FTP Upload How To Only Upload Files That Do Not Exist At Destination

[poddys]

I am having trouble with script timeouts when trying to upload a number of images from Localhost to the FTP server.  This is always going to be a potential problem, depending on connection speed and server load unfortunately.

 

If I have say 10 images to upload, but 6 of them already exist in the destination folder (I can safely assume they have not changed in this case), how can I only upload the 4 new images.

 

I could not see any FTP options in the PHP commands, but I know it can be done with FTP programs like Filezilla. 

 

Thanks.

[AyKay47]

http://www.php.net/manual/en/wrappers.ftp.php