From:             eran at octabox dot com
Operating system: Windows XP Professional SP2
PHP version:      5.2.5
PHP Bug Type:     Feature/Change Request
Bug description:  htmlentities returns empty string when operation on a null 
value

Description:
------------
The htmlentities function returns an empty string when used on a null
value. This might seem irrelevant, however the htmlentities is used
regularly to escape data before using it in a database query. A null value
might be needed in such queries, and it would be preferred if it does not
need to be considered a special case if a part of an data escaping
routine.

For example, the Zend_Filter_Input component of the Zend_Framework uses
htmlentities as the default escape filter. Passing null values in an escape
routing would result in null values erroneously being converted to empty
strings. 

Reproduce code:
---------------
var_dump(htmlentities(null));

Expected result:
----------------
NULL

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

-- 
Edit bug report at http://bugs.php.net/?id=44585&edit=1
-- 
Try a CVS snapshot (PHP 5.2): 
http://bugs.php.net/fix.php?id=44585&r=trysnapshot52
Try a CVS snapshot (PHP 5.3): 
http://bugs.php.net/fix.php?id=44585&r=trysnapshot53
Try a CVS snapshot (PHP 6.0): 
http://bugs.php.net/fix.php?id=44585&r=trysnapshot60
Fixed in CVS:                 http://bugs.php.net/fix.php?id=44585&r=fixedcvs
Fixed in release:             
http://bugs.php.net/fix.php?id=44585&r=alreadyfixed
Need backtrace:               http://bugs.php.net/fix.php?id=44585&r=needtrace
Need Reproduce Script:        http://bugs.php.net/fix.php?id=44585&r=needscript
Try newer version:            http://bugs.php.net/fix.php?id=44585&r=oldversion
Not developer issue:          http://bugs.php.net/fix.php?id=44585&r=support
Expected behavior:            http://bugs.php.net/fix.php?id=44585&r=notwrong
Not enough info:              
http://bugs.php.net/fix.php?id=44585&r=notenoughinfo
Submitted twice:              
http://bugs.php.net/fix.php?id=44585&r=submittedtwice
register_globals:             http://bugs.php.net/fix.php?id=44585&r=globals
PHP 4 support discontinued:   http://bugs.php.net/fix.php?id=44585&r=php4
Daylight Savings:             http://bugs.php.net/fix.php?id=44585&r=dst
IIS Stability:                http://bugs.php.net/fix.php?id=44585&r=isapi
Install GNU Sed:              http://bugs.php.net/fix.php?id=44585&r=gnused
Floating point limitations:   http://bugs.php.net/fix.php?id=44585&r=float
No Zend Extensions:           http://bugs.php.net/fix.php?id=44585&r=nozend
MySQL Configuration Error:    http://bugs.php.net/fix.php?id=44585&r=mysqlcfg

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