I am currently trying to insert the value of fields to a table. However, this error keeps coming up:

ksort() expects parameter to be array, integer given

Here is the code in my controller:

public function store(Request $request)
    {
        $input = $request->all();
        $businessfunction = BusinessFunction::create($input);

        $fields = Input::get('fields_');

        foreach($fields as $field) {
            DB::table('field_instances')->insert(
                ['value' => $fields, 'businessfunction_id' => $businessfunction->id]
            );
        }

I thought putting the information in a foreach loop would fix it, but I'm still getting the same error. Any assistance would be appreciated!