How to redirect every page to a static page when maintaining

Yii 1.1 General Discussion
1

How do I config Yii to redirect every page to a static page when I maintain the server or database.

2

An .htaccess rule perhaps?

3

see this : CWebApplication::catchAllRequest

4

If you do that, don’t forget to cast a 503 (Service Unavailable) http response code.