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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); $json = json_encode(['expire'=> $time] , JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE | JSON_THROW_ON_ERROR); $afterDecoded = json_decode($json, true, 512, JSON_THROW_ON_ERROR); $time = $afterDecoded['expire']; $recreated = DateTimeImmutable::createFromFormat('U.u', json_encode($time)); var_dump($obj, $recreated, $recreated == $obj);
Output for git.master, git.master_jit, rfc.property-hooks
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)

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