//根據第幾周獲取當周的開始日期與最后日期 public function getWeekDate($year, $weeknum) {$firstdayofyear = mktime(0, 0, 0, 1, 1, $year);$firstweekday = date('N', $firstdayofyear);$firstweenum = date('W', $firstdayofyear);if ($firstweenum == 1) {$day = (1 - ($firstweekday - 1)) + 7 * ($weeknum - 1);$startdate = date('Y-m-d', mktime(0, 0, 0, 1, $day, $year));$enddate = date('Y-m-d', mktime(0, 0, 0, 1, $day + 6, $year));} else {$day = (9 - $firstweekday) + 7 * ($weeknum - 1);$startdate = date('Y-m-d', mktime(0, 0, 0, 1, $day, $year));$enddate = date('Y-m-d', mktime(0, 0, 0, 1, $day + 6, $year));}return array($startdate, $enddate); }

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