PHP Warning reports 'timezone' error_PHP Tutorial

PHP Warning:  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 'Asia/Chongqing' for 'CST/8.0/no DST' instead in /var/www/html/include/global_constants.php on line 160

解决办法，在php.ini里加上

date.timezone = "Asia/Chongqing"