csv to array

private function csvToArray($filename='', $delimiter=',')
    {
        $rows = array_map('str_getcsv', file($filename));
        $header = array_shift($rows);

        $csv = array();
        foreach ($rows as $row) {
            if(count($row) != count($header)) {
                dd($row);
            }
            $csv[] = array_combine($header, $row);
        }
        return $csv;
    }