用法：
use Endroid\QrCode\QrCode;
$qrCode = new QrCode();
$qrCode
->setText('Life is too short to be generating QR codes')
->setSize(300)
->setPadding(10)
->setErrorCorrection('high')
->setForegroundColor(['r' => 0, 'g' => 0, 'b' => 0, 'a' => 0])
->setBackgroundColor(['r' => 255, 'g' => 255, 'b' => 255, 'a' => 0])
->setLabel('Scan the code')
->setLabelFontSize(16)
->setImageType(QrCode::IMAGE_TYPE_PNG)
;
// now we can directly output the qrcode
header('Content-Type: '.$qrCode->getContentType());
$qrCode->render();
// save it to a file
$qrCode->save('qrcode.png');
// or create a response object
$response = new Response($qrCode->get(), 200, ['Content-Type' => $qrCode->getContentType()]);这个比常用的qrcode类好用多了， 支持定义LOGO， 支持定义前景色背景色等等 最佳答案
