Reader::readInteger PHP Method

    public function readInteger()
    {
        $tag = $this->stream->getc();
        switch ($tag) {
            case '0':
                return 0;
            case '1':
                return 1;
            case '2':
                return 2;
            case '3':
                return 3;
            case '4':
                return 4;
            case '5':
                return 5;
            case '6':
                return 6;
            case '7':
                return 7;
            case '8':
                return 8;
            case '9':
                return 9;
            case Tags::TagInteger:
                return $this->readIntegerWithoutTag();
            default:
                throw $this->unexpectedTag($tag);
        }
    }