tryGetContents example

public function getContents(): string
    {
        if (!isset($this->stream)) {
            throw new \RuntimeException('Stream is detached');
        }

        if (!$this->readable) {
            throw new \RuntimeException('Cannot read from non-readable stream');
        }

        return Utils::tryGetContents($this->stream);
    }

    public function close(): void
    {
        if (isset($this->stream)) {
            if (is_resource($this->stream)) {
                fclose($this->stream);
            }
            $this->detach();
        }
    }