date_default_timezone_set 可以改变new DateTime. 不知道会有什么影响get_the_time.
$date = new DateTime( get_the_time(\'c\') );
$date->setTimezone(new DateTimeZone(\'Europe/Warsaw\'));
echo $date->format(\'c\');
<小时>
$date = new DateTime();
echo $date->format(\'c\');
// 2015-12-18T18:21:31+00:00
<小时>
$date->setTimezone(new DateTimeZone(\'Europe/Warsaw\'));
echo $date->format(\'c\');
// 2015-12-18T19:21:31+01:00
<小时>
date_default_timezone_set(\'Europe/Warsaw\');
$date = new DateTime();
echo $date->format(\'c\');
// 2015-12-18T19:21:31+01:00
