/**
* @intellisense
* @param {array} time - array(year, month, day, hour, minute, second)
* @param {int} firstdayofweek - the first day of the week. 0 - monday, 6 - sunday, -1 - use system settings
*/
function getweekstart($time, $firstdayofweek = -1)
{
global $locale_info;
if ($firstdayofweek < 0) {
$firstdayofweek = $locale_info["LOCALE_IFIRSTDAYOFWEEK"];
}
$wday = getdayofweek($time);
if ($wday >= $firstdayofweek + 1) {
$diff = $wday - $firstdayofweek - 1;
} else {
$diff = $wday + 7 - $firstdayofweek - 1;
}
return adddays($time, -$diff);
}
function cached_getdayofweek($strtime)
{
global $cache_getdayofweek;
if (!isset($cache_getdayofweek[$strtime])) {
$date = cached_db2time($strtime);
$res = getdayofweek($date);
$cache_getdayofweek[$strtime] = $res;
return $res;
} else {
return $cache_getdayofweek[$strtime];
}
}
function getweekstart($time)
{
global $locale_info;
$wday = getdayofweek($time);
if ($wday >= $locale_info["LOCALE_IFIRSTDAYOFWEEK"] + 1) {
$diff = $wday - $locale_info["LOCALE_IFIRSTDAYOFWEEK"] - 1;
} else {
$diff = $wday + 7 - $locale_info["LOCALE_IFIRSTDAYOFWEEK"] - 1;
}
return adddays($time, -$diff);
}
protected function getDatesByWeek($week, $year)
{
global $locale_info;
$startweekday = 0;
if ($locale_info["LOCALE_IFIRSTDAYOFWEEK"] > 0) {
$startweekday = 7 - $locale_info["LOCALE_IFIRSTDAYOFWEEK"];
}
$L = isleapyear($year) ? 1 : 0;
$months = array(31, 28 + $L, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
$total_days = ($week - 1) * 7;
$i = 0;
$sum = 0;
while ($sum <= $total_days) {
$sum += $months[$i++];
}
$sum -= $months[$i - 1];
$month = $i;
$day = $total_days - $sum;
$day_of_week = getdayofweek(array($year, $month, $day));
if ($day_of_week == 0) {
$day_of_week = 7;
}
$day = $day - ($day_of_week - 1) - $startweekday;
$dates = array();
$dates[0] = getYMDdate(mktime(0, 0, 0, $month, $day, $year));
$dates[1] = getYMDdate(mktime(1, 1, 1, $month, $day + 6, $year));
return $dates;
}
