From:             clement dot hallet at af83 dot com
Operating system: Mac OS X 10.5.6
PHP version:      5.2.9
PHP Bug Type:     Variables related
Bug description:  unexpected isset return

Description:
------------
Hi,

A call to the 'isset' function with a variable set to NULL returns FALSE.

As seen on a previous report bug (http://bugs.php.net/bug.php?id=6076),
the return value should be TRUE.

Reproduce code:
---------------
$a = NULL;
var_dump(isset($a));

Expected result:
----------------
the return of isset($a) should be TRUE.

Actual result:
--------------
isset($a) returns FALSE

-- 
Edit bug report at http://bugs.php.net/?id=48364&edit=1
-- 
Try a CVS snapshot (PHP 5.2):        
http://bugs.php.net/fix.php?id=48364&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):        
http://bugs.php.net/fix.php?id=48364&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):        
http://bugs.php.net/fix.php?id=48364&r=trysnapshot60
Fixed in CVS:                        
http://bugs.php.net/fix.php?id=48364&r=fixedcvs
Fixed in CVS and need be documented: 
http://bugs.php.net/fix.php?id=48364&r=needdocs
Fixed in release:                    
http://bugs.php.net/fix.php?id=48364&r=alreadyfixed
Need backtrace:                      
http://bugs.php.net/fix.php?id=48364&r=needtrace
Need Reproduce Script:               
http://bugs.php.net/fix.php?id=48364&r=needscript
Try newer version:                   
http://bugs.php.net/fix.php?id=48364&r=oldversion
Not developer issue:                 
http://bugs.php.net/fix.php?id=48364&r=support
Expected behavior:                   
http://bugs.php.net/fix.php?id=48364&r=notwrong
Not enough info:                     
http://bugs.php.net/fix.php?id=48364&r=notenoughinfo
Submitted twice:                     
http://bugs.php.net/fix.php?id=48364&r=submittedtwice
register_globals:                    
http://bugs.php.net/fix.php?id=48364&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=48364&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=48364&r=dst
IIS Stability:                       
http://bugs.php.net/fix.php?id=48364&r=isapi
Install GNU Sed:                     
http://bugs.php.net/fix.php?id=48364&r=gnused
Floating point limitations:          
http://bugs.php.net/fix.php?id=48364&r=float
No Zend Extensions:                  
http://bugs.php.net/fix.php?id=48364&r=nozend
MySQL Configuration Error:           
http://bugs.php.net/fix.php?id=48364&r=mysqlcfg

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