编写函数，传入年月日三个值，返回一年当中的第几天

<?php


class demo
{
    #编写函数，传入年月日三个值，返回一年当中的第几天
    public function getDay($year, $month, $day)
    {
        $sum = 0;
        $rYear = [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];//闰年
        $Year = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];#平年
        if ($year % 4 == 0 && $year % 100 != 0 || $year % 100 == 0) {
            for ($i = 0; $i < $month - 1; $i++) {
                $sum += $rYear[$i];
            }
            echo $sum + $day;
        } else {
            for ($i = 0; $i < $month - 1; $i++) {
                $sum += $Year[$i];
            }
            echo $sum + $day;
        }

    }
}

$cs = new demo();

$cs->getDay(2019, 3, 1);