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Bug #40439 bit shift error
Submitted: 2007-02-12 00:36 UTC Modified: 2007-02-12 10:05 UTC
From: xris01 at free dot fr Assigned:
Status: Not a bug Package: Unknown/Other Function
PHP Version: 5.2.1 OS: Debian 3.1
Private report: No CVE-ID: None
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From: xris01 at free dot fr
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 [2007-02-12 00:36 UTC] xris01 at free dot fr 
Description:
------------
When using bit shifting (shift left) operation in 5.2.1, result is different (and false) compared to 5.1.6

Reproduce code:
---------------
$z = -2302452860;
$lr_z = (($z) << 4);

echo $lr_z;

Expected result:
----------------
1815459904

Actual result:
--------------
0

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 [2007-02-12 06:29 UTC] judas dot iscariote at gmail dot com 
/sapi/cli/php foo.php
-36839245760 64 bit system
 and 0 in 32 bit system here.
 [2007-02-12 09:23 UTC] tony2001@php.net 
On 32bit systems -2302452860 is a float, not integer.
 [2007-02-12 10:05 UTC] xris01 at free dot fr 
I see, but even though type is double, why are the result different ?
 
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