PHP计算2个日期之间的天数

Question

我正在开发一个围绕日期的Web应用程序.

我需要根据天数来计算数字,例如 - 伪代码

$count_only = array('monday', 'wednesday', 'friday'); //count only these days
$start_date = 1298572294;  // a day in the past
$finish_date = 1314210695; //another day

$var = number_of_days_between($start_date, $finish_date, $count_only);

有没有办法确定已经过了多少整天,而只计算某些天？

Answer 1

您可以创建一个循环，该循环从 开始进入数组中的第二天$count_only，$start_date并在到达 时停止（从函数返回）$end_date。

function number_of_days_between($start_date, $finish_date, $count_only) {
    $count  = 0;
    $start  = new DateTime("@$start_date");
    $end    = new DateTime("@$finish_date");
    $days   = new InfiniteIterator(new ArrayIterator($count_only));
    foreach ($days as $day) {
        $count++;
        $start->modify("next $day");
        if ($start > $end) {
            return $count;
        }
    }
}