How does PHP generate QR code?

composer require endroid/qr-code

$label Is the QR code description text , Below QR code

This library can help you quickly generate QR code . Use bacon/bacon-qr-code Generate matrix , Use khanamiryan/qrcode-detector-decoder Verify the generated QR code . Further expanded Twig Expand 、 Generate route 、 Factories and Symfony Bundles , To facilitate installation and configuration . Different writers are provided to generate PNG、SVG、EPS Or binary format QR code .

       $code = input('code');

        $writer = new PngWriter();

        $qrCode = QrCode::create($code)
            ->setEncoding(new Encoding('UTF-8'))
            ->setErrorCorrectionLevel(new ErrorCorrectionLevelLow())
            ->setSize(500)
            ->setMargin(10)
            ->setRoundBlockSizeMode(new RoundBlockSizeModeMargin())
            ->setForegroundColor(new Color(0, 0, 0))
            ->setBackgroundColor(new Color(255, 255, 255));

        $label = Label::create($code)
            ->setMargin(new Margin(20, 0, 20, 0))
            ->setTextColor(new Color(0, 0, 0));

        $result = $writer->write($qrCode, null, $label);
        $content =   $result->getString();
        $res = Response::create($content,Image::class);
        return $res;

ThinkPHP6 Output QR code picture format Solution and Debug The conflict of