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<?php $value = (string) 1616477400.9510319232940673828125; var_dump( json_encode($value), DateTimeImmutable::createFromFormat( 'U.u', json_encode($value) ), DateTimeImmutable::createFromFormat( 'U.u', number_format($value, 6, '.', '') ), );
Output for git.master, git.master_jit, rfc.property-hooks
string(16) ""1616477400.951"" bool(false) object(DateTimeImmutable)#1 (3) { ["date"]=> string(26) "2021-03-23 05:30:00.951000" ["timezone_type"]=> int(1) ["timezone"]=> string(6) "+00:00" }

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