1、进入composer官方网站，搜索phpqrcode安装包

 composer命令安装

composer require aferrandini/phpqrcode

生成二维码图片的公共方法：

// 公用二维码生成
static function setQrcode($url){
    //二维码图片保存路径
    $path = 'advert/qrcode/'.date("Ymd");
    $pathname = storage_path('app/public/').$path;
    if(!is_dir($pathname)) { //若目录不存在则创建之
        mkdir($pathname,0777,true);
    }
    $qrcode = new QRcode();
    //二维码图片保存路径(若不生成文件则设置为false)
    $suijishu = date("YmdHis").rand(100,999);
    $filename = $pathname . "/qrcode_" . $suijishu . ".png";//生成路径
    $destName = 'storage/'.$path."/qrcode_" . $suijishu . ".png";//返回路径
    //二维码容错率，默认L
    $level = "L";
    //二维码图片每个黑点的像素，默认4
    $size = '10';
    //二维码边框的间距，默认2
    $padding = 2;
    //保存二维码图片并显示出来，$filename必须传递文件路径
    $saveandprint = true;
    //生成二维码图片
    $qrcode->png($url,$filename,$level,$size,$padding,$saveandprint);
    //二维logo
    //$logo = "./public/wxpay/images/logo.png";
    //$QR = imagecreatefromstring(file_get_contents($filename));
    //$logo = imagecreatefromstring(file_get_contents($logo));
    //$QR_width = imagesx($QR);
    //$QR_height = imagesy($QR);
    //$logo_width = imagesx($logo);
    //$logo_height = imagesy($logo);
    //$logo_qr_width = $QR_width / 5;
    //$scale = $logo_width / $logo_qr_width;
    //$logo_qr_height = $logo_height / $scale;
    //$from_width = ($QR_width - $logo_qr_width) / 2;
    //imagecopyresampled($QR, $logo, $from_width, $from_width, 0, 0, $logo_qr_width, $logo_qr_height, $logo_width, $logo_height);
    //imagecopyresampled($QR, $logo, $from_width, $from_width, 0, 0, $logo_qr_width, $logo_qr_height, $logo_width, $logo_height);
    //imagepng($QR,$filename);
    return $destName;
}

控制器调用：

use PHPQRCode\QRcode;

$result['code_url'] = $this->setQrcode($result['code_url']);//生成二维码