ThinkAdmin: генерация двумерного кода

namespace app\ucserver\controller\api;

use Endroid\QrCode\QrCode;

class Tools extends Controller {
    public function card_code() {
        $this->info['path'] = '/ucserver/api.Tools/qrcode';
        $this->info = json_encode($this->info,JSON_UNESCAPED_UNICODE);
        $this->fetch();
    }

    /**
     * Генерирует двумерный код
     * @param string
     */
    public function qrcode($data = '') {
        $qrCode = new QrCode();
        $qrCode
            ->setText($data)
            ->setSize(300)
            ->setPadding(10)
            ->setErrorCorrection('high')
            ->setForegroundColor(['r' => 0, 'g' => 0, 'b' => 0, 'a' => 0])
            ->setBackgroundColor(['r' => 255, 'g' => 255, 'b' => 255, 'a' => 0])
            ->setLabel('')
            ->setLabelFontSize(16)
            ->setImageType(QrCode::IMAGE_TYPE_PNG);
        header('Content-Type: '.$qrCode->getContentType());//вывод на страницу
        $qrCode->render();
        die;
    }
}