使用composer安装和使用endroid/QrCode来生成二维码

安装composer

composer require endroid/qr-code

2.实现代码

<?php

namespace app\controller;

use BaconQrCode\Renderer\GDLibRenderer;
use BaconQrCode\Writer;
class Test extends BaseController
{
 
 
// 如果需要直接输出到浏览器
public function QrCode() {
 $renderer = new GDLibRenderer(400);
 $writer = new Writer($renderer);
 
 // 直接输出到浏览器
 header('Content-Type: image/png');
 echo $writer->writeString('Hello World!');
 exit;
}
  
}