csapi/application/expand/controller/Barcode.php

<?php
namespace app\expand\controller;
use app\common\service\HelperService;
use think\Log;
use think\Validate;

/**
 * 条形维码
 * Class Alipay
 * @package app\expand\controller
 */
class Barcode extends BaseAuth
{
    private $_Account = null;

    public function __construct(){

        parent::__construct();

        $this->_Account = $this->getKey($this->_apiCode);
        //验证是否具有访问这个接口的权限
        if(!isset($this->_Account['isBarcode'])){
            HelperService::returnJson(['code'=>400,'msg'=>'isBarcode interface unauthorized access','data'=>[]]);
        }
    }


    /**
     * 条形码
     * @throws \Exception
     */
     public function Bar(){
         
         header( "Content-Type:text/html;charset=UTF-8");
        
        $params = $this->_sysParams;
         
        $rule = [
            'content|内容'=>'require',
            'is_down|是否下载'=>'require',
        ];
        
        $validate = new Validate($rule);
        if(!$validate->check($params)){
            HelperService::returnJson(['code'=>400,'msg'=>$validate->getError(),'data'=>[]]);
        }
         
        // Including all required classes
        require_once(WEB_ROOT."/../vendor/barcodegen/class/BCGFontFile.php");
        require_once(WEB_ROOT."/../vendor/barcodegen/class/BCGDrawing.php");
        require_once(WEB_ROOT."/../vendor/barcodegen/class/BCGcode128.barcode.php");

        // Loading Font
        $font = new \BCGFontFile('./font/Arial.ttf', 8);
        
        // Don't forget to sanitize user inputs
        $content = $params['content'];

        // 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 \BCGcode128();
            $code->setScale(1); // 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)
            $code->parse($content); // content
        } catch(\Exception $ex) {
            throw new \Exception($ex->getMessage());
        }

        /* 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();
        }

        if($params['is_down']){
            
            $time = time().rand(1000,9999);
            $png = "./qrcode/{$time}.png";
            $drawing->setFilename($png);

            $drawing->finish(\BCGDrawing::IMG_FORMAT_PNG);
            
            $fontSize = 18;

            if(isset($params['note']) && !empty($params['note'])){

                $noteArr = explode(',',$params['note']);
                //以每行行高22px计算+20的空间
                $total_lineHeight = count($noteArr)*30-0;

                $imageSource = imagecreatefrompng($png);
                $width = imagesx($imageSource);
                $height = imagesy($imageSource);

                //创建画板
                $Palette = @imagecreate($width,$height+$total_lineHeight);
                //填充白色背景
                imagecolorallocate($Palette,255,255,255);
                imagecopyresized($Palette,$imageSource,0,0,0,0,$width,$height,$width,$height);

                //指定字体的颜色
                $color = imagecolorallocate($Palette,0,0,0);

                $i = 0;
                foreach($noteArr as $noteLine){
                    $fontBox = imagettfbbox($fontSize, 0, './font/NotoSansHans-DemiLight.ttf', $noteLine);//水平居中实质
                    imagettftext($Palette,$fontSize,0,ceil(($width - $fontBox[2]) / 2),$height+30*($i++)+15,$color,'./font/NotoSansHans-DemiLight.ttf',$noteLine);
                }
                imagepng($Palette, $png);
            }

            HelperService::downloadFile($png);
        }

        // 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);
    }
    
}