Undefined index: in PHP codeigniter while sending variable - php

Question

My controller:
public function thread($page = 'empty')
{
$data['user_id'] = $this->tank_auth->get_user_id();
$data['username'] = $this->tank_auth->get_username();
//User data variable grab
//default template load data
$data['thread'] = $this->thread_model->get_thread($page);
$data['title'] = ucfirst($page); // Capitalize the first letter
$data['replies'] = $this->thread_model->get_reply($data['thread']['thread_id']);
$this->thread_model->view_increment($data);
$this->load->view('templates/head', $data);
$this->load->view('main/wrapper-start', $data);
$this->load->view('templates/leftbar', $data);
$this->load->view('main/thread', $data);
$this->load->view('main/wrapper-end', $data);
$this->load->view('templates/footer', $data);
}
The error appears on the $data['replies'] line:
Severity: Notice
Message: Undefined index: thread_id
Filename: controllers/main.php
Line Number: 40
Here is my model code that replies refers to: $this->thread_model->get_reply
public function get_reply($thread_id)
{
$query = $this->db->query("SELECT r.reply_id FROM reply_thread rt
INNER JOIN replies r
ON rt.reply_id = r.reply_id
WHERE thread_id = ". $thread_id);
$replies = $query->result_array();
$replyarray = array();
foreach ($replies as $reply)
{
$id = $reply['reply_id'];
$query = $this->db->query("SELECT * FROM replies WHERE reply_id='$id'");
$thisRow = $query->row_array();
$replyarray[] = $thisRow;
}
return $replyarray;
}
Any ideas why this error is popping up? Other than the error, the page loads perfectly fine...all the info is in tact and available through the query.
here is my get_thread model
public function get_thread($page)
{
$slug = $page;
$query = $this->db->get_where('thread', array('slug' => $slug));
return $query->row_array();
}
using a print_r($data['thread']); I get this array:
Array ( [thread_id] => 233 [owner_id] => 8 [subject] => Repercussions of D3 addiction [body] => 1. signs of unhygienic practices 2.become irritable when forced to stop playing 3. carpal tunnel 4. loss of interest in pursuing a significant other 5. sleep deprivation 6. malnutrition There's nothing positive about this. [timestamp] => 2012-05-08 19:03:02 [replystamp] => 2012-05-09 12:38:32 [last_post_id] => 3 [slug] => 233-repercussions-of-d3-addiction [replies_num] => 2 [views] => 21 )

Answer 1

I think you could try this:
$threadinfo = $this->thread_model->get_thread($page);
$data['thread'] = $threadinfo;
$data['replies'] = $this->thread_model->get_reply($threadinfo->thread_id);