ID: 29758
User updated by: bd at avatartechnology dot com
Reported By: bd at avatartechnology dot com
-Status: Bogus
+Status: Open
Bug Type: Performance problem
Operating System: Linux RedHat 7.3
PHP Version: 4.3.8
New Comment:
$free_shipping = true;
$residential_fee = 'Y';
$free_shipping = $free_shipping and ($residential_fee == 'N');
printf("free = %d",$free_shipping);
This code fails too. As stated in my previous comments priority of
operators is not an issue. "and" is producing wrong results. Even if
priority was an issue with the previous code example, the result should
still be false. The 'and' operator is IGNORING conditionals after it,
which is a PHP bug.
Previous Comments:
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[2004-08-19 16:33:02] [EMAIL PROTECTED]
Sorry, but your problem does not imply a bug in PHP itself. For a
list of more appropriate places to ask for help using PHP, please
visit http://www.php.net/support.php as this bug system is not the
appropriate forum for asking support questions.
Thank you for your interest in PHP.
No, && and and have a different priority (compare to = and ==).
http://no.php.net/manual/en/language.operators.php#language.operators.precedence
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[2004-08-19 15:54:45] bd at avatartechnology dot com
Description:
------------
Ran into a situation where code that utilized the operator 'and'
produced erroneous results.
$free_shipping = true;
$add_fee = 'Y';
$free_shipping = $free_shipping and $add_fee == 'N';
This was producing the result where $free_shipping was always true.
Adding parenthesis makes no difference in result.
--------------
$free_shipping = true;
$residential_fee = 'Y';
$free_shipping = $free_shipping && $residential_fee == 'N';
This accurately produces the correct results.
--------------
According to the documentation on PHP website 'and' and '&&' should be
used interchangably with same results.
Reproduce code:
---------------
$free_shipping = true;
$residential_fee = 'Y';
$free_shipping = $free_shipping and $residential_fee == 'N';
printf("free = %d",$free_shipping);
Expected result:
----------------
free = 0
Actual result:
--------------
free = 1
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Edit this bug report at http://bugs.php.net/?id=29758&edit=1
