php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #79941 If statement comparison bug
Submitted: 2020-08-07 05:00 UTC Modified: 2020-08-07 06:20 UTC
From: wdh at allcode dot io Assigned:
Status: Not a bug Package: Scripting Engine problem
PHP Version: Irrelevant OS: CentOS
Private report: No CVE-ID: None
View Developer Edit
 [2020-08-07 05:00 UTC] wdh at allcode dot io 
Description:
------------
In the test code,
if($k == 'ex') statement is malfunctioning.

the statement should be return true only at the 'ex' string, but also return true at the 0.

Test script:
---------------
$arr = [
  0 => 'a',
  1 => 'b',
  'ex' => 'c',
];

foreach($arr as $k => $v) {
  if($k == 'ex') {
    echo $k;
  }
}

Expected result:
----------------
ex

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

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2020-08-07 05:10 UTC] wdh at allcode dot io 
Not only in the foreach loop, the If statement produce the bug.

Test script:
---------------
$str = 'ex';
if($str == 0) {
  echo $str;
}

Expected result:
----------------
(no output)

Actual result:
--------------
ex
 [2020-08-07 05:11 UTC] wdh at allcode dot io
-Summary: If statement comparison bug in foreach loop +Summary: If statement comparison bug
 [2020-08-07 05:11 UTC] wdh at allcode dot io 
Not only in the foreach loop, the If statement produce the bug.
 [2020-08-07 06:20 UTC] cmb@php.net
-Status: Open +Status: Not a bug
 [2020-08-07 06:20 UTC] cmb@php.net 
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.  Due to the volume
of reports we can not explain in detail here why your report is not
a bug.  The support channels will be able to provide an explanation
for you.

Thank you for your interest in PHP.

By the way, the PHP version is not irrelevant in this case.
 [2020-08-08 12:37 UTC] a at b dot c dot de 
See also
https://wiki.php.net/rfc/string_to_number_comparison
 
PHP Copyright © 2001-2026 The PHP Group
All rights reserved. 		Last updated: Wed Oct 07 06:00:01 2026 UTC