无法在CodeIgniter中显示数据

this is my code
<?php foreach($monitor as $mnt){ ?>
<?php    
 // Set Variables:
    mysql_connect("localhost","root","") or die (mysql_error());
    mysql_select_db("monitor") or die (mysql_error());
    $hasil = mysql_query("SELECT * FROM device") or die (mysl_error());
    $row = mysql_fetch_array($hasil);
// Clean output function - Removes the extras given by SNMP
function clean_output($string) {
    $clean_output = preg_replace("/[A-Za-z]*:[ ]/", "", $string);
    $clean_output = preg_replace("/[(][0-9]*[)][ ]/", "", $clean_output);
    $clean_output = str_replace("Gauge32", "", $clean_output);
    $clean_output = str_replace("Counter32", "", $clean_output);
    $clean_output = preg_replace("/[(][0-9][)]/", "", $clean_output);
    return $clean_output;
}
 
// Create specific OIDs

$sysUptime = "1.3.6.1.2.1.1.3.0";

# Check that we are able to contact the system, If we are then run the rest of the SNMP gets.
$oo8 = clean_output(snmpget($row['host'],$row['comm'],$sysUptime));
 
if($oo8 != "") { 
    // Now we know that we can contact the device, run the other SNMP gets.
    
    $oo8 = clean_output(snmpget($row['host'],$row['comm'],$sysUptime));
    
    }
 
// Show the System stats at the start of the table.

echo "<center><br><b>Uptime:</b></br></center><center> $oo8</center>";

?>
<?php } ?>

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class home extends CI_Controller {

    public function index()
    {
    $comp = array(
    "header" => $this->load->view("header",array(),true),
    "monitor" => $this->html_monitor(),
    );
        $this->load->view("index",$comp);
    }
    public function html_monitor(){
    $data = array(
    "device" => $this->mymodel->GetDevice(),
    );
    return $this->load->view("monitor",$data,true);
}
}