sum of foreach?

[a2bardeals]

hello.
I have 3 pages.
The point of the 3 pages is to find out the total length of multiple video tapes.

1. The first has a form with a text field that asks the customer how many video tapes they have. Which is sent via the GET method as $tapes.

2. The second page takes that number and creates the same number of select fields to find the individual lengths of the tapes.

Using:
[code]<form name=form3 method=GET>
foreach ( range(1, $tapes) as $num ) {
echo '<select name=tape'.$num.'>';
echo '<option value=30>30 min</option>';
echo '<option value=60>60 min</option>';
echo '</select>';
}
</form>[/code]

3. The third page is the one i have problems with. I have the variable of each tape in the URL (eg. tape1=30&tape2=60) I know i can obviously manually call these values back simply by:

[code]echo $_GET[tape1];[/code]

but i don't know how many variables will need to be added up, therfore i can't simply do that....
so i started thinking...

the variable $tapes (number of tapes) also carries over to the third page by a hidden input variable in the second page so i tried:

[code]foreach( range(1, $tapes) as $number)  {
$no = 'tape'.$number;
echo $_GET[$no];
}
[/code]

this displays the values that i need to add up....

but how do i add them up? It's probably something really obvious and my brain is too fried to think of what will do that. After 3 hours in the php.net manual still no answer.

Please will someone help me out?

[doni49]

I'm assuming that the code you've already posted really does what you want and I haven't checked.

You said that the following does display all the values that you want to add up:
[code]foreach( range(1, $tapes) as $number)  {
$no = 'tape'.$number;
echo $_GET[$no];
}
[/code]

Change that to:
[code]
$total = 0;
foreach( range(1, $tapes) as $number)  {
$no = 'tape'.$number;
echo $_GET[$no];
$total += $_GET[$no];    //  <=this line basically says "take the variable 'total' and add the current number to it, changing the value of the total varialbe".
}
[/code]

[a2bardeals]

that totally works! i made the mistake of calling the 'echo' still in the 'foreach' bracket so it was displaying every time it added a number but simply calling it after the bracket returned the sum! So thaaaaank you.

[doni49]

Been there done that.  No problem.