Re: unpack() big endian signed long?

["Nathan Nobbe" <quickshiftin@xxxxxxxxx>]

On Jan 23, 2008 3:38 PM, Floor Terra <floort@xxxxxxxxx> wrote:

> Hi,
>
> Is it possible to use unpack() to read a big endian signed long
> on a little endian machine?
> http://nl.php.net/pack refers to perl, on wich this function is based.
> The php function unpack() doesn't seem to support the "<" and ">"
> modifiers like perl does.


did you see this in the comments on that page?

 *info at dreystone dot com*
04-May-2005 02:31
<http://us.php.net/manual/en/function.unpack.php#52527> Here is my
solution to reading a Big-Endian formatted double on an
Little-Endian machine.

<?php

function ToDouble($data) {
    $t = unpack("C*", pack("S*", 256));
    if($t[1] == 1) {
        $a = unpack("d*", $data);
    } else {
        $a = unpack("d*", strrev($data));
    }
    return (double)$a[1];
}

?>

-nathan