Edit report at https://bugs.php.net/bug.php?id=60906&edit=1

 ID:                 60906
 Updated by:         ahar...@php.net
 Reported by:        luke at cywh dot com
 Summary:            new function "udef", similar to isset or empty
-Status:             Open
+Status:             Wont fix
 Type:               Feature/Change Request
 Package:            *General Issues
 PHP Version:        5.4.0RC6
 Block user comment: N
 Private report:     N

 New Comment:

This has previously been proposed and declined (due to the existence of 
userspace 
equivalents) as ifsetor/coalesce. An RFC was written after the fact to 
summarise 
the discussion, and can be found at https://wiki.php.net/rfc/ifsetor


Previous Comments:
------------------------------------------------------------------------
[2012-01-27 17:21:34] luke at cywh dot com

Description:
------------
It's usually a good practice to develop with the highest error level to 
eliminate all warnings and notices.

There are some cases where you know a variable or array index won't be defined. 
So in order to eliminate the notice you write something like this:

$value = isset($input['name']) ? $input['name'] : "";

I end up writing this a lot, especially with user input and templates. In many 
cases it's OK and intended the variable is undefined and the value is NULL.

Another "solution" is to write this:

$value = &$input['name'];

But this only works when "&" is preceded by "=".

You could also write this:

$value = @$input['name'];

But this only prevents the error from displaying. It is sill reported by 
error_get_last.

We need a simple function like isset that returns the value or NULL. It could 
be 
used like this:

$value = udef($input['name']);

This is possible now with a user defined function (code below). But it would be 
nice to have a construct like isset/empty that did this.

(Not shown in example, but perhaps it could take multiple arguments like isset 
and return the first non-NULL value it finds)

Test script:
---------------
function udef(&$var)
{
    return $var;
}

$one = array();

print udef($one['one']);
print_r($one);

Expected result:
----------------
Array ( [one] => )

Actual result:
--------------
Array ( [one] => )


------------------------------------------------------------------------



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