#26122 [Opn->Bgs]: Logical Operator "and" not functioning as expected

From: Date: Tue, 04 Nov 2003 21:08:09 +0000
Subject: #26122 [Opn->Bgs]: Logical Operator "and" not functioning as expected
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-49989@lists.php.net to get a copy of this message 
 ID:               26122
 Updated by:       iliaa@php.net
 Reported By:      iam at nimajneb dot com
-Status:           Open
+Status:           Bogus
 Bug Type:         Math related
 Operating System: Mac OSX 10.2.6
 PHP Version:      4.3.2
 New Comment:

Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to
report
a bug at http://bugs.php.net/how-to-report.php

'and' is equivalent to &, which is a bitwise operator. && is something
else entirely.


Previous Comments:
------------------------------------------------------------------------

[2003-11-04 16:00:50] iam at nimajneb dot com

Description:
------------
Result of 'and' operator not what is expected. 1 and 0 and 1 => 1?
Should be 0. See attached code sample. '&&' operator does function
correctly however.

Reproduce code:
---------------
    $primary_err_valid = (($_POST['primary_err'] != "category") and
($_POST['primary_err'] != "separator"));
    $secondary_err_valid = (($_POST['secondary_err'] != "category") and
($_POST['secondary_err'] != "separator"));
    $tertiary_err_valid = (($_POST['tertiary_err'] != "category") and
($_POST['tertiary_err'] != "separator"));
    $error_valid = ($primary_err_valid) and ($secondary_err_valid) and
($tertiary_err_valid);

	echo "Pri: $primary_err_valid <br>";
	echo "Sec: $secondary_err_valid <br>";
	echo "Tri: $tertiary_err_valid <br>";
	echo "Total Error: $error_valid <br>";


Expected result:
----------------
Pri: 1
Sec: 
Tri: 1
Total Error: 

Actual result:
--------------
Pri: 1
Sec: 
Tri: 1
Total Error: 1


------------------------------------------------------------------------


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