How to save numeric value as a 32bit number rather than string?

[Dave Turner]

<?
$fp = fopen ("binary.dat ", "wb");
$buffer = 12345;
fwrite ($fp, $buffer);
fclose($fp);
?>

That creates a file 5 bytes long that contains the text data "12345", but I
need it to save that value as 32-bits instead (so the file would just be 4
bytes, with the contents being 0x39300000).

Anyone know how to do that?

[ZeldorBlat]

Re: How to save numeric value as a 32bit number rather than string?

$someNum = 12345;

Convert to binary:
$binNum = base_convert($s omeNum, 10, 2);

Convert to hex:
$hexNum = base_convert($s omeNum, 10, 16);

http://www.php.net/manual/en/function.base-convert.php

[Andy Hassall]

Re: How to save numeric value as a 32bit number rather than string?

On Wed, 27 Apr 2005 02:00:50 +0800, "Dave Turner" <nobody@nowhere .nohow> wrote:
[color=blue]
><?
> $fp = fopen ("binary.dat ", "wb");
> $buffer = 12345;
> fwrite ($fp, $buffer);
> fclose($fp);
>?>
>
>That creates a file 5 bytes long that contains the text data "12345", but I
>need it to save that value as 32-bits instead (so the file would just be 4
>bytes, with the contents being 0x39300000).
>
>Anyone know how to do that?[/color]

http://uk.php.net/manual/en/function.pack.php

--
Andy Hassall / <andy@andyh.co. uk> / <http://www.andyh.co.uk >
<http://www.andyhsoftwa re.co.uk/space> Space: disk usage analysis tool

[Dave Turner]

Re: How to save numeric value as a 32bit number rather than string?

Thanks, but not quite what I meant. That converts the base, but it's still a
STRING ... ie. "11000000111001 "
I need to save that as just 32-bits, so the file should only be 4 bytes


"ZeldorBlat " <zeldorblat@gma il.com> wrote in message
news:1114539519 .183425.6840@g1 4g2000cwa.googl egroups.com...[color=blue]
> $someNum = 12345;
>
> Convert to binary:
> $binNum = base_convert($s omeNum, 10, 2);
>
> Convert to hex:
> $hexNum = base_convert($s omeNum, 10, 16);
>
> http://www.php.net/manual/en/function.base-convert.php
>[/color]

[Dave Turner]

Re: How to save numeric value as a 32bit number rather than string?

pack() is the one i'm after, thanks. :)