if($note_cal_1 <= 2100 || $note_cal_2 <= 2100)
{
    $K = 32;
}

if(($note_cal_1 > 2100 && $note_cal_1 <= 2400)  || ($note_cal_2 > 2100 && $note_cal_2 <= 2400))
{
    $K = 24;
}

if($note_cal_1 > 2400  || $note_cal_2 > 2400)
{
    $K = 16;
}

$F = 400;
$D = $note_cal_1 - $note_cal_2;
$D = $D - $D - $D;

if($gagne == 1)
{
    $note_cal_1 = $note_cal_1 + ($K * (1 - (1 / (1 + pow(10, $D / $F)))));
    $D = $note_cal_2 - $note_cal_1;
    $D = $D - $D - $D;
    $note_cal_2 = $note_cal_2 + ($K * (0 - (1 / (1 + pow(10, $D / $F)))));
}

else
{
    $note_cal_1 = $note_cal_1 + ($K * (0 - (1 / (1 + pow(10, $D / $F)))));
    $D = $note_cal_2 - $note_cal_1;
    $D = $D - $D - $D;
    $note_cal_2 = $note_cal_2 + ($K * (1 - (1 / (1 + pow(10, $D / $F)))));
}

if($gagne == 1)
{
    $nb_vote_cal_1++;
}

else
{
    $nb_vote_cal_2++;
}