Attempt "none" authentication which usually will (and should) fail.
As part of the failure, this function will return an array of accepted
authentication methods.
Список параметров
session
An SSH connection link identifier, obtained from a call to
ssh2_connect().
username
Remote user name.
Возвращаемые значения
Returns TRUE if the server does accept "none" as an authentication
method, or an array of accepted authentication methods on failure.
Примеры
Пример #1 Retrieving a list of authentication methods