php script to execute commands on Cisco router - php

Question

I need to write a script to connect to a Cisco router and execute commands. The linux server and the Cisco router use ssh keys so no username/password are required. I have worked out how to make the connection, but I don't know how to issue the commands and read the responses.
Note: It has to be in php to integrate with some other stuff we have going on.
Here is what I have so far :-
<?php
$connection = ssh2_connect("n.n.n.n", 22, array("hostkey"=>"ssh-rsa"));
if(!$connection)
{
die("Could not connect to the Router \n\r");
exit();
}
if (ssh2_auth_none ($connection, "username"))
{
echo("Public Key Authentication Successful\n\r");
}
else
{
die("Public Key Authentication Failed");
exit();
}
// New commands based on help received
try
{
$command = "dir";
$stream = ssh2_exec($connection, $command);
// added to test if the ssh2_exec command returns false - which it does, issue is with the command ???
if(!$stream)
{
echo("Command returned False\n\r");
exit();
}
$errorStream = ssh2_fetch_stream($stream, SSH2_STREAM_STDERR);
stream_set_blocking($errorStream, true);
stream_set_blocking($stream, true);
$errorStreamContent = stream_get_contents($errorStream);
$streamContent = stream_get_contents($stream);
echo("ErrorStream : " . $errorStreamContent . "\n" . "Stream : " .
$streamContent . "\n\r");
}
catch(exception $e)
{
echo("Error : " . $e);
exit();
}
?>
Output is now as follows :-
Public Key Authentication Successful
Command returned False
Can anyone give me the correct way to issue commands and read any result ? Thanks.

Answer 1

I managed to fix this by using ssh2_auth_pubkey_file to pass the ssh keys to the router and authenticate. After that it works fine.