#44092 [Opn]: exp() function returns incorrect result if passed hex
| From: | zoe@php.net | Date: | Sun, 10 Feb 2008 17:27:41 +0000 |
| Subject: | #44092 [Opn]: exp() function returns incorrect result if passed hex | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-122154@lists.php.net to get a copy of this message | ||
ID: 44092
Updated by: zoe@php.net
Reported By: zoe@php.net
Status: Open
Bug Type: *Math Functions
Operating System: Linux 32
PHP Version: 5.3CVS-2008-02-10 (CVS)
New Comment:
If this patch goes in, the test exp_error.phpt will need a small change
too. I'm happy to do that.
Previous Comments:
------------------------------------------------------------------------
[2008-02-10 17:20:21] zoe@php.net
Description:
------------
In PHP5.3 is a hex string is passed to exp() it is interpreted as 0 and
the result of exp(0) = 1 is returned.
In PHP6 the hex string is correctly interpreted and the corrcet value
is returned by exp().
I believe the PHP6 behaviour is preferred.
This patch http://www.pastebin.ca/898812 corrects the
PHP5.3 behaviour.
Reproduce code:
---------------
--TEST--
Test exp() - pass exp hex string
--INI--
precision=14
--FILE--
<?php
$value= "0x5F";
$res = exp($value);
var_dump($res);
?>
--EXPECTF--
float(1.811239082889E+41)
Expected result:
----------------
See above
Actual result:
--------------
1
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=44092&edit=1