how to re-format datetime string in php?
why not use date() just like below,try this
$t = strtotime('20130409163705');
echo date('d/m/y H:i:s',$t);
and will be output
09/04/13 16:37:05
date("Y-m-d H:i:s", strtotime("2019-05-13"))
For PHP 5 >= 5.3.0 http://www.php.net/manual/en/datetime.createfromformat.php
$datetime = "20130409163705";
$d = DateTime::createFromFormat("YmdHis", $datetime);
echo $d->format("d/m/Y H:i:s"); // or any you want
Result:
09/04/2013 16:37:05