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Bug #52592 mb_ereg_replace and the Greek capital Pi
Submitted: 2010-08-12 14:36 UTC Modified: 2010-08-13 06:50 UTC
From: pj at ezgr dot net Assigned:
Status: Not a bug Package: mbstring related
PHP Version: 5.2.14 OS: Centos 5.5 x64
Private report: No CVE-ID: None
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 [2010-08-12 14:36 UTC] pj at ezgr dot net
PHP: 5.2.14, Apache 2.2.15, mod_php

While \s is supposed to match all whitespace, the greek unicode letter Pi (Π) whose code is 0xCEA0 is matched too and if replaced with something, it's stripped of its second byte (0xA0).

Test script:

$testStr = 'Π  Π  Π!';
$newStr = mb_ereg_replace('\s+','_',$testStr);
echo $testStr;
echo $newStr;
echo urlencode($testStr);
echo urlencode($newStr);

Expected result:
Π  Π  Π!

Actual result:
Π  Π  Π!
[non printable character]_[non printable character]_[non printable character]!


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 [2010-08-13 06:50 UTC]
-Status: Open +Status: Bogus
 [2010-08-13 06:50 UTC]
You need to also call mb_regex_encoding('UTF-8'); before using a UTF-8 regular expression.
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