解决方案：Warning: phpinfo(): It is not safe to rely on the system's timezone settings.

（1）打开phpinfo();时在date地方会出现如下提示：

Warning: phpinfo(): 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 the timezone 'UTC' for now, but please set date.timezone to select your timezone.

看下面表格，发现date.timezone没有设置值：

Directive	Local Value	Master Value
date.default_latitude	31.7667	31.7667
date.default_longitude	35.2333	35.2333
date.sunrise_zenith	90.583333	90.583333
date.sunset_zenith	90.583333	90.583333
date.timezone	no value	no value

（2）这是php的事情，设置就在php.ini中。发现默认的是;date.timezone=，后面没有值。所以增加最下面那一行即可。

[Date]
; Defines the default timezone used by the date functions
; http://php.net/date.timezone ;date.timezone =
;增加一个timezone
date.timezone=PRC

（3）记得重启apache服务器。让设置生效。