Linux – description for command : chmod 777

Using 777 on an server with an ftp is not safe, so unless it's a very isolated network I'd suggest using 700 and changing the user (chown) or 770 and changing the group (chgrp) to manage the permisions if you are developing with some other users.

So if the ftp user you are using is for example myftpuser

sudo chown -R myftpuser /path/to/file
sudo chmod -R 700 /path/to/file

Should work.

The wikipedia article on file system permissions may be relevant too

It may suggest that, but it isn't the case.

The first digit is "owner" permissions, the second is "group" permissions - and the owner and group are viewable with ls -l, and the third is "others", which literally means those that aren't either the owner or in the group.

So 007 means that neither the owner or group members can read, write, or execute the file, while everyone else can do all three.