从日期PHP获取星期数（一年中的数字）

今天，使用PHP的

DateTime

<?php$ddate = "2012-10-18";$date = new DateTime($ddate);$week = $date->format("W");echo "Weeknummer: $week";

这是因为in中

mktime()

mktime(hour, minute, second, month, day, year);

因此，您的订单是错误的。

<?php$ddate = "2012-10-18";$duedt = explode("-", $ddate);$date  = mktime(0, 0, 0, $duedt[1], $duedt[2], $duedt[0]);$week  = (int)date('W', $date);echo "Weeknummer: " . $week;?>