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Bug #14942 Logical bitwise operator not functioning correctly
Submitted: 2002-01-08 22:21 UTC Modified: 2002-01-09 00:47 UTC
From: mchiba at cisco dot com Assigned:
Status: Closed Package: Variables related
PHP Version: 4.0.6 OS: Linux Redhat 7.2
Private report: No CVE-ID: None
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From: mchiba at cisco dot com
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 [2002-01-08 22:21 UTC] mchiba at cisco dot com
I have two variables that I am trying to logically 'AND' in a bitwise fashion.  This does not work correctly if one of the variables is initialized to 0xffffffff.

ie if $field and $flags are two variables:

$flags = 0xffffffff;
$field = 0x01;

($flags & $field)? $str = "TRUE" : $str = "FALSE";

echo "$str <br>";

This prints 'FALSE' instead of 'True'!!  I tried debugging it with different values and it seems that if the highest bit is set then the it does the wrong thing.  ie. if $flags is instead initialized to 0x7fffffff then everything works fine!

Here is phpinfo on my system:

Thanks,
Murtaza

PHP Version 4.0.6

System Linux porky.devel.redhat.com 2.4.5-7smp #1 SMP Tue Jun 26 14:19:49 EDT 2001 i686 unknown
Build Date Aug 27 2001
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 [2002-01-09 00:47 UTC] mfischer@php.net
This is fixed in > 4.0.6.
 
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