<?php
//round pour le changement d'heure
$debut = mktime(0, 0, 0, 10, 27, 2013);
$fin = mktime(23, 59, 59, 11, 10, 2013);
$d1 = new DateTime('now',new DateTimeZone('America/Sao_Paulo'));
$d2 = new DateTime('now',new DateTimeZone('Europe/Paris'));
$d1->setTimestamp($debut);
$d2->setTimestamp($fin);
$diff = $d1->diff($d2);
print_r($diff);
preferences:
61.49 ms | 402 KiB | 5 Q