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Bug #69267 mb_strtolower fails on titlecase characters
Submitted: 2015-03-20 02:48 UTC Modified: -
Votes:2
Avg. Score:3.0 ± 2.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: z dot figura12 at gmail dot com Assigned:
Status: Closed Package: mbstring related
PHP Version: 5.5Git-2015-03-20 (Git) OS: Kubuntu 14.10
Private report: No CVE-ID: None
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 [2015-03-20 02:48 UTC] z dot figura12 at gmail dot com 
Description:
------------
Ancient Greek characters with hypogegrammene (ᾼ ῼ ῌ etc.) are classified as titlecase characters in Unicode, and because they are not marked as being capital letters, are ignored by mb_strtolower.

Test script:
---------------
echo mb_strtolower("ᾼ");

Expected result:
----------------
ᾳ

Actual result:
--------------
ᾼ

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 [2016-10-01 03:22 UTC] z dot figura12 at gmail dot com 
After looking, there are actually two parts to this bug. One part is in PHP, and I was easily able to locate the error. However, this only fixed the characters Dž, Nj, Lj, Dz, whereas Greek characters with hypogegrammene were still broken.

The second part was traceable back to OpenLDAP. I have submitted a patch there and hope to see it accepted. I am not sure how to propagate this change to PHP, however.
 [2017-07-23 13:37 UTC] nikic@php.net 
Automatic comment on behalf of nikita.ppv@gmail.com
Revision: http://git.php.net/?p=php-src.git;a=commit;h=077e61fad3c5fbdbe8df4371b88f64bcc4a6bccd
Log: Fixed bug #69267 completely
 [2017-07-23 13:37 UTC] nikic@php.net
-Status: Open +Status: Closed
 
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