显示code39条形码的PHP类[5]

        $output="<table width=".($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>";
        }