UPDATE 表复制分数

Question

我正在尝试记录一个足球俱乐部的最后 5 个结果。 假设最后 5 个结果是 win(1), tie(0), tie(0), lost(-1), loss (-1)，所以表格应该显示 r1 = 1, r2 = 0, r3 = 0 , r4 = -1, r5 = -1，即最近的结果 r1。 当我运行代码时，假设这家具乐部输掉了最后一场比赛，它复制了显示 r1 = -1, r2 = -1, r3 = 1, r4 = 0, r5 = 0 的结果。我不知道它为什么分配r1 和 r2 具有相同的值。 这段代码如下：

$result = mysqli_query($dbc_epl, "SELECT res, home, visitor FROM fixtures WHERE gw = '" . $gw . "'");
$row = mysqli_fetch_assoc($result);
if(!empty($row['res']))
{
    switch($row['res'])
    {
        case '1':
            $rh++;
            $rv--;
            break;
        case '2':
            $rv++;
            $rh--;
            break;
        case 'X':
            $rh = 0;
            $rv = 0;
            break;
    }
    $sqlh = mysqli_query($dbc_epl, "SELECT r1, r2, r3, r4 FROM clubs WHERE club_id = '" . $row['home'] . "'");
    $row_fixh = mysqli_fetch_assoc($sqlh);

    mysqli_query($dbc_epl, "UPDATE clubs SET r5 = '" . $row_fixh['r4'] . "', r4 = '" . $row_fixh['r3'] . "', r3 = '" . $row_fixh['r2'] . "', r2 = '" . $row_fixh['r1'] . "', r1 = '" . $rh . "' WHERE club_id = '" . $row['home'] . "'");
            
    $sqlv = mysqli_query($dbc_epl, "SELECT r1, r2, r3, r4 FROM clubs WHERE club_id = '" . $row1['visitor'] . "'");
    $row_fixv = mysqli_fetch_assoc($sqlv);

    mysqli_query($dbc_epl, "UPDATE clubs SET r5 = '" . $row_fixv['r4'] . "', r4 = '" . $row_fixv['r3'] . "', r3 = '" . $row_fixv['r2'] . "', r2 = '" . $row_fixv['r1'] . "', r1 = '" . $rv . "' WHERE club_id = '" . $row['visitor'] . "'");
}