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<?php \date_default_timezone_set('Europe/Berlin'); $dateTime = new \DateTime('2016-08-25 12:00:00', new \DateTimeZone('UTC')); \var_dump($dateTime, date('Y-m-d H:i:s', $dateTime->getTimestamp()), \date_default_timezone_get());
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
object(DateTime)#1 (3) { ["date"]=> string(26) "2016-08-25 12:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } string(19) "2016-08-25 14:00:00" string(13) "Europe/Berlin"

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147.38 ms | 408 KiB | 5 Q