显示code39条形码的PHP类[4]

            case "z":return ("213030202");
            case "-":return ("212020303");
            case ".":return ("312020302");
            case " ":return ("213020302");
            case "*":return ("212030302");
            case "$":return ("212121202");
            case "/":return ("212120212");
            case "+":return ("212021212");
            case "%":return ("202121212");
        }
        return ("212030302");
    }
    function display($code)//输出单个字符
    {
        $output="";
        for ($i=0;$i<9;$i++)
            $output.="<td height=".$this->height." bgcolor=".$this->patten[$code[$i]]->color." width=".$this->patten[$code[$i]]->width."></td>";
        return $output;
    }
    function decode($code)//全部输出
    {