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Bug #22415 strtolower()
Submitted: 2003-02-25 08:05 UTC Modified: 2003-02-25 12:43 UTC
From: admin at naxe dot net Assigned:
Status: Not a bug Package: Strings related
PHP Version: 4.3.0 OS: Linux Red Hat v7.3
Private report: No CVE-ID: None
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 [2003-02-25 08:05 UTC] admin at naxe dot net 
Hi,

I make massive use of PHP so I tested many times before report this that I think is a bug:

This is the example script:

$ch=chr(180);
echo $ch;
echo strtolower($ch);
echo strtoupper($ch);

The result will be this: ??? instead of this: ???

This bug seems that occur only with PHP v4.3.0, I tested it also with PHP v4.2.2 ad it was ok.

I uploaded the script on two different server of mine:

http://www.dez.it/test/strtolower.php here with PHP v4.2.2 (http://www.dez.it/test/phpinfo.php for phpinfo)

http://www.postare.it/test/strtolower.php here with PHP v4.3.0 (http://www.postare.it/test/phpinfo.php for phpinfo)

As said the first link works ok, the seconds has this strange behaviour, it modify chr(180) to chr(184). I haven't tested with all the ascii set.

I hope this report was useful.

Good debug.

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 [2003-02-25 08:18 UTC] hholzgra@php.net 
from the manual page on strtolower:
"Note that 'alphabetic' is determined by the current locale. "

are you sure that this is not just a locale settings problem?
 [2003-02-25 08:20 UTC] moriyoshi@php.net 
strtolower's behaviour depends on the locale settings (LC_CTYPE), and the settings are different on each server,
so the reported behaviour seems to be quite expectable for me. Setting LANG=C would solve your problem?
 [2003-02-25 08:24 UTC] moriyoshi@php.net 
And also try inserting

setlocale(LC_CTYPE, "C");

on top of your script.
 [2003-02-25 08:58 UTC] admin at naxe dot net 
Hi, thanks for your replies.

As you can see on my phpinfo() I have this environment setting:

LANG  it_IT@euro

I think it was from the Red Hat v7.3 installation.

I tested the script, as you suggested, with LANG=C (the same language settings that I have on the other server) and it works.

But I think that this behaviour is still very strange, why my setting of it_IT will produce this problem: strtolower(chr(180)) results in chr(184)?

I think this is an important issue for code portability.

Thanks.
 [2003-02-25 12:41 UTC] michael dot mauch at gmx dot de 
Your LANG it_IT@euro uses the ISO-8859-15 character set - that's the one with the Euro sign. At character position 180 it has a "Z" with a little "v" (caron) above, and at character position it has the "z" with the little "v" (caron) above - so strtolower() is correct.

See "man iso-8859-15", if your system has that man page.
 [2003-02-25 12:43 UTC] moriyoshi@php.net 
Marking as bogus because this is not a bug at all...
 
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