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<?php var_dump($d = date('Y-\WW-w'), date('Y-m-d')); var_dump($t = strtotime($d)); var_dump((new DateTime('@'.$t))->format('Y-\WW-w')); var_dump((new DateTime('@'.$t))->format('Y-m-d')); var_dump(DateTime::createFromFormat('Y-\WW-w', $d));
Output for git.master, git.master_jit, rfc.property-hooks
string(10) "2019-W25-3" string(10) "2019-06-19" int(1560895200) string(10) "2019-W25-2" string(10) "2019-06-18" bool(false)

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