date() [function.date]: 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 in";
解決方法：
一、在頁頭使用date_default_timezone_set()；設置 date_default_timezone_set('PRC'); //東八時區 echo
date('Y-m-d H:i:s');
二、在頁頭使用 ini_set('date.timezone','Asia/Shanghai');
三、修改 php.ini ：使用記事本打開 php.ini ctrl+f 查找 date.timezone 去掉前面的分號修改成爲：date.timezone = PRC