Sara,
You're on the right track. You've created your functions, but they need
some work before they can be used.
Starting with getTax()
you've got a naming convention conflict, while not necessarily a problem,
it's bad style. Instead of $item as the parameter for the function, use
something like $price, so:
function getTax($price)
{
$tax = $price * 0.065;
return $tax;
}
or even better:
function getTax($price)
{
return $price * 0.065;
}
(notice I removed the echo statement)
For the second function getBalance(), you've got a scope problem.
Looks like you're trying to use the value that $tax contains. But $tax only
has that value within the getTax function.
If your getBalance() function was this:
function getBalance($item)
{
echo $tax;
}
you'd get nothing (well you'd get errors/warnings), because $tax isn't
defined within the scope of getBalance(). If you want to use $tax, then you
have to pass it as an attribute of the function like this:
function getBalance($price,$tax)
{
echo $tax;
}
Another problem, similar to the $tax, is your use of $balance. It will have
no value, until you add the subtotal, and then 1 to it, then you'll have the
subtotal +1, i.e. numbers like 15976, 2.065.
So in addition to passing the tax you'll have to pass the current balance.
Here's the new improved getBalance() function:
function getBalance($price, $tax, $balance)
{
$subtotal = $price + $tax;
$balance = $balance + $subtotal + 1;
return $balance;
}
I've no idea why you're adding 1, but what the heck.
Now that you've got improved functions, you need to call them. To do that
you need to do something like:
$tax = getTax($price);
Then to use the 'new' second function try:
$balance = getBalance($price,$tax,$balance);
Hope this is helpful.
Chris
-----Original Message-----
From: Sara Daugherty [mailto:[EMAIL PROTECTED]
Sent: Wednesday, November 19, 2003 11:54 PM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Subject: [PHP] tax functions
Hello,
I am new to php. I am trying to learn functions.
Can someone look at my code and tell me if I am on the right track or if
I am doing something wrong?
Here is the link where my script can be found:
http://www.areawebdirectory.net/taxfunction.txt
Thanks,
Sara D.
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