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

I just noticed that any scalar type could be used as an array.
This could be source of a long list of undetectable bugs.
Should this be considered as a bug ?

Except for strings, that should be indexable. But then, only with numeric indexes, not strings (that are anyway evaluated to 0).

Reproduce code:
---------------
$value = false;
var_dump($value['hello']);

$value = 4;
var_dump($value['hello']);

$value = 74.6;
var_dump($value['hello']);

$value = 'hello';
var_dump($value['hello']);

Expected result:
----------------
Some Fatal error, something brutal that will halt the script.

Actual result:
--------------
NULL NULL NULL string(1) "h"