set_include_path(get_include_path() . PATH_SEPARATOR . 'phpseclib');
include('Net/SSH2.php');

$server = "mysnmpserver";
$username = "user";
$command = "./test.py";
$pass = "pass";

$ssh = new Net_SSH2($server);
if(!$ssh->login($username, $pass)){
    exit('login failed!');
}

echo $ssh->exec($command);