YII2 生成二维码

扩展

1. 2amigos/qrcode-library

https://qrcode-library.readthedocs.io/en/latest

// in components config of Yii2 app

'components' => [
// ... 
    'qr' => [
        'class' => 'DaQrCodeComponentQrCodeComponent',
        // ... you can configure more properties of the component here
    ]
// ...
]


// on your controller's action 
输出到浏览器

$qr = Yii::$app->get('qr');

Yii::$app->response->format = Response::FORMAT_RAW;
Yii::$app->response->headers->add('Content-Type', $qr->getContentType());

return $qr
    ->setText('https://2amigos.us')
    ->setLabel('2amigos consulting group llc')
    ->writeString();

保存二维码 

$qr->setText('https://2amigos.us')->writeFile(路径);//路径一定要有效 否则报内容空，会让你觉得二维码没写入内容

直接调用

 $qr = (new DaQrCodeQrcode($url))->setSize(250)->setMargin(5);
// 把图片保存到文件中:
$qr->writeFile('路径');

　　

2.phpqrcode 

http://phpqrcode.sourceforge.net/