This class can be used to access remoter server resources using secure shell (ssh) protocol. It uses the PHP ssh2 extension to establish an SSH connection to a given remote host. The class can authenticate on behalf of a given user, execute a shell command and retrieve the command output, and send or receive files to the remote host like with the scp command. access to resources (shell, remote exec, file transfer) on a remote machine using a secure cryptographic transport with PHP