From:
Operating system: Debian 5.0.5
PHP version: 5.2.14
Package: Scripting Engine problem
Bug Type: Bug
Bug description:Logic operator failure
Description:
------------
We found a problem with the logical operators, exactly with the "||" and
the "OR" operators.
We think both of them are the same, except for the precedence of each one.
But when we run the script we show below, the results arent the same.
Is not a crash bug, but we found unexpected results using this operators.
Thanks in advance
Test script:
---------------
<?php
$a = false;
$b = true;
$c = true;
$res10 = $a || $b || $c;
$res11 = ($a || $b) || $c;
$res12 = $a || ($b || $c);
$res13 = ($a || $b || $c);
$res20 = $a OR $b OR $c;
$res21 = ($a OR $b) OR $c;
$res22 = $a OR ($b OR $c);
$res23 = ($a OR $b OR $c);
echo ' TEST || <br />';
echo (int)$a." || ".(int)$b." || ".(int)$c." = ".(int)$res10." <br />";
echo "(".(int)$a." || ".(int)$b.") || ".(int)$c." = ".(int)$res11." <br
/>";
echo (int)$a." || (".(int)$b." || ".(int)$c.") = ".(int)$res12." <br />";
echo "(".(int)$a." || ".(int)$b." || ".(int)$c.") = ".(int)$res13." <br
/>";
echo ' <br />';
echo ' TEST OR<br />';
echo (int)$a." OR ".(int)$b." OR ".(int)$c." = ".(int)$res20." <br />";
echo "(".(int)$a." OR ".(int)$b.") OR ".(int)$c." = ".(int)$res21." <br
/>";
echo (int)$a." OR (".(int)$b." OR ".(int)$c.") = ".(int)$res22." <br />";
echo "(".(int)$a." OR ".(int)$b." OR ".(int)$c.") = ".(int)$res23." <br
/>";
?>
Expected result:
----------------
We except the same result for all the comparators. We think it must be
"true" all of them
Actual result:
--------------
The result is unexpected. The result is not the same using an "OR" or a
"||", but it must be the same.
is not a precedence problem because we are using only one operator at the
same time.
--
Edit bug report at http://bugs.php.net/bug.php?id=53015&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=53015&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=53015&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=53015&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=53015&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=53015&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=53015&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=53015&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=53015&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=53015&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=53015&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=53015&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=53015&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=53015&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=53015&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=53015&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=53015&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=53015&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=53015&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=53015&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=53015&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=53015&r=mysqlcfg
