Prob with Variable Output, Calculations..

nationwide

I am attempting to display the results of strings carried across a redirect, everything is working fine except that the result gives more than 2 decimal places, and I cannot figure out how to keep it to only the 2 decimals.

As you can see I am calculating the Order Total after adding VAT, I already have the item totals $price1 , $price2 and the VAT calculates fine but produces more than 2 decimal places.

// the calculation
<?
$subtotal = $price1+$price2;
$vat = $subtotal*.175;
$total = $vat+$subtotal;
?>

//the output
<?=$subtotal?>
<?=$vat?>
<?=$total?>

I am fairly new to PHP and enjoy solving problems, but this buggers got me beat...

dannys

Try

<? printf ("%02.2f",$subtotal); ?>
<? printf ("%02.2f",$vat); ?>
<? printf ("%02.2f",$total); ?>

http://php.net/printf
http://php.net/sprintf

siwis

Originally posted by nationwide
//the output
<?=$subtotal?>
<?=$vat?>
<?=$total?>

Don't fret it:

$subtotal = number_format($subtotal, 2, '.', '');
$vat = number_format($vat, 2, '.', '');
$total = number_format($total, 2, '.', '');

nationwide

Danny, Your the Man...

Thanks M8, works great.

nationwide

Thanks siwis, not tried that one yet, but will now out of interest.

Not trying to pit you against each other, but is there any reason why one should be better than the other. The suggestion Danny made has worked!

Cheers Experts

siwis

For the record, either posted method will work.

dannys

They both do the same in this instance. However, printf allows for multiple inputs and can do some quite nice stuff.

number_format() is possibly more tailored to your need in this instance - but I use printf quite often so it was what I first thought of.

siwis

The only potential benefit I could see of the method I employ is that once you've run the predefined php function number_format() on your double value, the variable retains that value and formatting, whereas the method suggested by danny formats the numeric string for that particular instance.

However, if you were required to perform subsequent numeric calculations upon those variables, ie in the case of a shopping basket etc where someone might change the contents of their basket, each calculation you make results in greater innacuracy because no rounding occurs. Therefore Danny's method would probably be better to use in that instance.

But, it is entirely up 2 you which method you employ.

nationwide

You cant beat Quality Help and Advice...

Cheers All for the Info.