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

go to bug id or search bugs for

Bug #50745 INF==INF evals to FALSE
Submitted: 2010-01-14 08:33 UTC Modified: 2010-01-14 10:09 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:0 of 0 (0.0%)
From: alvaro at demogracia dot com Assigned:
Status: Not a bug Package: Scripting Engine problem
PHP Version: 5.3.2RC1 OS: Windows
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: alvaro at demogracia dot com
New email:
PHP Version: OS:

 

 [2010-01-14 08:33 UTC] alvaro at demogracia dot com 
Description:
------------
The INF==INF comparison evals to FALSE in 5.3.1 and 5.3.2RC1 Windows releases. It used to be TRUE in previous versions including 5.3.0 and 5.2.11. I've tested it in Windows XP and Windows Server 2008.

It's also FALSE in 5.2.10 under Red Hat Enterprise Linux 5.

The strict comparison INF===INF evals to TRUE in all cases.

Please note I'm referring to the INF numeric constant, not an 'INF' string.

Reproduce code:
---------------
<?php

var_dump(INF==INF);

?>


Expected result:
----------------
bool(true)

Actual result:
--------------
bool(false)

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2010-01-14 10:09 UTC] jani@php.net 
This is because there was bug in handling INF (and NaN) in Windows prior to 5.3.1 which was fixed. And yes, that's the _expected_ result too. You can't compare infinity to infinity.
 
PHP Copyright © 2001-2025 The PHP Group
All rights reserved. 		Last updated: Sat Dec 06 09:00:02 2025 UTC