[PHP-BUG] Bug #53823 [NEW]: preg_replace: * qualifier on unicode replace garbacles the string

[keith at chaos-realm dot net]

From:             
Operating system: Linux
PHP version:      5.3SVN-2011-01-23 (snap)
Package:          Unicode Engine related
Bug Type:         Bug
Bug description:preg_replace: * qualifier on unicode replace garbacles the 
string

Description:
------------
When using the following test script to strip out all unicode except for
letters the string becomes garbled when the * qualifier is added, the only
surviving character that is intact is ú.



Also, if you add \pN to the exceptions it additionally preserves the ó.



Verified on 5.2,5.3 and 5.3-SNAP.



Test script:
---------------
echo preg_replace('/[^\pL\pM]*/iu', '', 'áéíóú');

or

echo preg_replace('/[^\pL\pM\pN]*/iu', '', 'áéíóú');

Expected result:
----------------
áéíóú

Actual result:
--------------
����ú

or 

���óú (if \pN is added to the exceptions).

-- 
Edit bug report at http://bugs.php.net/bug.php?id=53823&edit=1
-- 
Try a snapshot (PHP 5.2):            
http://bugs.php.net/fix.php?id=53823&r=trysnapshot52
Try a snapshot (PHP 5.3):            
http://bugs.php.net/fix.php?id=53823&r=trysnapshot53
Try a snapshot (trunk):              
http://bugs.php.net/fix.php?id=53823&r=trysnapshottrunk
Fixed in SVN:                        
http://bugs.php.net/fix.php?id=53823&r=fixed
Fixed in SVN and need be documented: 
http://bugs.php.net/fix.php?id=53823&r=needdocs
Fixed in release:                    
http://bugs.php.net/fix.php?id=53823&r=alreadyfixed
Need backtrace:                      
http://bugs.php.net/fix.php?id=53823&r=needtrace
Need Reproduce Script:               
http://bugs.php.net/fix.php?id=53823&r=needscript
Try newer version:                   
http://bugs.php.net/fix.php?id=53823&r=oldversion
Not developer issue:                 
http://bugs.php.net/fix.php?id=53823&r=support
Expected behavior:                   
http://bugs.php.net/fix.php?id=53823&r=notwrong
Not enough info:                     
http://bugs.php.net/fix.php?id=53823&r=notenoughinfo
Submitted twice:                     
http://bugs.php.net/fix.php?id=53823&r=submittedtwice
register_globals:                    
http://bugs.php.net/fix.php?id=53823&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=53823&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=53823&r=dst
IIS Stability:                       
http://bugs.php.net/fix.php?id=53823&r=isapi
Install GNU Sed:                     
http://bugs.php.net/fix.php?id=53823&r=gnused
Floating point limitations:          
http://bugs.php.net/fix.php?id=53823&r=float
No Zend Extensions:                  
http://bugs.php.net/fix.php?id=53823&r=nozend
MySQL Configuration Error:           
http://bugs.php.net/fix.php?id=53823&r=mysqlcfg