public function poster($imdbid, $height = 300)
    {
        if (is_null($this->api_key)) {
            return $this->output('400', 'No API Key Found');
        }

        if ($this->validateIMDBid($imdbid) == false) {
            return $this->output('400', 'Invalid IMDB ID provided');
        }

        if (!is_numeric($height)) {
            return $this->output('400', 'Height should be numeric');
        }

        if ($height < 1 && $height > 1000) {
            return $this->output('400', 'Height should be between 1-1000');
        }

        $api_uri = '?i=' . $imdbid . '&h=' . $height . '&apikey=' . $this->api_key;
        $output  = $this->get($api_uri);

        if ($output->code === 200) {
            header("Content-Type: image/jpeg");
            return $output->data;
        }

        return $output;
    }