<?php
$start = new DateTime('2003-01-02 08:00:00');
$end = new DateTime('2003-01-02 12:00:00');
$diff = $start->diff($end);
$p = new DatePeriod($start, $diff, 2);
$diff_s = serialize($diff);
var_dump($diff, $diff_s);
var_export($diff);
$diff_un = unserialize($diff_s);
$p = new DatePeriod($start, $diff_un, 2);
var_dump($diff_un, $p);
$unser = DateInterval::__set_state(array('y' => 7, 'm' => 6, 'd' => 5, 'h' => 4, 'i' => 3, 's' => 2, 'invert' => 1, 'days' => 2400));
$p = new DatePeriod($start, $diff_un, 2);
var_dump($unser, $p);
