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<?php $obj = new DateTimeImmutable('2021-03-18 14:38:45.008455'); $time = (float) $obj->format('U.u'); $recreated = DateTimeImmutable::createFromFormat('U.u', json_encode($time)); var_dump($obj, $recreated, $recreated == $obj); $time = json_decode($obj->format('U.u')); $recreated = DateTimeImmutable::createFromFormat('U.u', json_encode($time)); var_dump($obj, $recreated, $recreated == $obj);
Output for 7.3.0 - 7.3.31, 7.3.33, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
object(DateTimeImmutable)#1 (3) { ["date"]=> string(26) "2021-03-18 14:38:45.008455" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } object(DateTimeImmutable)#2 (3) { ["date"]=> string(26) "2021-03-18 13:38:45.008455" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" } bool(true) object(DateTimeImmutable)#1 (3) { ["date"]=> string(26) "2021-03-18 14:38:45.008455" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } object(DateTimeImmutable)#3 (3) { ["date"]=> string(26) "2021-03-18 13:38:45.008455" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" } bool(true)
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 object(DateTimeImmutable)#1 (3) { ["date"]=> string(26) "2021-03-18 14:38:45.008455" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } object(DateTimeImmutable)#2 (3) { ["date"]=> string(26) "2021-03-18 13:38:45.008455" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" } bool(true) object(DateTimeImmutable)#1 (3) { ["date"]=> string(26) "2021-03-18 14:38:45.008455" ["timezone_type"]=> int(3) ["timezone"]=> string(16) "Europe/Amsterdam" } object(DateTimeImmutable)#3 (3) { ["date"]=> string(26) "2021-03-18 13:38:45.008455" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" } bool(true)
Output for 7.3.32, 7.4.26, 8.0.13
object(DateTimeImmutable)#1 (3) { ["date"]=> string(26) "2021-03-18 14:38:45.008455" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } object(DateTimeImmutable)#2 (3) { ["date"]=> string(26) "2021-03-18 14:38:45.008455" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" } bool(true) object(DateTimeImmutable)#1 (3) { ["date"]=> string(26) "2021-03-18 14:38:45.008455" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } object(DateTimeImmutable)#3 (3) { ["date"]=> string(26) "2021-03-18 14:38:45.008455" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" } bool(true)

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