<?php
//round pour le changement d'heure
$debut = mktime(0, 0, 0, 10, 27, 2013);
$fin = mktime(23, 0, 0, 10, 27, 2013);
echo strtotime('+23 hours',$debut);
$d1 = new DateTime ('now',new DateTimeZone('Europe/Paris'));
$d2 = new DateTime ('now',new DateTimeZone('Europe/Paris'));
$d1->setTimestamp($debut);
$d2->setTimestamp($fin);
$diff = $d1->diff($d2);
print_r($diff);
$d3 = $d1->add($diff);
print_r($d3);
preferences:
33.89 ms | 402 KiB | 5 Q