PHP :: Bug #40441 :: mbstring function overloading turns on randomly

Bug #40441	mbstring function overloading turns on randomly
Submitted:	2007-02-12 08:48 UTC	Modified:	2007-02-12 10:15 UTC
From:	dmitry at rsl dot ru	Assigned:
Status:	Not a bug	Package:	mbstring related
PHP Version:	5.2.1	OS:	linux
Private report:	No	CVE-ID:	None

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[2007-02-12 08:48 UTC] dmitry at rsl dot ru

Description:
------------
Just like http://bugs.php.net/bug.php?id=39361 with exception that mbstring.func_overload is set to 2 globaly, but disabled for virtualhost. This leads mbstring function overloading to be enabled randomly.
Try to visit and then refresh http://www.projectharmony.ru/temp-images/q.php several times.
http://www.projectharmony.ru/temp-images/qq.php is the same script plus phpinfo();

Reproduce code:
---------------
<? if (strstr('','')) { } ?>

Expected result:
----------------
nothing expected

Actual result:
--------------
randomly:
Warning:  mb_strstr() [function.mb-strstr]: Empty delimiter. in q.php on line 1
-- or  --
nothing (as expected)
-- or  --
Warning:  strstr() [function.strstr]: Empty delimiter. in /home/html/www.projectharmony.ru/temp-images/q.php on line 1 (rare)

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[2007-02-12 08:56 UTC] tony2001@php.net

Not enough information was provided for us to be able
to handle this bug. Please re-read the instructions at
http://bugs.php.net/how-to-report.php

If you can provide more information, feel free to add it
to this bug and change the status back to "Open".

Thank you for your interest in PHP.

[2007-02-12 09:13 UTC] dmitry at rsl dot ru

how I can provide more information than phpinfo() at http://www.projectharmony.ru/temp-images/qq.php?

[2007-02-12 09:21 UTC] tony2001@php.net

Duplicate of bug #38670.

[2007-02-12 09:46 UTC] dmitry at rsl dot ru

I'm not sure that this is duplicate of bug #38670, since we not using safe mode at all. I think that this bug is a kind of http://bugs.php.net/bug.php?id=39361.

The problem is that mbstring.function_overload is set to 0 for apache's virtualhost (while mbstring.function_overload = 2 in php.ini), but strstr (and probably others) still overloaded, not always but randomly. No matter if strstr got overloaded or not, ini_get('mbstring.function_overload') is equal to 0 for this virtualhost.

[2007-02-12 09:52 UTC] tony2001@php.net

This Apache2-related problem is described in details in bug #38670. 

>since we not using safe mode at all
safe_mode is just an INI setting, as well as mbstring.func_overload.

[2007-02-12 10:10 UTC] dmitry at rsl dot ru

Does your answer mean that any php_value option in .htaccess could be randomly ignored by php when it is built as apache2 module?

[2007-02-12 10:15 UTC] tony2001@php.net

My answer means that if you set/unset INI values between virtualhosts, Apache may not reinitialize environment betwene requests.

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