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Bug #41814 String comparison changed
Submitted: 2007-06-26 18:46 UTC Modified: 2007-06-27 09:23 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: thomas dot hebinck at digionline dot de Assigned:
Status: Not a bug Package: Scripting Engine problem
PHP Version: 5.2.3 OS: Linux
Private report: No CVE-ID: None
View Developer Edit
 [2007-06-26 18:46 UTC] thomas dot hebinck at digionline dot de 
Description:
------------
The behaviour of the comparison of strings containing integers changed from PHP 5.2.0 to 5.2.1.

Reproduce code:
---------------
echo (int)('0x100000000000000000'=='0x100000000000000001');

Expected result:
----------------
0 // this was the result in PHP <= 5.2.0

Actual result:
--------------
1

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 [2007-06-27 08:23 UTC] tony2001@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

You are comparing two numeric strings.
http://www.php.net/manual/en/language.operators.comparison.php
 [2007-06-27 09:10 UTC] thomas dot hebinck at digionline dot de 
The problem is, that the behaviour changed from 5.2.0. to 5.2.1. 
The two integers are not the same - they are just both out of range.
It seems that PHP 5.2.0 didn't convert strings with out of range integers to integer while comparing, but PHP 5.2.1 does.
 [2007-06-27 09:23 UTC] tony2001@php.net 
The current behaviour is correct.

>The two integers are not the same
They are not integers in the first place, they are floats.
Remove the quotes and you'll get the very same result.
 
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