PHP 5.3 Access to the YII framework from the example system with the page printing 500 error

When accessing the example system from the YII framework, the page prints 500 errors:

Error 500

Date () [<a href= ' function.date ' >function.date</a>]: It is isn't safe to rely on the system ' s timezone settings. You are are *required* to use the Date.timezone setting or the Date_default_timezone_set () function. In case you are used any of those methods and your are still getting this warning, for you most likely misspelled the timezone Iden Tifier. We selected ' UTC ' for ' 8.0/no DST ' instead

The check and test solutions are:

To set the time zone in php.ini:

Date.timezone = "Asia/shanghai"

Or add at the beginning of the page:

<?php

Date_default_timezone_set ("PRC");

?>