protected function containsSpecialChars($input)
    {
        $special_chars = str_split($this->lineTerminator, 1);
        $special_chars[] = $this->quotechar;
        $special_chars[] = $this->delimiter;
        foreach ($special_chars as $char) {
            if (strpos($input, $char) !== false) {
                return true;
            }
        }

        return false;
    }