title: Make yii 1.1 contunie working with non noncritical errors
body: <p>Working with yii 1.1  sometimes I find in very ungood that on any error(even on noncritical like Undefined variable ) in my code the working of my app is stopped and error 
  page is shown and also all output of my site is not visible. If there is a way to continue rendering of page with noncritical errors ?
  Maybe using  xdebug_start_error_collection and xdebug_get_collected_errors methods from here <a href="http://www.xdebug.org/docs/basic" rel="nofollow">http://www.xdebug.org/docs/basic</a> ?</p>