前回の記事で $ php -a Interactive shell php > echo strftime('%Y-%m-%d %H:%M:%S', time()); 2013-03-09 13:40:52 を実行すると PHP Warning: strftime(): 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