$sum = 0;
while($row=mysql_fetch_array($result)){
$id = $row['id'];
$score = $row['score'];
$sum += (int)$score;
}
echo $sum;
$sum = 0;
while($row=mysql_fetch_array($result)){
$id = $row['id'];
$score = $row['score'];
$sum += (int)$score;
}
echo $sum;