composer require endroid/qr-code

基礎版本：

use EndroidQrCodeQrCode;

$qrCode = new QrCode('http://m.dgkbdq.com');

header('Content-Type: '.$qrCode->getContentType());
echo $qrCode->writeString();
exit;

加logo

$set_log =true;
        $qrCode = new QrCode('http://m.dgkbdq.com.cn');
        if($set_log ==true){
            $qrCode->setLogoPath('thumb/link.jpg');
            $qrCode->setLogoWidth(90);
        }
        $qrCode->setErrorCorrectionLevel(ErrorCorrectionLevel::HIGH);
        $name = rand(1,99999999).time();
        $path ='static/qrcode/'.$name.'.png';
        $qrCode->writeFile($path);
        header('Content-Type: '.$qrCode->getContentType());
        echo $qrCode->writeString();
        //@去操作這張圖片
        //@刪除文件
        unlink($path);
        exit;