php日期差异和整数计算

Question

i do have a lot of problem in follow code. first, I try to get number of days between two date and try to multiply with some integer. However, it doesn't multiplied. How can I get correct answer?

Help me guys.

function GetTotalDay($D1, $D2)
{
    //$str = "19-04-2016";
    $str = strtotime($D2) - (strtotime($D1));
    echo (int)floor($str/3600/24);
}

$C1=GetTotalDay("01/01-2016", "03-01-2016");
$C2=12;
echo $C1 * $C2;

Answer 1

Check this corrected code

function GetTotalDay($D1, $D2) {
  $str = strtotime($D2) - (strtotime($D1));
  return (int)floor($str/3600/24);
}

$C1 = GetTotalDay("01-01-2016", "03-01-2016");
$C2 = 12;
echo $C1 * $C2;