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（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
解决方案：Warning: phpinfo(): It is not safe to rely on the system's timezone settings.
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原文地址：http://blog.csdn.net/weisubao/article/details/43761387
