php-doc-en/reference/ssh2/functions/ssh2-auth-none.xml

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  <refentry id="function.ssh2-auth-none">
   <refnamediv>
    <refname>ssh2_auth_none</refname>
    <refpurpose>
     Authenticate as "none"
    </refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
    <methodsynopsis>
     <type>array</type><methodname>ssh2_auth_none</methodname>
     <methodparam><type>resource</type><parameter>session</parameter></methodparam>
     <methodparam><type>string</type><parameter>username</parameter></methodparam>
    </methodsynopsis>

    <simpara>
     Attempt "none" authentication which usually will (and should) fail.
     As part of this failure, servers will return a list of accepted
     authentication methods.  If the server does accept "none" as an
     authentication method for <parameter>username</parameter>, this function
     will simply return &true;.
    </simpara>

    <example>
     <title>Using <function>ssh2_auth_none</function> to retreive
            a list of authentication methods.</title>
     <programlisting role="php">
<![CDATA[
<?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";
}
?>
]]>
     </programlisting>
    </example>

   </refsect1>
  </refentry>

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