MatthiasMullie\Scrapbook\Adapters\Flysystem::add PHP Method

    public function add($key, $value, $expire = 0)
    {
        if (!$this->lock($key)) {
            return false;
        }
        if ($this->exists($key)) {
            $this->unlock($key);
            return false;
        }
        $path = $this->path($key);
        $data = $this->wrap($value, $expire);
        try {
            $success = $this->filesystem->write($path, $data);
            return $success && $this->unlock($key);
        } catch (FileExistsException $e) {
            $this->unlock($key);
            return false;
        }
    }