(PECL ssh2 >= 0.9.0)
ssh2_auth_none — Authenticate as "none"
Attempt "none" authentication which usually will (and should) fail. As part of the failure, this function will return an array of accepted authentication methods.
sessionAn SSH connection link identifier, obtained from a call to ssh2_connect().
usernameRemote user name.
Returns true if the server does accept "none" as an authentication
method, or an array of accepted authentication methods on failure.
Example #1 Retrieving a list of authentication methods
<?php
$connection = ssh2_connect('shell.example.com', 22);
$auth_methods = ssh2_auth_none($connection, 'user');
if (in_array('password', $auth_methods)) {
echo "Server supports password based authentication\n";
}
?>