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<?php $dateTime = new DateTime('2016-10-29 10:00:00'); $dateTime->add(new DateInterval('P1D')); var_dump($dateTime); // 2016-10-30 10:00 $dateTime = new DateTime('2016-10-29 10:00:00'); $dateTime->add(new DateInterval('PT24H')); var_dump($dateTime); // 2016-10-30 09:00
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.32, 8.4.1 - 8.4.23, 8.5.0 - 8.5.8
object(DateTime)#1 (3) { ["date"]=> string(26) "2016-10-30 10:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } object(DateTime)#2 (3) { ["date"]=> string(26) "2016-10-30 09:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" }
Output for 7.3.32 - 7.3.33, 8.0.13
object(DateTime)#1 (3) { ["date"]=> string(26) "2016-10-30 10:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } object(DateTime)#2 (3) { ["date"]=> string(26) "2016-10-30 10:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" }

preferences:
120.05 ms | 2098 KiB | 4 Q