable $callable */
        $callable = [$this->stream, $method];
        

// The stream is only seekable if all streams are seekable         if (!$stream->isSeekable()) {
            $this->seekable = false;
        }

        $this->streams[] = $stream;
    }

    public function getContents(): string
    {
        return Utils::copyToString($this);
    }

    /** * Closes each attached stream. */
    public function close(): void
    {
        $this->pos = $this->current = 0;
        $this->seekable = true;

        foreach ($this->streams as $stream) {