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<?php $dateTime = '2007-01-11 12:34:56'; preg_match('~(?<date>\d{4}-\d{2}-\d{2})\s?(?<time>\d{2}:\d{2}:\d{2})?~', $dateTime, $matches); $matches['time'] = array_key_exists('time', $matches) ?: '00:00:00'; var_dump($matches);
Output for git.master, git.master_jit, rfc.property-hooks
array(5) { [0]=> string(19) "2007-01-11 12:34:56" ["date"]=> string(10) "2007-01-11" [1]=> string(10) "2007-01-11" ["time"]=> bool(true) [2]=> string(8) "12:34:56" }

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