- date: documentation ( source)
- strtotime: documentation ( source)
<?php
$Date = "2010-09-17 12:30:00";
echo date('Y-m-d H:i:s', strtotime(' + 1 day 1 hour 1 min'));
echo "\n\r";
echo date('Y-m-d H:i:s', strtotime(' next tue 23:59:59'));
echo "\n\r";
echo date("Y/m/d H.i.s", strtotime(date('Y-m-d H:i:s', strtotime('2014-09-09 23:59:59'))));