intdiv（）未按预期工作(intdiv() is not working as expected)

 我正在使用这个功能，但结果不像预期的那样 
 
function getyearly($monthly, $yearly)
    {
        if(!empty($monthly) && $monthly!='0' && !empty($yearly) && $yearly!='0')
        {
            $permonth = intdiv((int)$yearly, 12);
            $monthlytoyear = (int)$monthly*12;
            $aftersub = $monthlytoyear - (int)$yearly;
            $afterdiv = intdiv((int)$aftersub, (int)$yearly);
            // $finaly = (int)$afterdiv*100;
            return "$ " . $yearly . "/year ($" . round($permonth) . "/month; save ~" . (int)$afterdiv . "%)";
        } else {
            return '$ '.$yearly.'/yearly';
        }
    }
 
 我得到零（ 0 ）。 

I am using this function but result not coming as expected 
 
function getyearly($monthly, $yearly)
    {
        if(!empty($monthly) && $monthly!='0' && !empty($yearly) && $yearly!='0')
        {
            $permonth = intdiv((int)$yearly, 12);
            $monthlytoyear = (int)$monthly*12;
            $aftersub = $monthlytoyear - (int)$yearly;
            $afterdiv = intdiv((int)$aftersub, (int)$yearly);
            // $finaly = (int)$afterdiv*100;
            return "$ " . $yearly . "/year ($" . round($permonth) . "/month; save ~" . (int)$afterdiv . "%)";
        } else {
            return '$ '.$yearly.'/yearly';
        }
    }
 
I am getting zero(0).

原文：https://stackoverflow.com/questions/50456925