如何使用php查找一个月中一天的星期数

Question

hai i found this PHP get number of week for month quiet helpful but it makes some error on all months start on Sundays for example "2013-09-01" gives week number as 2 (actually its '1').. any one got some idea?? please share thanks in advance.....

Answer 1

use date("W","2013-09-01"); .it will return week number as 01.

Answer 2

向其添加strtotime函数。工作正常.. date（“ W”，strtotime（“ 2013-09-01”））;

Answer 3

This utility function returns the week of the month for a specific day. Needs two args: the wanted day, and the first day of the same month

class WeekCalculator
{    
    public static function getWeekOfMonth($date, $firstDayOfMonth) {    
        $w1 = date("W", $firstDayOfMonth->getTimestamp());
        $w2 = date("W", $date->getTimestamp());

        $weekNum = $w2 - $w1 + 1;
        return $weekNum;
    }
}

Example usage

WeekCalculator::getWeekOfMonth(new \DateTime('2016-8-8'), new \DateTime('2016-8-1'));

Returns 2 (second week of August 2016)