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Bug #25953 mb_eregi_replace() is not case-insensitive for multibyte characters.
Submitted: 2003-10-22 10:16 UTC Modified: 2003-10-24 13:35 UTC
Votes:14
Avg. Score:4.2 ± 1.1
Reproduced:13 of 13 (100.0%)
Same Version:1 (7.7%)
Same OS:1 (7.7%)
From: kirill at digicol dot de Assigned:
Status: Wont fix Package: mbstring related
PHP Version: 4.3.4RC2 OS: Linux Suse SuSE 8.2
Private report: No CVE-ID: None
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 [2003-10-22 10:16 UTC] kirill at digicol dot de 
Description:
------------
The function mb_eregi_replace() is not caseinsensitive for multibyte characters.

This bug is in PHP 4.3.3 as well.

Reproduce code:
---------------
<?php
mb_regex_encoding('UTF-8');

$pattern = utf8_encode('?');
$replace = 'X';
$subject = utf8_encode('?BER ?ber');

$result = mb_eregi_replace($pattern, $replace, $subject);

echo utf8_decode($result) . "\n";
?>

Expected result:
----------------
XBER Xber

Actual result:
--------------
?BER Xber

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 [2003-10-24 13:35 UTC] moriyoshi@php.net 
As of the current regex engine used by mbstring extension, all of the cyrillic / greek / arabic characters and some alphabetical characters that are not part of ascii character set such as a-umlaut (?) aren't handled correctly under case-insensitive mode. Probably the issue will be resolved in php5.
 [2012-08-22 11:49 UTC] iam at xatory dot ru 
You can replace mb_eregi_replace with preg_replace with u modifier.

Example (utf-8 file encoding):
<?php
echo preg_replace('/(юникод)/iu', '<b>\\1</b>', 'Юникод удобен');
?>

As expected result is:
<b>Юникод</b> удобен
 
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