A PHP Error was encountered

Severity: Notice
Message: Undefined index: title
Filename: controllers/blog.php
Line Number: 66

A PHP Error was encountered
Severity: Notice
Message: Undefined index: body
Filename: controllers/blog.php
Line Number: 67

<?php
Class Blog extends CI_controller {
function Blog(){
parent::__construct();
$this->load->helper(array('url', 'form');
$this->load->helper('text';
$this->load->model('MEntries';
}

function index() {
$data['title'] = "Blog";
$data['heading'] = "Welcome To My Blog";
$data['query'] = $this->db->get('entries';
$this->load->view('blog_view', $data);
}

function comments() {
$data['title']= "Blog";
$data['heading']= "Post Comment";
$data['query'] = $this->db->get('comments';
$this->db->where('entry_id',$this->uri->segment(3));
$this->load->view('Comment_view', $data);
}

function comment_insert(){
$this->db->insert('comments', $_POST);
redirect('blog/comments/'.$_POST['entry_id']);
}

function message(){
$data['title']= "Blog";
$data['heading']= "Post Message";
$data['query'] = $this->db->get('entries';
$this->load->view('Message_view', $data);
}

function message_insert(){
$this->db->insert('entries', $_POST);
redirect('blog';
}

function delete(){
$id = $this->uri->segement(3);
$this->MEntries->delete($id);
redirect ('blog';
}

function update(){
$data = array(
'id' => $this->input->post('id',
'title' => $this->input->post('title',
'body' => $this->input->post('body');
$id = $this->input->post('id';
$this->load->model('MEntries';
$this->MEntries->update($id, $data);
redirect('blog/edit/','refresh';
}

function edit(){
$this->load->model('MEntries';
$id = $this->uri->segment(3);
$data['result'] = $this->MEntries->select($id);
$result = $this->MEntries->select($id);


$data['title'] = $result['title']; <------//line yg bermasalah
$data['body'] = $result['body']; <------//line yg bermasalah

$this->load->view('edit',$data);

}
}
?>

<?php
class MEntries extends CI_MODEL{
function add($data){
$query = $this->db->insert('user',$data);
}

function read()
{
$query = $this->db->get('blog';
if($query->num_rows() > 0)
{
foreach ($query->result() as $key) {
$data[] = $key;
}
}
return ($data);
}

function select($id){
$this->db->where('id', $id);
$query =$this->db->get_where('entries',array('id' => $id));
return $query->row_array();
}
function update(){
$data = array(
'id' => $this->input->post('id',
'title' => $this->input->post('title',
'body' => $this->input->post('body');

$this->db->where('id', $this->input->post('id');
$this->db->update('entries', $data);
}

function delete($id){
$this->db->where('id',$id);
$this->db->delete('entries';
}
}
?>