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Posted by Jamie Alessio on 10/04/78 11:09
> I have messed with this for a couple of days and cant get it right. Maybe I
> need sleep :-)
>
> The code below is echoing the qty correctly (10, 5, 25)
>
> for ($i = 1; $i <= $sendnum; $i++)
>
> {
>
> $qty = $_POST['qty'.$i];
>
> echo $qty . '<br />';
>
> }
>
> The question is, how would I take add each of these numbers (10+5+25)?
>
Jay,
Maybe I'm missing something here but wouldn't this do the trick?
///////////////
$total = 0;
for ($i = 1; $i <= $sendnum; $i++)
{
$qty = $_POST['qty'.$i];
echo $qty . '<br />';
$total += $qty;
}
echo "Total = {$total}<br>";
///////////////
I have a suggestion related to how you are naming elements in your form.
Based on the way you are accessing elements in your $_POST array it
looks like your form is setup something like this:
<input name="qty1">
<input name="qty2">
....
<input name="qty99">
The problem is that when the form is posted you have no way to easily
loop over all the "qty" elements. In your example you are using a for()
loop with $sendnum which is a value you had to figure out one way or
another. An easier solution might be to do something like this:
<input name="qty[1]">
<input name="qty[2]">
...
<input name="qty[99]">
and then in your PHP code you can easily loop over the values like this:
///////////////
$total = 0;
foreach($_POST['qty'] as $key => $value)
{
echo "The quantity for {$key} is {$value}<br>";
$total += $value;
}
echo "Total = {$total}<br>";
///////////////
Actually, now that all your values are now in an array you could remove
the $total calculation from the loop and calculate it by doing this:
$total = array_sum($_POST['qty']);
Try using arrays in your forms instead of sticking numbers onto the end
of your variable names and I think you'll find things getting much
easier for you.
- Jamie
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