Undefined Constants behavior in PHP6

and what's wrong with the following syntax?

if(defined('DEBUG')) print_r($_SESSION);

I don't think there's a need to change anything here…

I was wondering if someone already think about modifying the actual behavior
of undefined constants in php6.
I'm desperate with some

if(DEBUG) print_r($_SESSION);

• and lot others case -

Is there a possibility undefined constants ( strings ) return "null" :x ?
I do not think it's a mistake, since echo "{$array[foo]}" is not good and
"{$array['foo']}" is

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Alexey Zakhlestin
http://blog.milkfarmsoft.com/

It's not always a structural issue :/
I'm sure non defined string interpretation is a bad thing

I'm not a php core writter, but it have to be, even a little, more
complicated to use undefined constants as there "string" value, than as
"null"

Maybe i'm the only one thinking that way.
I'll try to handle this by myself with parsekit & runkit ...