Compress whole folder and its content on a remote ftp server in php

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PHP

FTP

ZIP

Hi guys;
I've been trying to come up with a way to build an automated PHP transfer system between 2 servers.

Server A : only ftp access; server B : ftp access and can run php scripts.

I want to copy all file in server A to a folder in server B;

Here is what I am trying to do :

1: function compress_each_ftp_folder_or_file_in_ftp_Backups_folder();

2: function delete each_ftp_folder_in_ftp_Backups_folder_after_successful_zipping();

3: function download_each_archive_in_ftp_Backups_folder();

4: function delete_each_archive_after_successful_download();

I have written some scripts for step 2, 3 and 4 but nothing found on web that help me with step 1;
I found lot of codes to compress folders or files on local server, but I don't found any script that compress a whole folder on a remote ftp server.

I think it was the time to ask for a help. Thanks for helping me.