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<?php print_r(new DateTime('@1463387612')); print_r((new DateTime('@1463387612'))->setTimezone(new DateTimeZone('Europe/London')));
Output for 5.5.14 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
DateTime Object ( [date] => 2016-05-16 08:33:32.000000 [timezone_type] => 1 [timezone] => +00:00 ) DateTime Object ( [date] => 2016-05-16 09:33:32.000000 [timezone_type] => 3 [timezone] => Europe/London )
Output for 5.5.0 - 5.5.13
DateTime Object ( [date] => 2016-05-16 08:33:32 [timezone_type] => 1 [timezone] => +00:00 ) DateTime Object ( [date] => 2016-05-16 09:33:32 [timezone_type] => 3 [timezone] => Europe/London )

preferences:
256.13 ms | 402 KiB | 226 Q