Three ways to use widgets in Yii views

Write a custom SQL query in Yii and can be implemented through Yii::$app->db. The steps are as follows: 1. Create a query command using createCommand(); 2. Binding parameters through bindValue() or bindParam() to prevent SQL injection; 3. Call queryAll(), queryOne() and other methods to execute queries; 4. For insert and update operations, you can chain call insert() and update() methods; 5. It is recommended to write SQL directly and bind parameters; 6. If the result needs to be converted into a model, you can instantiate and set properties; 7. Use QueryBuilder to build secure queries first, and replies, and replies.

In Yii, the model is used to process data logic, verify input, represent database table structure, and support business logic and non-database forms. 1. The model defines verification rules through the rules() method to ensure that user input meets the requirements; 2. Use ActiveRecord class to map database tables to realize data addition, deletion, modification and search operations; 3. You can add business methods such as isSubscribed() and behavioral expansion functions such as TimestampBehavior; 4. Supports a form model that does not depend on the database, which is suitable for contact forms, search forms and other scenarios, improving code organization and maintainability.

The steps to create a form using ActiveForm widget in Yii2 are as follows: 1. Create an ActiveForm instance in the view file through ActiveForm::begin() and ActiveForm::end(); 2. Add a form field using $form->field($model,'attribute') and select appropriate input types such as textInput, passwordInput, etc.; 3. Use Html::submitButton() to add a submission button and make sure that the model defines verification rules for automatic verification; 4. You can wrap fields, custom templates, or integrate CSS frameworks such as Bo

In Yii, widgets are used to implement component multiplexing by encapsulating complex view logic. 1. Use the widget() method to call built-in widgets, such as LinkPager for pagination, and ActiveForm for creating model binding forms; 2. Common widgets include GridView to display table data, DetailView to display model details, and Menu build navigation menu; 3. Custom widgets can be created by inheriting yii\base\Widget, implementing the run() method and defining attributes to enhance reusability, as shown in the HelloWidget example. Mastering these core methods can improve view development efficiency.

The steps to create a module in the Yii framework are as follows: 1. Create the module root directory and build a structure in the modules directory, including controllers, views and module class files; 2. Write module classes inherited from CWebModule as entry points; 3. Add controller and view files and ensure consistent naming; 4. Register modules in the main configuration file. The module structure must include controller, view and module classes. The module class needs to implement the init method. The controller and view are used to process requests and display pages. Finally, the module takes effect through configuration, pay attention to paths and naming specifications to avoid errors.

In Yii, Layout is a template for wrapping view contents, which is used to maintain a consistent appearance and structure between multiple pages. It is a PHP file containing the complete HTML structure, usually contains, etc. tags, and pass

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TopreventSQLinjectioninYii,usebuilt-intoolslikeActiveRecordandQueryBuildertosafelyhandledatabaseinteractions.1.PreferActiveRecordorQueryBuilderoverrawqueriestoautomaticallyescapeinputs.2.Alwaysuseparameterizedqueriesandavoidconcatenatinguserinputinto