Bug #66108 [Com]: Setting locale to 'tr_TR' lowercases parts of constants

From: Date: Wed, 10 Sep 2014 14:51:14 +0000
Subject: Bug #66108 [Com]: Setting locale to 'tr_TR' lowercases parts of constants
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-187503@lists.php.net to get a copy of this message 
Edit report at https://bugs.php.net/bug.php?id=66108&edit=1

 ID:                 66108
 Comment by:         chuanm at gmail dot com
 Reported by:        t dot baumgarden at web dot de
 Summary:            Setting locale to 'tr_TR' lowercases parts of
                     constants
 Status:             Open
 Type:               Bug
 Package:            Scripting Engine problem
 Operating System:   CentOS 6
 PHP Version:        5.5.6
 Block user comment: N
 Private report:     N

 New Comment:

I think this bug also affects preg_match() function while using the case insensitive match modifier.
Seems only letter 'i' has the problem. See example below: 

<?php

setlocale(LC_ALL, 'tr_TR.UTF-8');
var_dump(preg_match('/I/i', 'production'));   // output: no match found (WRONG)
var_dump(preg_match('/O/i', 'production'));   // output: one match found
(correct)


Previous Comments:
------------------------------------------------------------------------
[2013-11-17 18:57:47] t dot baumgarden at web dot de

In short:

setlocale(LC_ALL, 'tr_TR.UTF-8');
echo strtoupper('production');

Result: "PRODUCTiON" with wrong "i"

------------------------------------------------------------------------
[2013-11-17 18:41:21] t dot baumgarden at web dot de

Description:
------------
Hi. The (same?) bug was closed long time before here: https://bugs.php.net/bug.php?id=18556

Now its back in php 5.5.6.

Write

setlocale(LC_ALL, 'tr_TR.UTF-8');

I get:

constant(): Couldn't find constant test::PRODUCTiON

and complete page is broken.

See "i" in "PRODUCTiON". Change 'tr_TR.UTF-8' to another string like
'en_US.UTF-8' now its working fine.

Test script:
---------------
class test {
	const PRODUCTION  = 20;
    public static $environment = 10;
}
test::$environment = constant('test::'.strtoupper('production'));
echo (test::$environment);


Expected result:
----------------
20

Actual result:
--------------
Error message: constant(): Couldn't find constant test::PRODUCTiON


------------------------------------------------------------------------



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