getallheaders() might return false

[adriansuter]

Hi there

According to the php documentation, the function getallheaders() might return false. In fact, on my hosting, the function even returns null.

Probably you should check, if the variable $headers is an array and skip if not.

Slim/Slim/Http/Headers.php

Line 82 in eaee12e

$headers = array_change_key_case($headers, CASE_LOWER);

On my hosting I get the following warning:

array_change_key_case() expects parameter 1 to be array, null given

Thanks
Adrian