#20673 [Opn->Ver]: Inexplicable arithmetical error due to references
| From: | iliaa@php.net | Date: | Fri, 29 Nov 2002 04:03:32 +0000 |
| Subject: | #20673 [Opn->Ver]: Inexplicable arithmetical error due to references | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-26128@lists.php.net to get a copy of this message | ||
ID: 20673
Updated by: iliaa@php.net
Reported By: dakota@dir.bg
-Status: Open
+Status: Verified
Bug Type: Scripting Engine problem
-Operating System: Win 2000 NT
+Operating System: Win 2000 NT/Linux
-PHP Version: 4.2.1
+PHP Version: 4.3.0-dev/4.4.0-dev
Previous Comments:
------------------------------------------------------------------------
[2002-11-27 07:04:52] dakota@dir.bg
<?
$a = 7;
$a = $a + $a++;
echo $a;
//the result is 14;
?>
When I add a reference to $a, the behavior of $a + $a++ becomes
inexplicable different. Note that $a isn't changed anywhere!
<?
$a = 7;
$b =& $a;
$a = $a + $a++;
echo $a;
//the result is 15;
?>
The only difference is $b =& $a, but why $a takes care of references to
itself?
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=20673&edit=1