You are *required* to use the date.timezone setting or the date_default_timezone_set() function.

在调试PHP源码时，使用<?php echo date('Ymd',time()).rand(10000000,99999999); ?> 设置订单随机数，出现以下错误。

PHP message: PHP 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 'Asia/Chongqing' for 'CST/8.0/no DST' instead

解决方法：

在php.ini里加上

date.timezone = "Asia/Shanghai"(去掉前面的;)

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