<?php
$date = "16.5.59";
$dateObj = date_parse_from_format("j.n.yy", $date);
echo $dateObj['day'].'-'.$dateObj['month'].'-'.$dateObj['year'];
?>
PD9waHAgCgokZGF0ZSA9ICIxNi41LjU5IjsKJGRhdGVPYmogPSBkYXRlX3BhcnNlX2Zyb21fZm9ybWF0KCJqLm4ueXkiLCAkZGF0ZSk7CgplY2hvICRkYXRlT2JqWydkYXknXS4nLScuJGRhdGVPYmpbJ21vbnRoJ10uJy0nLiRkYXRlT2JqWyd5ZWFyJ107Cgo/Pg==