Qiniu picture upload problem

When uploading pictures using Qiniu Cloud, the following error occurred
Fatal error: Uncaught exception 'Exception' with message 'file can not open' in /var/www/html/includes/src/Qiniu/Storage/UploadManager.php :91 Stack trace: #0 /var/www/html/includes/cls_image.php(150): QiniuStorageUploadManager->putFile('2kHh1HThkNyWvGL...', 'images/201609/g...', 'images/ 201609/s...') #1 /var/www/html/admin/goods.php(1132): cls_image->qiniuUpload('images/201609/s...', 'goods_img') #2 { main} thrown in /var/www/html/includes/src/Qiniu/Storage/UploadManager.php on line 91

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When uploading pictures using Qiniu Cloud, the following error occurred
Fatal error: Uncaught exception 'Exception' with message 'file can not open' in /var/www/html/includes/src/Qiniu/Storage/UploadManager.php :91 Stack trace: #0 /var/www/html/includes/cls_image.php(150): QiniuStorageUploadManager->putFile('2kHh1HThkNyWvGL...', 'images/201609/g...', 'images/ 201609/s...') #1 /var/www/html/admin/goods.php(1132): cls_image->qiniuUpload('images/201609/s...', 'goods_img') #2 { main} thrown in /var/www/html/includes/src/Qiniu/Storage/UploadManager.php on line 91

Please confirm whether the path of the uploaded file has a value. That is

$_FILES['input-file-name']['tmp_name']

Qiniu Cloud code positioning is as follows:

<code>public function putFile(
        $upToken,
        $key,
        $filePath,
        $params = null,
        $mime = 'application/octet-stream',
        $checkCrc = false
    ) {
        $file = fopen($filePath, 'rb'); //文件不存在，或者不可读
        if ($file === false) { //文件为空
            throw new \Exception("file can not open", 1); //抛出错误的地方
        }
        $params = self::trimParams($params);
        $stat = fstat($file);
        $size = $stat['size'];
        if ($size <= Config::BLOCK_SIZE) {
            $data = fread($file, $size);
            fclose($file);
            if ($data === false) {
                throw new \Exception("file can not read", 1);
            }
            return FormUploader::put(
                $upToken,
                $key,
                $data,
                $this->config,
                $params,
                $mime,
                $checkCrc
            );
        }
        $up = new ResumeUploader(
            $upToken,
            $key,
            $file,
            $size,
            $params,
            $mime,
            $this->config
        );
        $ret = $up->upload();
        fclose($file);
        return $ret;
    }</code>