Problem with array

I have some code im trying to make smaller using a for loop and an array. I basically have a form with 4 drop down boxes that are either minor or substantial, if minor is selected 5 should be added to the total
if substantial 10 should be added for each drop down box. My original code that works is:


if($a1 == "Minor")
{
$count = $count + 5;
}
else if ($a1 == "Substantial")
{
$count = $count + 10;
}


if($b1 == "Minor")
{
$count = $count + 5;
}
else if ($b1 == "Substantial")
{
$count = $count + 10;
}

if($c1 == "Minor")
{
$count = $count + 5;
}
else if ($c1 == "Substantial")
{
$count = $count + 10;
}


if($d1 == "Minor")
{
$count = $count + 5;
}
else if ($d1 == "Substantial")
{
$count = $count + 10;
}


the new code which doesn't work is:


$letter = array(
0 => $a1 = $_POST['a1'],
1 => $b1 = $_POST['b1'],
2 => $c1 = $_POST['c1'],
3 => $d1 = $_POST['d1']
);

$x = 0;

for ($i = 0; $i < count($letter); $i++)
{
if($letter[$x++] == "Minor")
{
$count = $count + 5;
}
if ($letter[$x++] == "Substantial")
{
$count = $count + 10;
}
}

Im starting to think its not a problem with the array but some problem in the count. Any pointers in the right direction would be appreciated.

Can you change your html to make your selects arrays? e.g. name="selections[]"

You don't need that $x variable; you are incrementing it twice each loop and you already have a iterator variable defined by the for() (http://php.net/for) loop:

$letter_count = count($letter);
for ($i = 0; $i < $letter_count; $i++)
{
if($letter[$i] == 'Minor')
{
$count += 5;
}
elseif ($letter[$i] == 'Substantial')
{
$count += 10;
}
}