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<?php var_dump( new DateTime('2023-01-01T00:00:00Z', new DateTimeZone('Asia/Tokyo')), new DateTime('2023-01-01T00:00:00', new DateTimeZone('Asia/Tokyo')), (new DateTime('2023-01-01T00:00:00Z', new DateTimeZone('Asia/Tokyo')))->setTimeZone(new DateTimeZone('Asia/Tokyo')), (new DateTime('2023-01-01T00:00:00', new DateTimeZone('Asia/Tokyo')))->setTimeZone(new DateTimeZone('Asia/Tokyo')), );
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.20, 8.3.0 - 8.3.8
object(DateTime)#1 (3) { ["date"]=> string(26) "2023-01-01 00:00:00.000000" ["timezone_type"]=> int(2) ["timezone"]=> string(1) "Z" } object(DateTime)#2 (3) { ["date"]=> string(26) "2023-01-01 00:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(10) "Asia/Tokyo" } object(DateTime)#3 (3) { ["date"]=> string(26) "2023-01-01 09:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(10) "Asia/Tokyo" } object(DateTime)#4 (3) { ["date"]=> string(26) "2023-01-01 00:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(10) "Asia/Tokyo" }

preferences:
100.97 ms | 403 KiB | 94 Q