Posted by tim on 05/29/06 06:57

lorento wrote:
> >From the php manual :
> The returned float has a precision based on the precision directive in
> php.ini, which defaults to 14.
>

The precision setting alters the number of digits displayed in echo
statements but it does not affect the precision of floating points
calculations.

>From the manual
http://www.php.net/manual/en/language.types.float.php
The size of a float is platform-dependent, although a maximum of
~1.8e308 with a precision of roughly 14 decimal digits is a common
value (that's 64 bit IEEE format).

For higher accuracy a software math library is needed. Bcmath does
this, slowly...

Regards

Tim

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