- var_dump: documentation ( source)
- unserialize: documentation ( source)
- serialize: documentation ( source)
<?php
$interval = new DateInterval('PT1S');
$interval->f = -0.000001;
var_dump($interval->s, $interval->f);
echo "\n";
$interval = unserialize(serialize($interval));
var_dump($interval->s, $interval->f);