The big warning box on the float type page (http://php.net/float) suggest bc 
(http://www.php.net/manual/en/ref.bc.php)

---
Simon Welsh
Sent from my iPad

On 7/09/2010, at 17:12, Michael Adams <[email protected]> wrote:

> 
> In Javascript i solved this issue (after two years) by using:
> 
> ****
> function round(number) {
>       return parseFloat(number.toPrecision(12));
> }
> ****
> 
> The "toPrecision(12)" rounds to 12 significant digits which is well within 
> acceptable tolerances for my practical application:
> http://www.quickconvert.net/index.html
> http://www.quickconvert.net/javascript/calculate.js
> 
> It does however leave trailing zeros below the decimal point. I 
> found "parseFloat()" stripped those nicely.
> 
> Is there a PHP equivalent way to tidy double float math? I intend to offer a 
> real form alternative to those not using Javascript on this site.
> 
> -- 
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