//條形碼
    public function barcodegen()
    {   

//vendor 資料夾下面
        vendor('barcodegen.class.BCGFontFile');
        vendor('barcodegen.class.BCGColor');
        vendor('barcodegen.class.BCGDrawing');
        vendor('barcodegen.class.BCGcode39');
        // Loading Font
        $font = new \BCGFontFile("./ThinkPHP/Library/Vendor/barcodegen/font/Arial.ttf", 18);
        // Don't forget to sanitize user inputs
        $text = isset($_GET['text']) ? $_GET['text'] : '88888888';
        // The arguments are R, G, B for color.
        $color_black = new \BCGColor(0, 0, 0);
        $color_white = new \BCGColor(255, 255, 255);
        $drawException = null;
        try {
            $code = new \BCGcode39();
            $code->setScale(2); // Resolution
            $code->setThickness(30); // Thickness
            $code->setForegroundColor($color_black); // Color of bars
            $code->setBackgroundColor($color_white); // Color of spaces
            $code->setFont($font); // Font (or 0)
            $code->parse($text); // Text
        } catch(Exception $exception) {
            $drawException = $exception;
        }
        /* Here is the list of the arguments
        1 - Filename (empty : display on screen)
        2 - Background color */
        $drawing = new \BCGDrawing('', $color_white);
        if($drawException) {
            $drawing->drawException($drawException);
        } else {
            $drawing->setBarcode($code);
            $drawing->draw();
        }

        // Header that says it is an image (remove it if you save the barcode to a file)
        header('Content-Type: image/png');
        header('Content-Disposition: inline; filename="barcode.png"');

        // Draw (or save) the image into PNG format.
        $drawing->finish(\BCGDrawing::IMG_FORMAT_PNG);

    }
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 <td><img src="{:U('Tongcheng/Takeout/barcodegen/text/'."ST".$vo['store_id'].'ID'.$vo['id'])}"/></td>