Description
resource 
ssh2_tunnel ( resource session, string host, int port )
     Open a socket stream to an arbitrary host/port by way of the
     currently connected SSH server.
    
Example 1. Opening a tunnel to an arbitrary host 
<?php $connection = ssh2_connect('shell.example.com', 22); ssh2_auth_pubkey_file($connection, 'username', 'id_dsa.pub', 'id_dsa');
  $tunnel = ssh2_tunnel($connection, '10.0.0.101', 12345); ?>
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     See Also:
     ssh2_connect(), and
     fsockopen()