#45850 [NEW]: preg_split don't split correctly the sequence "\n\t" with the u modifier

From:             thunder013 at yopmail dot com
Operating system: Linux *AND* Windows
PHP version:      5.2.6
PHP Bug Type:     PCRE related
Bug description:  preg_split don't split correctly the sequence "\n\t" with the u modifier

Description:
------------
I want to use preg_split with the u modifier to split a UTF-8 string by
each character, like that: preg_split('//u', $txt, -1,
PREG_SPLIT_NO_EMPTY);

It works fine, however, there is a bug when the string contains the
sequence "\n\t" (0x0A09 in hex): the two characters are NOT splitted (see
the example attached).

Note that this bug isn't present when preg_split is used whithout the u
modifier.

This bug was reported previously here for version 5.2.4:
http://bugs.php.net/bug.php?id=42737, but netherless is *still* present in
version 5.2.5 and 5.2.6!

Reproduce code:
---------------
<?

        $txt = "abc\n\txyz!";
        $tab = preg_split('//u', $txt, -1, PREG_SPLIT_NO_EMPTY);
        print_r($tab);
        echo '$tab[3]: len = ', strlen($tab[3]), ', hex = ',
bin2hex($tab[3]), "\n";
?>


Expected result:
----------------
Array
(
    [0] => a
    [1] => b
    [2] => c
    [3] => 

    [4] => 	
    [5] => x
    [6] => y
    [7] => z
    [8] => !
)
$tab[3]: len = 1, hex = 0a


Actual result:
--------------
$ php test.php
Array
(
    [0] => a
    [1] => b
    [2] => c
    [3] => 
	
    [4] => x
    [5] => y
    [6] => z
    [7] => !
)
$tab[3]: len = 2, hex = 0a09

-- 
Edit bug report at http://bugs.php.net/?id=45850&edit=1
-- 
Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=45850&r=trysnapshot52
Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=45850&r=trysnapshot53
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Fixed in CVS:                 http://bugs.php.net/fix.php?id=45850&r=fixedcvs
Fixed in release:             http://bugs.php.net/fix.php?id=45850&r=alreadyfixed
Need backtrace:               http://bugs.php.net/fix.php?id=45850&r=needtrace
Need Reproduce Script:        http://bugs.php.net/fix.php?id=45850&r=needscript
Try newer version:            http://bugs.php.net/fix.php?id=45850&r=oldversion
Not developer issue:          http://bugs.php.net/fix.php?id=45850&r=support
Expected behavior:            http://bugs.php.net/fix.php?id=45850&r=notwrong
Not enough info:              http://bugs.php.net/fix.php?id=45850&r=notenoughinfo
Submitted twice:              http://bugs.php.net/fix.php?id=45850&r=submittedtwice
register_globals:             http://bugs.php.net/fix.php?id=45850&r=globals
PHP 4 support discontinued:   http://bugs.php.net/fix.php?id=45850&r=php4
Daylight Savings:             http://bugs.php.net/fix.php?id=45850&r=dst
IIS Stability:                http://bugs.php.net/fix.php?id=45850&r=isapi
Install GNU Sed:              http://bugs.php.net/fix.php?id=45850&r=gnused
Floating point limitations:   http://bugs.php.net/fix.php?id=45850&r=float
No Zend Extensions:           http://bugs.php.net/fix.php?id=45850&r=nozend
MySQL Configuration Error:    http://bugs.php.net/fix.php?id=45850&r=mysqlcfg