显示code39条形码的PHP类

2024-05-04 22:59:20

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<?
/***********************************************************************
                       written by caocao
                       [email protected]
                       http://nethermit.yeah.net
                       
                       显示code39条形码的类
                       使用方法：
                       $convert=new code39;
                       $str=$convert->decode($str);
***********************************************************************/

class pattenclass
{
    var $color;
    var $width;
    function pattenclass($color,$width)
    {
        $this->color=$color;
        $this->width=$width;
    }
}

class code39
{
    var $zoom;
    var $height;
    var $patten=array();
    function code39($zoom, $height)
    {
        $zoom=intval($zoom);
        $this->zoom=$zoom<1||$zoom>20?3:$zoom;
        $height=intval($height);
        $this->height=$height<1||$height>80?30:$height;
        $this->patten[]=new pattenclass("#ffffff",1*$this->zoom);
        $this->patten[]=new pattenclass("#ffffff",3*$this->zoom);
        $this->patten[]=new pattenclass("#000000",1*$this->zoom);
        $this->patten[]=new pattenclass("#000000",3*$this->zoom);
    }
    function makecode($code)//code39解码
    {
        switch ($code)
        {
            case "0":return ("202130302");
            case "1":return ("302120203");
            case "2":return ("203120203");
            case "3":return ("303120202");
            case "4":return ("202130203");
            case "5":return ("302130202");
            case "6":return ("203130202");
            case "7":return ("202120303");
            case "8":return ("302120302");
            case "9":return ("203120302");
            case "a":return ("302021203");
            case "b":return ("203021203");
            case "c":return ("303021202");
            case "d":return ("202031203");
            case "e":return ("302031202");
            case "f":return ("203031202");
            case "g":return ("202021303");
            case "h":return ("302021302");
            case "i":return ("203021300");
            case "j":return ("202031302");
            case "k":return ("302020213");
            case "l":return ("203020213");
            case "m":return ("303020212");
            case "n":return ("202030213");
            case "o":return ("302030212");
            case "p":return ("203030212");
            case "q":return ("202020313");
            case "r":return ("302020312");
            case "s":return ("203020312");
            case "t":return ("202030312");
            case "u":return ("312020203");
            case "v":return ("213020203");
            case "w":return ("313020202");
            case "x":return ("212030203");
            case "y":return ("312030202");
            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
    {
        $output="<table width=".($this->height/2*(strlen($code)+2)*$this->zoom)." height=".$this->height." border=0 cellspacing=0 cellpadding=0 align=/"center/"><tr>";
        $output.=$this->display($this->makecode("*"));
        $output.="<td height=".$this->height." bgcolor=".$this->patten[0]->color." width=".$this->patten[0]->width."></td>";
        $length=strlen($code);
        for ($i=0;$i<$length;$i++)
        {
            $output.=$this->display($this->makecode($code[$i]));
            $output.="<td height=".$this->height." bgcolor=".$this->patten[0]->color." width=".$this->patten[0]->width."></td>";
        }
        $output.=$this->display($this->makecode("*"));
        $output.="</tr></table>";
        return $output;
    }
}
?>