tp5上传图像接口

public function upload()
    {
        $config = [
            'size' => 2097152,
            'ext'  => 'jpg,gif,png,bmp,txt,zip'
        ];
        $file = $this->request->file('file');
        $upload_path = str_replace('\\', '/', ROOT_PATH . 'public/uploads');
        $save_path   = '/uploads/';
        $info        = $file->validate($config)->move($upload_path);

        if ($info) {
            $result = [
                'error' => 0,
                'url'   => str_replace('\\', '/', $save_path . $info->getSaveName())
            ];
        } else {
            $result = [
                'error'   => 1,
                'message' => $file->getError()
            ];
        }

        return json($result);
    }
}