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

go to bug id or search bugs for

Bug #67762 in_array evaluates as true when it should not
Submitted: 2014-08-04 23:30 UTC Modified: 2014-08-05 17:25 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:0 of 0 (0.0%)
From: jv at vip dot ie Assigned:
Status: Not a bug Package: *General Issues
PHP Version: Irrelevant OS:
Private report: No CVE-ID: None
View Developer Edit
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: jv at vip dot ie
New email:
PHP Version: OS:

 

 [2014-08-04 23:30 UTC] jv at vip dot ie 
Description:
------------
---
From manual page: http://www.php.net/function.in-array
---

The result will output true, when it should output false.

Yup, this is a pretty fundamental bug ;)

Test script:
---------------
$correct_answers = array('meter');
$my_answer = 0;
echo in_array($my_answer, $correct_answers);

Expected result:
----------------
false

Actual result:
--------------
true

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2014-08-04 23:44 UTC] requinix@php.net
-Status: Open +Status: Not a bug
 [2014-08-04 23:44 UTC] requinix@php.net 
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

Fundamental bugs are easy to find when you don't read the documentation.

> Searches haystack for needle using loose comparison unless strict is set.
Loose comparison, where "meter" == 0.
If you want a strict comparison to get "meter" !== 0 then pass $strict=true.
 [2014-08-05 14:59 UTC] xjsv24 at gmail dot com 
This looks like a bug to me. It breaks the transitive property.

if(0 == null) {
   echo "1<br>";
}

if(0 == "meter") {
   echo "2<br>";
}

if(null == "meter") {
   echo "3<br>";
}

Expected result:
----------------
1

Actual result:
--------------
1
2
 [2014-08-05 17:25 UTC] requinix@php.net 
That would be loose typing and loose comparisons. Still not a bug.
http://php.net/manual/en/types.comparisons.php
 
PHP Copyright © 2001-2024 The PHP Group
All rights reserved. 		Last updated: Fri Nov 22 00:01:30 2024 UTC