public static function getFrontiersPeriodID(&$debut, &$fin, $id)
{
$period = PeriodeCalendaire::getPeriods(null);
if (1 <= date("n") and date("n") <= 8) {
$annee = date("Y");
} else {
$annee = date("Y") + 1;
}
$ts = mktime(0, 0, 0, 1, 4, $annee);
// définition ISO de la semaine 01 : semaine du 4 janvier.
while (date("D", $ts) != "Mon") {
$ts -= 86400;
}
$ts_max = $ts + 86400 * 7 * 36;
$semaine = calendar::getNumLastWeek();
$ts_ref = $ts;
while ($semaine >= 33) {
$ts -= 86400 * 7;
$semaine--;
}
// =====================================================
$i = 1;
$j = 0;
$stop = false;
while ($period['id'][$j] != $id) {
$j++;
}
while ($ts <= $ts_max && !$stop) {
$ts_sup = $ts + 86400 - 1;
if ($ts == $period['debut'][$j]) {
$debut[] = $i;
while ($period['fin'][$j] > $ts) {
$ts += 86400;
$i++;
if (($i - 1) % 6 == 0) {
$ts += 86400;
}
}
$fin[] = $i;
$stop = true;
} else {
$ts += 86400;
$i++;
if (($i - 1) % 6 == 0) {
$ts += 86400;
}
}
}
}
