#45712 [Opn->Ctl]: $something == NaN returns true with 5.3, false with 5.2.*

[jani]

 ID:               45712
 Updated by:       [EMAIL PROTECTED]
-Summary:          $something == NaN returns true with PHP 5.3.0, which
                   returns false until 5.2.6
 Reported By:      for-bugs at hnw dot jp
-Status:           Open
+Status:           Critical
 Bug Type:         Variables related
-Operating System: MacOSX
+Operating System: *
 PHP Version:      5.3.0alpha1


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

[2008-08-05 02:39:58] for-bugs at hnw dot jp

Description:
------------
There is == operator's problem dealing with NaN(Not a Number) in PHP
5.3.0alpha1. This behavior is different with PHP 5.0.0-5.2.6, so this is
compatibility problem.

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

$nan = (-1e300*1e300)/(1e300*1e300); // float(NAN)

var_dump($nan=='');
var_dump($nan==0.5);
var_dump($nan==50);
var_dump($nan=='500');
var_dump($nan=='abc');
var_dump($nan==$nan);

Expected result:
----------------
bool(false)
bool(false)
bool(false)
bool(false)
bool(false)
bool(false)

Actual result:
--------------
bool(true)
bool(true)
bool(true)
bool(true)
bool(true)
bool(true)


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


-- 
Edit this bug report at http://bugs.php.net/?id=45712&edit=1