<?php // Leap second on 2016-12-31 $date = DateTimeImmutable::createFromFormat( 'j-M-Y H:i:s', '31-Dec-2016 23:59:60' ); echo $date->format('Y-m-d H:i:s'); // 2017-01-01 00:00:00 $date = DateTimeImmutable::createFromFormat( 'j-M-Y H:i:s', '99-Dec-2016 99:99:99' ); echo $date->format('Y-m-d H:i:s'); // 2017-03-13 04:40:39 $date = DateTimeImmutable::createFromFormat( 'j-M-Y H:i:s', '99-Dec-2016 99:99:100' ); var_dump($date); // false
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