Should I Disconnect After Using A Ssh Through Php?

If i use chmod to a folder inside a sftp server just like this:

    public function connection()
    {  
  //connection  
        $ssh = new SSH2('10.10.10.10');
        if (!$ssh->login('login', 'passwrd')) 
        {
          exit('Login Failed');
        }
  //chmod command
        echo $ssh->exec('sudo chmod -R 775 test_folder');
     }

after using the chmod command, should i disconnect doing something like this:

$ssh->disconnect();

or it's ok to keep that way?

Yes, if you're done with your SSH commands, you should disconnect as a good practice