Warning: strtotime() [function.strtotime]: 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

因php的版本较高需要配置php.ini

解决方法
   1：改 php.ini
[Date]
; Defines the default timezone used by the date functions
; http://php.net/date.timezone
date.timezone ='Asia/Shanghai'
2：在程序代码中写入
第一行写入：date_default_timezone_set ('Asia/Shanghai');