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<?php $dateTime = '2007-01-11 12:34:56'; preg_match('~(\d{4}-\d{2}-\d{2})\s?(\d{2}:\d{2}:\d{2})?~', $dateTime, $matches); $matches[2] = array_key_exists(2, $matches) ? $matches[2] :'00:00:00'; var_dump($matches); $dateTime = vsprintf('%1s %3s', $matches); var_dump($dateTime);
Output for 7.0.0 - 7.0.31, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array(3) { [0]=> string(19) "2007-01-11 12:34:56" [1]=> string(10) "2007-01-11" [2]=> string(8) "12:34:56" } string(30) "2007-01-11 12:34:56 2007-01-11"

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