csapi/application/expand/controller/Qrcode.php

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

/**
 * 二维码
 * Class Alipay
 * @package app\expand\controller
 */
class Qrcode 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['isQrcode'])){
            HelperService::returnJson(['code'=>400,'msg'=>'isQrcode interface unauthorized access','data'=>[]]);
        }
    }


    /**
     * 产生二维码的案例
     */
    public function QR(){
        
        header( "Content-Type:text/html;charset=UTF-8");
        
        $params = $this->_sysParams;

        $rule = [
            'content|内容'=>'require',
            'level|大小的level【LMQH】'=>'require',
            'size|大小'=>'require|number',
            'is_down|是否下载'=>'require|number',
        ];
        
        $validate = new Validate($rule);
        if(!$validate->check($params)){
            HelperService::returnJson(['code'=>400,'msg'=>$validate->getError(),'data'=>[]]);
        }
        
        $content = $params['content'];
        $level   = $params['level'];
        $size    = $params['size'];
        vendor("phpqrcode.phpqrcode");

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

        \QRcode::png($content,$png,$level,min(max($size,4),10),2);

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

            $fontSize = 18;
            
            $noteArr = explode(',',$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,14,0,ceil(($width - $fontBox[2]) / 2),$height+30*($i++)+15,$color,'./font/NotoSansHans-DemiLight.ttf',$noteLine);
            }
            imagepng($Palette, $png);
        }

        $note = isset($params['note'])?$params['note']:'';
        Log::record("old input:\n".  json_encode(HelperService::$_sysParams)."\n note: \n".$note);

        if($params['is_down']) {
            HelperService::downloadFile($png);
        }
        
        exit;
    }

    
    
}