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<?php $input = [ "2021-01-01", "2019-05-23", "2022-09-13", ]; $dates = array_map( function (string $dateString) { return (new \DateTimeImmutable($dateString))->format("Y-m-d"); }, $input ); sort($dates); var_dump($dates);
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { [0]=> string(10) "2019-05-23" [1]=> string(10) "2021-01-01" [2]=> string(10) "2022-09-13" }

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