How to handle errors in Yii?

@denis 

Yii is a high-performance PHP framework that provides various error handling mechanisms to help developers effectively handle errors in their applications. Here are some ways to handle errors in Yii:

1. Logging Errors: Yii has a built-in logging mechanism that allows developers to log errors to files, emails, and databases. Logging errors helps developers to identify the source of the error, which can help them to fix the problem quickly.
2. Displaying Errors: Yii also provides a default error handler that displays errors to end-users. By default, Yii displays the error message, error code, and a stack trace. This can be useful during development and debugging, but it's important to disable this feature in production environments.
3. Custom Error Pages: Yii allows developers to customize error pages to improve the user experience. Custom error pages can provide users with more meaningful error messages and help them to navigate back to the application.
4. Error Handling Events: Yii provides various events that developers can use to handle errors. For example, the onError event is triggered when an error occurs. Developers can register a callback function to this event and perform custom error handling.
5. Debugging Toolbar: Yii provides a debugging toolbar that can help developers quickly identify and fix errors. The toolbar displays useful information such as SQL queries, request and response data, and profiling data.

In summary, Yii provides various error handling mechanisms that developers can use to effectively handle errors in their applications. By using these mechanisms, developers can identify and fix errors quickly, which can help to improve the overall quality and reliability of their applications.