方法一：
date_default_timezone_set("Asia/Shanghai");
$year = (int)$_GET['year'];
$week = (int)$_GET['week'];
$weeks = date("W", mktime(0, 0, 0, 12, 28, $year));
echo $year . '年一共有' . $weeks . '周
';
if ($week > $weeks || $week <= 0)
{
$week = 1;
}
if ($week < 10)
{
$week = '0' . $week;
}
$timestamp['start'] = strtotime($year . 'W' . $week);
$timestamp['end'] = strtotime('+1 week -1 day', $timestamp['start']);
echo $year . '年第' . $week . '周开始时间戳：' . $timestamp['start'] . '
';
echo $year . '年第' . $week . '周结束时间戳：' . $timestamp['end'] . '
';
echo $year . '年第' . $week . '周开始日期：' . date("Y-m-d", $timestamp['start']) . '
';
echo $year . '年第' . $week . '周结束日期：' . date("Y-m-d", $timestamp['end']);
?>
方法二： header("Content-type:text/html;charset=utf-8");
function getIsoWeeksInYear($year)
{
$date = new DateTime;
$date->setISODate($year, 53);
return ($date->format("W") === "53" ? 53 : 52);
}
function weekday($custom_date)
{
$week_start = date('d-m-Y', strtotime('this week monday', $custom_date));
$week_end = date('d-m-Y', strtotime('this week sunday', $custom_date));
$week_array[0] = $week_start;
$week_array[1] = $week_end;
return $week_array;
}
echo '
Weeks in 2013
' . getIsoWeeksInYear(2013);
$weekday = weekday(strtotime(date('d-m-Y', strtotime('5-8-2013'))));
echo '
10-8-2013';
echo '
Start: ' . $weekday[0];
echo '
End: ' . $weekday[1];
?>
或者方法三：
function get_week($year) {
$year_start = $year . "-01-01";
$year_end = $year . "-12-31";
$startday = strtotime($year_start);
if (intval(date('N', $startday)) != '1') {
$startday = strtotime("next monday", strtotime($year_start)); //获取年第一周的日期
}
$year_mondy = date("Y-m-d", $startday); //获取年第一周的日期
$endday = strtotime($year_end);
if (intval(date('W', $endday)) == '7') {
$endday = strtotime("last sunday", strtotime($year_end));
}
$num = intval(date('W', $endday));
for ($i = 1; $i <= $num; $i++) {
$j = $i -1;
$start_date = date("Y-m-d", strtotime("$year_mondy $j week "));
$end_day = date("Y-m-d", strtotime("$start_date +6 day"));
$week_array[$i] = array (
str_replace("-",
".",
$start_date
), str_replace("-", ".", $end_day));
}
return $week_array;
}
函数get_week()通过传入参数$year年份，获取当年第一天和最后一天所在的周数，计算第一周的日期，通过循环获取每一周的第一天和最后一天的日期。最后返回是一个数组。
想得到指定周数的开始日期和结束日期，比如2011年第18周的开始日期和结束日期，代码如下：
复制代码 代码如下:
$weeks = get_week(2011);
echo '第18周开始日期：'.$weeks[18][0].'';
echo '第18周结束日期：'.$weeks[18][1];
最后输出结果：
第18周开始日期：2011.05.02
第18周结束日期：2011.05.08
