From:             
Operating system: any
PHP version:      Irrelevant
Package:          PHP options/info functions
Bug Type:         Feature/Change Request
Bug description:new operator

Description:
------------
Hi,
Let's implement a new operator - '??' (used in c#).

The ?? operator is called the null-coalescing operator and is used to
define a default value. It returns the left-hand operand if the operand is
not null; otherwise it returns the right operand.


Test script:
---------------
example:
$var1 = null;
$var2 = null;
$var3 = $var1 ?? $var2; //$var3==null
$var4 = $var1 ?? 'default1'; //$var4=='default1'
$var5 = $var1 ?? $var2 ?? 'default2'; //$var5=='default2'
$var6 = $var2 ?? $var3 ?? $var4 ?? 'default3'; //$var6=='default1' since
the first non-null value is $var4=='default1'


-- 
Edit bug report at https://bugs.php.net/bug.php?id=62043&edit=1
-- 
Try a snapshot (PHP 5.4):            
https://bugs.php.net/fix.php?id=62043&r=trysnapshot54
Try a snapshot (PHP 5.3):            
https://bugs.php.net/fix.php?id=62043&r=trysnapshot53
Try a snapshot (trunk):              
https://bugs.php.net/fix.php?id=62043&r=trysnapshottrunk
Fixed in SVN:                        
https://bugs.php.net/fix.php?id=62043&r=fixed
Fixed in SVN and need be documented: 
https://bugs.php.net/fix.php?id=62043&r=needdocs
Fixed in release:                    
https://bugs.php.net/fix.php?id=62043&r=alreadyfixed
Need backtrace:                      
https://bugs.php.net/fix.php?id=62043&r=needtrace
Need Reproduce Script:               
https://bugs.php.net/fix.php?id=62043&r=needscript
Try newer version:                   
https://bugs.php.net/fix.php?id=62043&r=oldversion
Not developer issue:                 
https://bugs.php.net/fix.php?id=62043&r=support
Expected behavior:                   
https://bugs.php.net/fix.php?id=62043&r=notwrong
Not enough info:                     
https://bugs.php.net/fix.php?id=62043&r=notenoughinfo
Submitted twice:                     
https://bugs.php.net/fix.php?id=62043&r=submittedtwice
register_globals:                    
https://bugs.php.net/fix.php?id=62043&r=globals
PHP 4 support discontinued:          
https://bugs.php.net/fix.php?id=62043&r=php4
Daylight Savings:                    https://bugs.php.net/fix.php?id=62043&r=dst
IIS Stability:                       
https://bugs.php.net/fix.php?id=62043&r=isapi
Install GNU Sed:                     
https://bugs.php.net/fix.php?id=62043&r=gnused
Floating point limitations:          
https://bugs.php.net/fix.php?id=62043&r=float
No Zend Extensions:                  
https://bugs.php.net/fix.php?id=62043&r=nozend
MySQL Configuration Error:           
https://bugs.php.net/fix.php?id=62043&r=mysqlcfg

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