/**
* Returns week of the year, first Sunday is first day of first week
*
* @param int $day
* the day of the month, default is current local day
* @param int $month
* the month, default is current local month
* @param int $year
* the year in four digit format, default is current local year
*
* @return int the number of the week in the year
*
* @access public
* @static
*
*/
static function weekOfYear($day = 0, $month = 0, $year = 0)
{
if (empty($year)) {
$year = Calc::dateNow('%Y');
}
if (empty($month)) {
$month = Calc::dateNow('%m');
}
if (empty($day)) {
$day = Calc::dateNow('%d');
}
$iso = Calc::gregorianToISO($day, $month, $year);
$parts = explode('-', $iso);
$week_number = intval($parts[1]);
return $week_number;
}
