php man page for ssh2_auth_none

SSH2_AUTH_NONE(3)							 1							 SSH2_AUTH_NONE(3)

ssh2_auth_none - Authenticate as ";none"

SYNOPSIS
       mixed ssh2_auth_none (resource  $session, string  $username)

DESCRIPTION
	Attempt "none" authentication which usually will (and should) fail. As part of the failure, this function will return an array of accepted
       authentication methods.

PARAMETERS
	      o $session
		- An SSH connection link identifier, obtained from a call to ssh2_connect(3).

	      o $username
		- Remote user name.

RETURN VALUES
	Returns TRUE if the server does accept "none" as an authentication method, or an array of accepted authentication methods on failure.

EXAMPLES
       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
";
	      }
	      ?>

PHP Documentation Group 													 SSH2_AUTH_NONE(3)