获取给定的一组日期时间的第一个星期一

Question

What I Require

I have a certain list of datetimes. I want to get the first monday of each datetimes.

eg: Suppose the given datetimes are

 2013-07-05 2013-08-05, 2013-09-13 etc.

I want to get the first monday of all these datetimes such that the output results in

 2013-07-01, 2013-08-05, 2013-09-02 respectively

I am actually stuck with this using stftime.

strftime("%d/%m/%Y", strtotime("first Monday of July 2012"));

Answer 1

Using php Datetime class:

$Dates = array('2013-07-02', '2013-08-05', '2013-09-13');
foreach ($Dates as $Date)
{
    $test = new DateTime($Date);
    echo $test->modify('first monday')->format('Y-m-d');
}