php CI框架log_message报错

再调用log_message的时候报告如下错误：

A PHP Error was encountered

Severity: Warning

Message: 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

Filename: libraries/Log.php

Line Number: 89

解决方案：

打开php.ini ，修改date.timezone，进行如下配置：

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