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hyperf框架生成二维码海报图片时，如何同步阻塞执行代码？

### 问题描述
PHP Notice:  getimagesize(): Read error!
PHP Warning:  imagecopy() expects parameter 2 to be resource, boolean given
这些错误的原因是没有生成二维码图片之前，就异步执行了海报绘制图片，所以当获取图片信息时就会出现图片信息并不存在的问题，请问该如何同步阻塞执行代码呢？

### Swoole版本，PHP版本，以及操作系统版本信息
swoole 4.5
php 7.2

### 相关代码
/**
     * 获取用户邀请码
     * @param $uid
     * @throws \Exception
     */
    public function invite($uid)
    {
        //access——token
        $access_token = $this->WechatAppletService->access_token;
        $scene = ['scene'=>'uid:'.$uid];
        $json_data = json_encode($scene);
        //获取微信返回的带参数二维码
        $images = $this->WechatAppletService->_getQRCode($access_token, $json_data);
        //先保存到本地
        $file_path = '/usr/local/nginx/html/tp_car/hyperf-skeleton/imgruntime/invite_runtime_'.$uid.'.png';
        $f = fopen($file_path,'w');
        fwrite($f,$images);
        fclose($f);
        //二维码海报保存路径
        $save_path = '/usr/local/nginx/html/tp_car/hyperf-skeleton/imgruntime/tp_car_invite_'.$uid.'.jpg';
        $db = ApplicationContext::getContainer()->get(Db::class);
        //查询用户头像地址
        $avatar = $db->table('users')->where('id','=',$uid)->value('avatar');
        $avatar = str_replace('https','http',$avatar);
        //绘制图片
        //海报模板
        $img1 = imagecreatefromjpeg('/usr/local/nginx/html/tp_car/hyperf-skeleton/share.jpg');
        //绘制二维码
        //imageResize（）等比例处理图片
        $newQrcode = $this->imageResize($file_path, 418, 418);
        //绘制到海报上
        imagecopy($img1, $newQrcode, 169, 188, 0, 0, 418, 418);
        //绘制用户头像
        //imageResize（）等比例处理图片
        $newUserImg = $this->imageResize($avatar,88);
        //绘制到海报上
        imagecopy($img1, $newUserImg, 344, 355, 0, 0, 72,88);
        //生成新图片
        imagejpeg($img1,$save_path);
        //七牛
        $accessKey = config('qiniu.accessKey');
        $secretKey = config('qiniu.secretKey');
        $auth = new Auth($accessKey, $secretKey);
        $bucket = config('qiniu.bucket');
        // 生成上传Token
        //覆盖上传
        $keyToOverwrite = 'tp_carinvite'.$uid.'.jpg';
        $token = $auth->uploadToken($bucket, $keyToOverwrite);
        // 构建 UploadManager 对象
        $uploadMgr = new UploadManager();
        //上传七牛
        $uploadMgr->putFile($token,$keyToOverwrite,$save_path);
    }

private function imageResize($path,$maxWidth,$maxHeight=0,$balance=1)
    {
        //1.获取被缩放图片的信息
        $info = getimagesize($path);
        $width = $info[0];
        $height = $info[1];
        //2.根据传入的图片类型来创建对应的画布资源
        switch($info[2]){
            case 1://gif
                $srcim = imagecreatefromgif($path);
                break;
            case 2://jpeg
                $srcim = imagecreatefromjpeg($path);
                break;
            case 3://png
                $srcim = imagecreatefrompng($path);
                break;
            default:
                return false;//返回假
                break;
        }
        //3.计算缩放后的尺寸
        if($balance) {
            if(!$maxHeight){
                //按宽等比例
                $w = $maxWidth;
                $h = ($maxWidth/$width)*$height;
            }else{
                //按高等比例
                $w = ($maxHeight/$height)*$width;
                $h = $maxHeight;
            }
        } else {
            //非等比例
            $w = $maxWidth;
            $h = $maxHeight;
        }
        //4.创建目标画布
        $dstim = imagecreatetruecolor($w,$h);
        //5.开始绘画
        imagecopyresampled($dstim,$srcim,0,0,0,0,$w,$h,$width,$height);
        //6.销毁资源
        imagedestroy($srcim);
        //7、返回结果
        return $dstim;
    }

发布于5年前 · 22 次浏览 · 来自提问