I want to write a php script to connect to a hp-unix system using telnet and run some commands, get the output and then display the output. I'm using the following PHP class.

<?php

class PHPTelnet {
	var $show_connect_error=1;

var $use_usleep=0;	// change to 1 for faster execution
	// don't change to 1 on Windows servers unless you have PHP 5
var $sleeptime=125000;
var $loginsleeptime=1000000;

var $fp=NULL;
var $loginprompt;

var $conn1;
var $conn2;

/*
0 = success
1 = couldn't open network connection
2 = unknown host
3 = login failed
4 = PHP version too low
*/
function Connect($server,$user,$pass) {
	$rv=0;
	$vers=explode('.',PHP_VERSION);
	$needvers=array(4,3,0);
	$j=count($vers);
	$k=count($needvers);
	if ($k<$j) $j=$k;
	for ($i=0;$i<$j;$i++) {
		if (($vers[$i]+0)>$needvers[$i]) break;
		if (($vers[$i]+0)<$needvers[$i]) {
			$this->ConnectError(4);
			return 4;
		}
	}

	$this->Disconnect();

	if (strlen($server)) {
		if (preg_match('/[^0-9.]/',$server)) {
			$ip=gethostbyname($server);
			if ($ip==$server) {
				$ip='';
				$rv=2;
			}
		} else $ip=$server;
	} else $ip='127.0.0.1';

	if (strlen($ip)) {
		if ($this->fp=fsockopen($ip,23)) {
			fputs($this->fp,$this->conn1);
			$this->Sleep();

			fputs($this->fp,$this->conn2);
			$this->Sleep();
			$this->GetResponse($r);
			$r=explode("\n",$r);
			$this->loginprompt=$r[count($r)-1];

			fputs($this->fp,"$user\r");
			$this->Sleep();

			fputs($this->fp,"$pass\r");
			if ($this->use_usleep) usleep($this->loginsleeptime);
			else sleep(1);
			$this->GetResponse($r);
			$r=explode("\n",$r);
			if (($r[count($r)-1]=='')||($this->loginprompt==$r[count($r)-1])) {
				$rv=3;
				$this->Disconnect();
			}
		} else $rv=1;
	}

	if ($rv) $this->ConnectError($rv);
	return $rv;
}

function Disconnect($exit=1) {
	if ($this->fp) {
		if ($exit) $this->DoCommand('exit',$junk);
		fclose($this->fp);
		$this->fp=NULL;
	}
}

function DoCommand($c,&$r) {
	if ($this->fp) {
		fputs($this->fp,"$c\r");
		$this->Sleep();
		$this->GetResponse($r);
		$r=preg_replace("/^.*?\n(.*)\n[^\n]*$/","$1",$r);
	}
	return $this->fp?1:0;
}

function GetResponse(&$r) {
	$r='';
	do { 
		$r.=fread($this->fp,1000);
		$s=socket_get_status($this->fp);
	} while ($s['unread_bytes']);
}

function Sleep() {
	if ($this->use_usleep) usleep($this->sleeptime);
	else sleep(1);
}

function PHPTelnet() {
	$this->conn1=chr(0xFF).chr(0xFB).chr(0x1F).chr(0xFF).chr(0xFB).
		chr(0x20).chr(0xFF).chr(0xFB).chr(0x18).chr(0xFF).chr(0xFB).
		chr(0x27).chr(0xFF).chr(0xFD).chr(0x01).chr(0xFF).chr(0xFB).
		chr(0x03).chr(0xFF).chr(0xFD).chr(0x03).chr(0xFF).chr(0xFC).
		chr(0x23).chr(0xFF).chr(0xFC).chr(0x24).chr(0xFF).chr(0xFA).
		chr(0x1F).chr(0x00).chr(0x50).chr(0x00).chr(0x18).chr(0xFF).
		chr(0xF0).chr(0xFF).chr(0xFA).chr(0x20).chr(0x00).chr(0x33).
		chr(0x38).chr(0x34).chr(0x30).chr(0x30).chr(0x2C).chr(0x33).
		chr(0x38).chr(0x34).chr(0x30).chr(0x30).chr(0xFF).chr(0xF0).
		chr(0xFF).chr(0xFA).chr(0x27).chr(0x00).chr(0xFF).chr(0xF0).
		chr(0xFF).chr(0xFA).chr(0x18).chr(0x00).chr(0x58).chr(0x54).
		chr(0x45).chr(0x52).chr(0x4D).chr(0xFF).chr(0xF0);
	$this->conn2=chr(0xFF).chr(0xFC).chr(0x01).chr(0xFF).chr(0xFC).
		chr(0x22).chr(0xFF).chr(0xFE).chr(0x05).chr(0xFF).chr(0xFC).chr(0x21);
}

function ConnectError($num) {
	if ($this->show_connect_error) switch ($num) {
	case 1: echo '<br />[PHP Telnet] <a href="http://www.geckotribe.com/php-telnet/errors/fsockopen.php">Connect failed: Unable to open network connection</a><br />'; break;
	case 2: echo '<br />[PHP Telnet] <a href="http://www.geckotribe.com/php-telnet/errors/unknown-host.php">Connect failed: Unknown host</a><br />'; break;
	case 3: echo '<br />[PHP Telnet] <a href="http://www.geckotribe.com/php-telnet/errors/login.php">Connect failed: Login failed</a><br />'; break;
	case 4: echo '<br />[PHP Telnet] <a href="http://www.geckotribe.com/php-telnet/errors/php-version.php">Connect failed: Your server\'s PHP version is too low for PHP Telnet</a><br />'; break;
	}
}
}

return;

?>

I'm using the class in the following lines.

$telnet = new PHPTelnet();
$result = $telnet->Connect('mysystemname','root','password');

if ($result == 0) {
$telnet->DoCommand('who', $result);

$telnet->Disconnect();

And I get the following error.
[PHP Telnet] Connect failed: Login failed

I cant figure what I'm missing. Please help.

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