From:             arnaud dot lb at gmail dot com
Operating system: Any
PHP version:      5.2.5
PHP Bug Type:     Unicode Function Upgrades related
Bug description:  htmlspecialchars returns empty string on invalid unicode 
sequence

Description:
------------
htmlspecialchars/htmlentities returns an empty string when the input 
contains an invalid unicode sequence.

I think these functions should just skip the invalid sequences or 
encode them byte by byte (e.g. 0xE9 => é), instead of 
discarding the whole string.

Sometimes you have to display arbitrary strings of unknow encoding. 
So you make them more safe using htmlspecialchars($string, 
ENT_COMPAT, "site_encoding, utf-8 in my case"), but if there is at 
least one invalid sequence in the string, it returns an empty 
string :/

Reproduce code:
---------------
$string = "Voil\xE0"; // "VoilĂ ", in ISO-8859-15

var_dump(htmlspecialchars($string, ENT_COMPAT, "utf-8"));


Expected result:
----------------
string(4) "Voil"

OR 

string(10) "Voilà"

Actual result:
--------------
string(0) ""

-- 
Edit bug report at http://bugs.php.net/?id=43896&edit=1
-- 
Try a CVS snapshot (PHP 4.4): 
http://bugs.php.net/fix.php?id=43896&r=trysnapshot44
Try a CVS snapshot (PHP 5.2): 
http://bugs.php.net/fix.php?id=43896&r=trysnapshot52
Try a CVS snapshot (PHP 5.3): 
http://bugs.php.net/fix.php?id=43896&r=trysnapshot53
Try a CVS snapshot (PHP 6.0): 
http://bugs.php.net/fix.php?id=43896&r=trysnapshot60
Fixed in CVS:                 http://bugs.php.net/fix.php?id=43896&r=fixedcvs
Fixed in release:             
http://bugs.php.net/fix.php?id=43896&r=alreadyfixed
Need backtrace:               http://bugs.php.net/fix.php?id=43896&r=needtrace
Need Reproduce Script:        http://bugs.php.net/fix.php?id=43896&r=needscript
Try newer version:            http://bugs.php.net/fix.php?id=43896&r=oldversion
Not developer issue:          http://bugs.php.net/fix.php?id=43896&r=support
Expected behavior:            http://bugs.php.net/fix.php?id=43896&r=notwrong
Not enough info:              
http://bugs.php.net/fix.php?id=43896&r=notenoughinfo
Submitted twice:              
http://bugs.php.net/fix.php?id=43896&r=submittedtwice
register_globals:             http://bugs.php.net/fix.php?id=43896&r=globals
PHP 3 support discontinued:   http://bugs.php.net/fix.php?id=43896&r=php3
Daylight Savings:             http://bugs.php.net/fix.php?id=43896&r=dst
IIS Stability:                http://bugs.php.net/fix.php?id=43896&r=isapi
Install GNU Sed:              http://bugs.php.net/fix.php?id=43896&r=gnused
Floating point limitations:   http://bugs.php.net/fix.php?id=43896&r=float
No Zend Extensions:           http://bugs.php.net/fix.php?id=43896&r=nozend
MySQL Configuration Error:    http://bugs.php.net/fix.php?id=43896&r=mysqlcfg

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