PHP Telnet

interactive

Well I've been searching around quiet a bit on here and google and have found basicly nothing. Here's what I would like to do. I have a Masterswitch setup that I need to connect to with telnet. Run a few commands then close the conneciton. I've looked at using fsockopen and have come up with this:

<?php
$fp = fsockopen ("server", 23, $errno, $errstr, 30);
if (!$fp) {
    echo "$errstr ($errno)<br>\n";
} else {
echo fgets($fp, 26);
fputs($fp, "username\r\n");
fputs($fp, "password\r\n");
echo fgets($fp, 26);
}
fclose($fp);
?>

Am I going about this at the wrong angle? Thanks

Mordecai

If you check around on some script sites, you're bound to find an telnet client, like Solace (for MUDs) or HotScripts.com's listing of telnet utilities.

Damien_Buttler

I have also been trying to telnet to a router with limted success. I believe that your code would work fine as it looks like mine but I have found the frustrating bit, is how to know when you have received the last byte. I noticed in your code after connection you receive 26 bytes. I assume you got this value from trial and error as I did. I would appreciate anyone who could show how we could find the stop byte. So we could use code similar to that below:

while(!feof($fp))
{
$line[] = fgets($fp, 1024);
}

Thanks,
Damien.

matt_4013

You can get the amount of unread bytes from a socket connection by using the socket_get_status() function. eg:

$status = socket_get_status($fp);

$output = fread($fp, $status['unread_bytes']);

matt_4013

ahhh, wait, I'm not sure if that will work. Doesn't telnet send 1 character at a time?