System: Linux
Server: XAMPP
Goal:
ssh-connection to a server (later: doing some stuff on this server, not part of this question)
Test-Code:
It looks like you are getting output. (M4300-28G-PoE+) >
is the output you're getting and you're getting it for both of the commands you're trying to run.
M4300-28G-PoE+ is a NetGear switch. Switches are fairly notorious for not having full SSH implementations.
My guess: if you want to run commands you'll have to use phpseclib's interactive commands:
echo $ssh->read('username@username:~$');
$ssh->write("ls -la\n"); // note the "\n"
echo $ssh->read('username@username:~$');