Description:
------------
---
From manual page: https://php.net/function.array-search
---
I used array_search() to look at the beginning of the array and find the location of the first null.（In order to fill the array's nulls per request）
But array_search() tests 0 as null.

Try the example below.

Test script:
---------------
$array = [
'a' => 1,
'b' => 0,
'c' => null,
'd' => null
];

echo array_search(null, $array);//expect c


> b

Expected result:
----------------
I would have liked to have gotten a C back if I could.
You can also use foreach as an alternative, so please let me know if this is a spec or a bug.