php函数获取最近7周的日期

Question

I am trying to build a php function that would return an array with the start date and end date of the last n number of weeks. this would include the current week. It would look something like this:

function lastnweeks(n)
{
//the code. I am not asking for the code itself but ideas on how to accomplish this
return $array; 
}
$lastnweeks =lastnweeks(2);
print_r($lastnweeks);

this would print:

Array ( 
    [0] =>  Array ( 
        [0] => 2010/09/20 
        [1] => 2010/09/26
   )[1] => Array ( 
        [0] => 2010/09/13 
        [1] => 2010/09/19
))

Answer 1

Use strtotime to get the monday and then subtract the number of seconds for each week:

function lastnweeks($n) {
    $time = strtotime('Monday 00:00:00+0000');
    $arr = array();
    while ($n-- > 0) {
        $arr[] = array_reverse(array(
            date('Y/m/d', $time-=86400),   // sunday
            date('Y/m/d', $time-=6*86400)  // monday
        ));
    }
    return $arr;
}

array_reverse is used to reverse the array as the calculation walks backwards.