訪問Yii框架自帶的例子系統時，頁面打印500錯誤：
Error 500
date() [<a href='function.date'>function.date</a>]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'UTC' for '8.0/no DST' instead
經查和試驗解決方案為：
在php.ini中設置時區：
date.timezone = "Asia/Shanghai"
或者在網頁開頭中加入：
<?php
date_default_timezone_set("PRC");
?>
