How to debug Yii applications?

@deron 

1. Enable Debugging: Yii framework has a built-in debugging feature, which can be used to debug code. The debug mode can be enabled in the configuration file by setting the 'YII_DEBUG' constant to true.
2. Use Print Statements: Print statements can be used to output the values of variables and arrays in the application code. This can help to identify the source of errors by identifying the state of the application at that point in time.
3. Use Yii’s Logging Feature: Yii framework has a built-in logging feature that can be used to log messages in the application. This feature allows developers to track the flow of the application and identify errors that occur during runtime.
4. Use Xdebug: Xdebug is a debugging extension for PHP that provides debugging and profiling capabilities for PHP scripts. While Yii provides a good debugging feature, Xdebug can be used to further enhance the debugging capabilities of Yii applications.
5. Use browser extensions: There are several browser extensions available for debugging JavaScript. These extensions can be used to debug JavaScript code in Yii applications to identify and fix front-end errors.