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Bug #51385 htmlentities next substr with UTF-8
Submitted: 2010-03-25 05:18 UTC Modified: 2010-03-25 07:47 UTC
From: baudav at gmail dot com Assigned:
Status: Not a bug Package: *Unicode Issues
PHP Version: 5.3.2 vc9-nts OS: W2k3 IIS6
Private report: No CVE-ID: None
 [2010-03-25 05:18 UTC] baudav at gmail dot com
substr not truncate UTF-8 correctly, and generate bad UTF-8 string.

test script must be writen in UTF-8

Test script:
$str = 'câble TOSLink mâle/mâle (1.5 à 25m)';
$etc = '...';

echo htmlentities(substr($str, 0, 33). $etc, ENT_QUOTES, 'UTF-8')


Expected result:
câble TOSLink mâle/mâle (1.5 ...

Actual result:
no return, just PHP error logged: 

PHP Warning:  htmlentities(): Invalid multibyte sequence in argument in C:\DATA\WWW\test.php on line 5

change substr($str, 0, 33) by substr($str, 0, 32), it's work


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 [2010-03-25 05:24 UTC]
-Status: Open +Status: Bogus
 [2010-03-25 05:24 UTC]
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at and the instructions on how to report
a bug at

Like most PHP functions, substr() is not multibyte-aware. You may prefer to use 
mb_substr() instead.
 [2010-03-25 05:27 UTC] baudav at gmail dot com
-Operating System: Windows 2003 +Operating System: W2k3 IIS6 -PHP Version: 5.3.2 +PHP Version: 5.3.2 vc9-nts
 [2010-03-25 05:27 UTC] baudav at gmail dot com
Windows 2003 with IIS6 fastcgi; PHP 5.3.1 or 5.3.2 vc9-nts
 [2010-03-25 07:47 UTC] baudav at gmail dot com
Oh! excuse for my incomplet report! Tested with substr and mb_substr; It's same with mb_string
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