1. First open web/index.php defined('YII_DEBUG') or define('YII_DEBUG', true); and change this to true; look at the error message:
Exception (Invalid Configuration) 'yii\base\InvalidConfigException' with message 'The directory is not writable by the Web process: /home/wwwroot/1XX.2X.XX3.X2/xhedu/backend/web/assets' in /home/wwwroot/12X.2X.XXX.1X/xhedu/vendor/yiisoft/yii2/web/AssetManager.php:213
2. The assets folder and its file permissions are insufficient, resulting in the inability to access AssetManager.php. Just change it to 777. The name of the owner and group of my previous project is www, and the permissions are the largest. 777; The user name of subsequent projects is root, and the permissions are not the highest. Therefore, you need to change the project assets folder to 777, and it will be fine.
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Yii is a high-performance framework based on PHP, suitable for rapid development of web applications. 1) It adopts MVC architecture and component design to simplify the development process. 2) Yii provides rich functions, such as ActiveRecord, RESTfulAPI, etc., which supports high concurrency and expansion. 3) Using Gii tools can quickly generate CRUD code and improve development efficiency. 4) During debugging, you can check configuration files, use debugging tools and view logs. 5) Performance optimization suggestions include using cache, optimizing database queries and maintaining code readability.

YiiremainspopularbutislessfavoredthanLaravel,withabout14kGitHubstars.ItexcelsinperformanceandActiveRecord,buthasasteeperlearningcurveandasmallerecosystem.It'sidealfordevelopersprioritizingefficiencyoveravastecosystem.

Yii is a high-performance PHP framework that is unique in its componentized architecture, powerful ORM and excellent security. 1. The component-based architecture allows developers to flexibly assemble functions. 2. Powerful ORM simplifies data operation. 3. Built-in multiple security functions to ensure application security.

Yii framework adopts an MVC architecture and enhances its flexibility and scalability through components, modules, etc. 1) The MVC mode divides the application logic into model, view and controller. 2) Yii's MVC implementation uses action refinement request processing. 3) Yii supports modular development and improves code organization and management. 4) Use cache and database query optimization to improve performance.

Strategies to improve Yii2.0 application performance include: 1. Database query optimization, using QueryBuilder and ActiveRecord to select specific fields and limit result sets; 2. Caching strategy, rational use of data, query and page cache; 3. Code-level optimization, reducing object creation and using efficient algorithms. Through these methods, the performance of Yii2.0 applications can be significantly improved.

Developing a RESTful API in the Yii framework can be achieved through the following steps: Defining a controller: Use yii\rest\ActiveController to define a resource controller, such as UserController. Configure authentication: Ensure the security of the API by adding HTTPBearer authentication mechanism. Implement paging and sorting: Use yii\data\ActiveDataProvider to handle complex business logic. Error handling: Configure yii\web\ErrorHandler to customize error responses, such as handling when authentication fails. Performance optimization: Use Yii's caching mechanism to optimize frequently accessed resources and improve API performance.

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.

Theming and Tempting of the Yii framework achieve website style and content generation through theme directories and views and layout files: 1. Theming manages website style and layout by setting theme directories, 2. Tempting generates HTML content through views and layout files, 3. Embed complex UI components using the Widget system, 4. Optimize performance and follow best practices to improve user experience and development efficiency.


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