1、通过composer加载
php composer.phar require "2amigos/yii2-qrcode-helper" "*"
或者添加
"2amigos/yii2-qrcode-helper" : "*"
到对应项目的composer.json文件中。
(推荐教程:yii框架)
2、编辑/vendor/yiisoft/extensions.php,添加以下代码到数组中
'2amigos/yii2-qrcode-helper' => array ( 'name' => '2amigos/yii2-qrcode-helper', 'version' => '1.0.2.0', 'alias' => array ( '@dosamigos/qrcode' => $vendorDir . '/2amigos/yii2-qrcode-helper/src', ), ),
3、在你的控制器中添加以下代码
use dosamigos\qrcode\QrCode; //引入类 \\ ... public function actionQrcode() { return QrCode::png('http://www.yii-china.com'); //调用二维码生成方法 } public function actionDemo() { return $this->render('index'); }
在你的页面中添加以下代码 (demo/index)
<img src="/static/imghwm/default1.png" data-src="<?= Url::to(['index/qrcode'])? alt="How to generate QR code in yii2" >" class="lazy" />
访问demo这个方法就能看到一张漂亮的二维码了。
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In the Yii framework, components are reusable objects, and extensions are plugins added through Composer. 1. Components are instantiated through configuration files or code, and use dependency injection containers to improve flexibility and testability. 2. Expand the management through Composer to quickly enhance application functions. Using these tools can improve development efficiency and application performance.

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When preparing for an interview with Yii framework, you need to know the following key knowledge points: 1. MVC architecture: Understand the collaborative work of models, views and controllers. 2. ActiveRecord: Master the use of ORM tools and simplify database operations. 3. Widgets and Helpers: Familiar with built-in components and helper functions, and quickly build the user interface. Mastering these core concepts and best practices will help you stand out in the interview.

Advanced ActiveRecord and migration tools in the Yii framework are the key to efficiently managing databases. 1) Advanced ActiveRecord supports complex queries and data operations, such as associated queries and batch updates. 2) The migration tool is used to manage database structure changes and ensure secure updates to the schema.


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