php - DateTime returns wrong year -


my code following:

<?php $newdate = new datetime('2012'); echo $newdate->format('y');

why $newdate->format('y') returns 2015 (current year) , not 2012?

because 2012 not valid date string. default date , time set object current, 2015. can hint format going use datetime::createfromformat

$date = datetime::createfromformat('y', '2012'); echo $date->format('y');

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