PHP FTP: Client to access FTP servers in pure PHP code

This class can be used to access FTP servers without using any PHP FTP specific extension.

It can:

- Connect to an FTP server and authenticate with a given user name and password
- Determine the server system type and FTP server options
- Retrieve of change the path of current directory
- List the files in a server directory
- Retrieve server files and copy to local files
- Retrieve the size and modification time of a file
- Rename files
- Delete files
- Create directories in the server
- Upload local files to the server
- Request the execution of a server program