PHP Warning: strftime(): It is not safe to rely on the system's timezone set

当运行一些程序时，在httpd日志中会有如下警告日志：

PHP Warning: strftime(): 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 ‘Asia/Chongqing‘ for ‘CST/8.0/no DST‘。。。。。。。。。。。

原因分析：
这是因为PHP默认是以格林威治标准时间（UTC）为准进行时间转换，因为自己所处的当地时间与UTC会有出入，格林威治标准时间和北京时间有8个小时的时间差。因此我们必须为PHP指定一个时区，让php知道以哪个时区为准进行转换。
解决办法：

在你的PHP程序头部使用date_default_timezone_set()设置我的默认时区为北京时间（PRC，中国的英文缩写），即 <?php date_default_timezone_set("PRC"); ?>就可以了。这种方法使用时太复杂，必须在每个使用date的文件中添加相关函数，下面的方法更简单方便。
在php.ini中找到date.timezone行，支持前面的‘;‘号（如果没有修改过的话应该是没有启动此选项的），并将它的值设置为PRC，设置好以后为：date.timezone="Asia/Shanghai"。

时间： 2024-12-18 21:51:08

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