如何将图像文件夹与数据同步到远程服务器

I am syncing the data from local system to remote server through PHP, data syncing correctly to remote server, but I have some folder(folder contains images) too sync along with data, how to sync folder from local system to REMOTE SERVER with PHP, I am trying with

$connection = ssh2_connect('http://www.***.com:/tmp', 22);
ssh2_auth_password($connection, 'root', '');
ssh2_scp_send($connection, '/upload', 'www.***.com:/tmp', 0777);

but its not working...

anyone can help?