A couple of points here... First, 0 is obviously wrong for
3221225472 1073741824
But I don't know how you got 2147483648 either.
I get 1073741824 as
3221225472 = 1100
1073741824 = 0100
1100
0100 =
0100
right?
Anyways, to your question =P
First, if you check here:
http://www.php.net/manual/en/language.types.integer.php
you will see that int's in PHP are always signed and that if
they exceed the max size for an int they are converted to a
float.
Try running this on your server
?php
$x = 3221225472;
$y = 1073741824;
echo x = ;
var_dump($x);
echo BR;
echo y = ;
var_dump($y);
?
I would be willing to bet that $x is a float and $y is an int, so
the bitwise operator can't compare them. The only
workaround I can offer you is this
?php
$x = 3221225472;
$y = 1073741824;
$x = decbin($x);
$y = decbin($y);
$bitand = bindec($x $y);
echo Bitwise and gives $bitand;
?
It's a bit kludgy but it forces both $x and $y to be compared
as binary numbers, which is what you want =)
Sheridan Saint-Michel
Website Administrator
FoxJet, an ITW Company
www.foxjet.com
- Original Message -
From: Alexey Prohorenko [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, August 28, 2001 1:47 PM
Subject: [PHP] LONGINT... ? to be or not to be?...
Hello,
I have one question. How can PHP work with longint (in C we call
them unsigned long) variables?
F.e., I want to do next thing:
65536 4096 = 0 (this is right)
65536 65536 = 65536 (again, everything is okay)
196608 65536 = 65536 (perfect, it works great)
but,
3221225472 1073741824 = 0 (this is wrong, right answer isn't 0
but 2147483648)
So, can anybody help me with this? Any suggestions?
Thanks, anyway. Looking forward your answers.
Will check my mailbox every 5 minutes. :-)
--
green
[http://www.extrasy.net]
[http://www.unix-how-to.net]
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