From:             
Operating system: OS X 10.6.4
PHP version:      Irrelevant
Package:          Strings related
Bug Type:         Bug
Bug description:substr() and $string[n] corrupt multi-byte UTF-8 strings

Description:
------------
(PHP 5.3.2 (cli) (built: Aug  7 2010 00:04:41) 

Copyright (c) 1997-2010 The PHP Group

Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies)



When trying to extract a single character from a UTF-8-encoded Japanese
string, instead of the expected character, one gets the dreaded
black-diamond-question-mark-of-death.





Test script:
---------------
$s_string = "静岡は蒸し暑いです。";

echo $s_string[3], "<p />";

// expected output is 蒸

// actual output is �

print_r($s_string[3]);

// expected output is 蒸

// actual output is �

echo "<p />";

$sub = substr($s_string, 3, 1);

echo $sub, "<p />";

// expected output is 蒸

// actual output is �

Expected result:
----------------
Expected output is 蒸





Actual result:
--------------
Actual output is �



-- 
Edit bug report at http://bugs.php.net/bug.php?id=52810&edit=1
-- 
Try a snapshot (PHP 5.2):            
http://bugs.php.net/fix.php?id=52810&r=trysnapshot52
Try a snapshot (PHP 5.3):            
http://bugs.php.net/fix.php?id=52810&r=trysnapshot53
Try a snapshot (trunk):              
http://bugs.php.net/fix.php?id=52810&r=trysnapshottrunk
Fixed in SVN:                        
http://bugs.php.net/fix.php?id=52810&r=fixed
Fixed in SVN and need be documented: 
http://bugs.php.net/fix.php?id=52810&r=needdocs
Fixed in release:                    
http://bugs.php.net/fix.php?id=52810&r=alreadyfixed
Need backtrace:                      
http://bugs.php.net/fix.php?id=52810&r=needtrace
Need Reproduce Script:               
http://bugs.php.net/fix.php?id=52810&r=needscript
Try newer version:                   
http://bugs.php.net/fix.php?id=52810&r=oldversion
Not developer issue:                 
http://bugs.php.net/fix.php?id=52810&r=support
Expected behavior:                   
http://bugs.php.net/fix.php?id=52810&r=notwrong
Not enough info:                     
http://bugs.php.net/fix.php?id=52810&r=notenoughinfo
Submitted twice:                     
http://bugs.php.net/fix.php?id=52810&r=submittedtwice
register_globals:                    
http://bugs.php.net/fix.php?id=52810&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=52810&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=52810&r=dst
IIS Stability:                       
http://bugs.php.net/fix.php?id=52810&r=isapi
Install GNU Sed:                     
http://bugs.php.net/fix.php?id=52810&r=gnused
Floating point limitations:          
http://bugs.php.net/fix.php?id=52810&r=float
No Zend Extensions:                  
http://bugs.php.net/fix.php?id=52810&r=nozend
MySQL Configuration Error:           
http://bugs.php.net/fix.php?id=52810&r=mysqlcfg

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