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run code in 200+ php & hhvm versions
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<?php echo \DateTime::createFromFormat('d/m/Y', '01/07/2017')->format('YY-mm-dd H:i:s');
based on HED0q
Output for 5.6.0 - 5.6.30, 7.0.0 - 7.3.0rc3
20172017-0707-0101 13:02:09
Output for hhvm-3.15.4
20172017-0707-0101 13:02:10