Adding together with PHP...

[Chris M]

Sounds silly, but anyway...

I have 4 fields in the user table, score1,score2,score3 and score4...

These store the scores from each stage of a test I make the user's take...

Anyway, I want to know how to add the contents of the fields together (also what field types I would need), so that the following will work:

$total = $DB_site->query("SELECT score1,score2,score3,score4 FROM user WHERE userid='$bbuserinfo[userid]'");

$addingup = "ADDING UP BIT";
$totalscore = "THE RESULT";

if ($totalscore<=6) {
 $group=='9';
}elseif ($totalscore>=7 AND $totalscore<=10) {
 $group=='11';
}elseif ($totalscore>=11 AND $totalscore<=13) {
 $group=='10';
}else{
 $group=='8';
}

$usergroupname = $DB_site->query("SELECT * FROM usergroup WHERE usergroupid='$group'");

$DB_site->query("UPDATE user SET usergroupid='$group' WHERE userid='$bbuserinfo[userid]'");

Any ideas?

Edit: Extra Info -

There are 4 questions, each with 4 possible answers, which are assigned a point value from 1 to 4, 4 being the highest and "best" answer, 1 being the lowest and "worst" answer (as such)

Satan