Re: [PHP] Working with internal data formats

[Robert Cummings <robert@xxxxxxxxxxxxx>]

On Thu, 2008-05-15 at 10:33 -0400, John Gunther wrote:
> Iv Ray wrote:
> > John Gunther wrote:
> >  > What technique can I use to take an 8-byte double precision value, as
> >  > stored internally, and assign its value to a PHP float variable without
> >  > having the bytes misinterpreted as a character string.
> > 
> > Does it get misinterpreted, or do you just want to be sure?
> > 
> > The documentation says -
> > 
> > "Some references to the type "double" may remain in the manual. Consider 
> > double the same as float; the two names exist only for historic reasons."
> > 
> > Does this cover your case?
> > 
> > Iv
> No.
> 
> Example: I extract the 8 bytes 40 58 FF 5C 28 F5 C2 8F from an external 
> file, which is the internal double precision float representation of the 
> decimal value 99.99. Starting with that byte string, how can I create a 
> PHP variable whose value is 99.99?

http://www.php.net/manual/en/function.unpack.php

Cheers,
Rob.
-- 
http://www.interjinn.com
Application and Templating Framework for PHP


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