部署php代码时遇到问题如下：
strict standards: date_default_timezone_get() [function.date-default-timezone-get]: it is not safe to rely on the system's timezone settings. please use the date.timezone setting, the tz environment variable 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 in c:\appserv\www\nipin\configs\config.php on line 25
strict standards: mktime() [function.mktime]: it is not safe to rely on the system's timezone settings. please use the date.timezone setting, the tz environment variable 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 in c:\appserv\www\nipin\configs\config.php on line 25
strict standards: mktime() [function.mktime]: you should be using the time() function instead in c:\appserv\www\nipin\configs\config.php on line 25
原因是php取得格林威治时间和北京的时间相差8个小时，应该取北京的时间。
原来上面报错，主要体现在一句话上：
$getime = date_default_timezone_get()=='utc' ? mktime()+28800 : mktime();
解决方法有二：
1，是直接增加这句话取代上面这句，date_default_timezone_set(prc);直接设置为背景时间。
2，在php.ini文件里，设置：;date.timezone = asia/shanghai 或者 date.timezone=prc
以上就介绍了mktime() [function.mktime]: it is not safe to rely on the systems timezone settings问题解决，包括了方面的内容，希望对php教程有兴趣的朋友有所帮助。