Fix notice for : "Undefined offset: 1" 
Fix notice for : "Undefined offset: 1" 

Is there a reason HTTP_COOKIE is being used here instead of $_COOKIE?
if $_COOKIE works for this usecase it simplifies the logic and removes the undefined offset that list is throwing when trying to explode $rawcookie with no equals sign.

Either we can do something like this patch, or at least do a strpos before doing the explode to list.
PerimeterX/perimeterx-php-sdk