You can customize Yii's default error pages by following these steps:
- Create a new folder named "error" in your "views" folder.
- Inside the "error" folder, create a new file for each of the error codes you want to customize (for example, "404.php" for a 404 error).
- In each of these files, you can customize the HTML and CSS to your liking, and add any additional functionality you require.
- At the bottom of each file, you can add a link back to your homepage or other relevant pages.
- To ensure that Yii uses your custom error pages instead of the default ones, you need to modify your main configuration file (usually located at "protected/config/main.php").
- In the "components" section of the configuration file, add the following code:
- Save the configuration file, and your custom error pages should now be active.