(PECL ssh2 >= 0.10)
ssh2_publickey_init — Initialize Publickey subsystem
$session
) : resourceRequest the Publickey subsystem from an already connected SSH2 server.
The publickey subsystem allows an already connected and authenticated
client to manage the list of authorized public keys stored on the
target server in an implementation agnostic manner.
If the remote server does not support the publickey subsystem,
the ssh2_publickey_init() function will return FALSE.
session
Returns an SSH2 Publickey Subsystem resource for use
with all other ssh2_publickey_*() methods ������ʧ��ʱ���� FALSE.
Note: ��Կ��ϵͳ���ڹ����������������֤�Ŀͻ��˵Ĺ�Կ��Ҫ�ù�Կ��֤��������֤Զ��ϵͳ��Ӧʹ�� ssh2_auth_pubkey_file() ������