如何将文件从codeigniter应用程序上传到dropbox

我有一个控制器可以将图片上传到我的网络服务器。我想在该过程中将该图片上传到Dropbox。我将如何做呢？

I have a controller to upload image to my web server. I want to upload that image to dropbox as well during the process. how would I do it?

这是我简单的upload.php控制器：

This is my simple upload.php controller:

function index() {
    // get the binary data
    $file = file_get_contents("php://input");

    // prepare new name for upload image
    $name =rand().time().'jpg';

    $path = site_url('photo');

    // save to server directory
    file_put_contents($path.$name, $file);

    // save the name and id of the post to post photo table
    $input =  array(    'name' => $name,
                        'post_id'=> $id
                    );

    $this->db->insert('post_photo', $input);

}