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Bug #50184 Constants can be redefined
Submitted: 2009-11-16 01:44 UTC Modified: 2009-11-25 10:01 UTC
From: goatlabs at gmail dot com Assigned:
Status: Closed Package: Scripting Engine problem
PHP Version: 5.3.0 OS: OSX 10.6.2; Debian Linux 5.0.3
Private report: No CVE-ID: None
View Developer Edit
 [2009-11-16 01:44 UTC] goatlabs at gmail dot com 
Description:
------------
define() constants can be modified if originally defined case-sensitive

Reproduce code:
---------------
define('TEST', 'foo', true);
var_dump(TEST);
define('TEST', 'bar');
var_dump(TEST);





Expected result:
----------------
string(3) "foo"
string(3) "foo"

Actual result:
--------------
string(3) "foo"
string(3) "bar"

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 [2009-11-16 03:59 UTC] goatlabs at gmail dot com 
Note: the description should read:

define() constants can be modified if originally defined "case-INsensitive"
 [2009-11-16 09:35 UTC] jani@php.net 
From manual notes:

A note on redefining:

Constants can't be redefined:

$ php -r "define('A', 1); var_dump('A'); define('A', 2); var_dump('A');";
string(1) "A"
PHP Notice:  Constant A already defined in Command line code on line 1
string(1) "A"

But using the case insensitive setting shows that the internal
representation is lower case:

$ php -r "define('A', 1, true); var_dump('A'); define('A', 2); var_dump('A');";
string(1) "A"
string(1) "A"

Note the lower case 'a' in the second define() here:
$ php -r "define('A', 1, true); var_dump('A'); define('a', 2); var_dump('A');";
string(1) "A"
PHP Notice:  Constant a already defined in Command line code on line 1
string(1) "A"

(Short version: Yes, but no)
 [2009-11-25 09:59 UTC] svn@php.net 
Automatic comment from SVN on behalf of vrana
Revision: http://svn.php.net/viewvc/?view=revision&revision=291296
Log: Case-insensitive are lower-case (bug #50184)
 [2009-11-25 10:01 UTC] vrana@php.net 
This bug has been fixed in the documentation's XML sources. Since the
online and downloadable versions of the documentation need some time
to get updated, we would like to ask you to be a bit patient.

Thank you for the report, and for helping us make our documentation better.
 
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