php - how can i upload images in Codeigniter -

i have problem when upload images in codeigniter, have controller upload images :-

 public function index() {     $this->load->model('blog');     $type = "text";     if (isset($_post['post'])) {         if (isset($_post['type']) && $_post['type'] == "image") {             $type = "image";         }         if (strlen($_files['inputupprofile']['name']) > 0) {             $config['upload_path'] = './uploads/';             $config['allowed_types'] = 'gif|jpg|png';             $config['max_size'] = '2048';             $config['encrypt_name'] = true;             $this->load->library('upload', $config);             if (!$this->upload->do_upload('inputupprofile')) {                 $error = $this->upload->display_errors();                 if (is_array($error)) {                     foreach ($error $er) {                         $this->errors[] = $er;                     }                 } else {                     $this->errors[] = $error;                 }             } else {                 $updata = $this->upload->data();                 $imagepath = './uploads/' . $eventpic;                 if (file_exists($imagepath)) {                     @unlink($imagepath);                 }                 $eventpic = $updata['raw_name'] . $updata['file_ext'];             }         }         $result = $this->blog->addpost($_session['user_id'], $type, $this->input->post('post'), $eventpic);     }      $result = $this->blog->getposts($_session['user_id'], 0, 10);     $this->template->build("home_view", array("response" => $result)); } 

and view :-

<div class="textstatus">     <input id="inputupprofile" name="inputupprofile"            class="inputupprofile hidefile" type="file"/>     <input type="button" id="picupprofile" class="sentpic" value="addpic">     <input name="post" type="text" id="text" placeholder="message ...">     <input type="submit" id="sent" value="send"> </div> </form> </div> 

when upload thee images in site error display :-

severity: notice  message: undefined index: inputupprofile  filename: controllers/home.php  line number: 47 

and

a php error encountered  severity: notice  message: undefined variable: eventpic  filename: controllers/home.php  line number: 74 

and

a php error encountered  severity: warning  message: cannot modify header information - headers sent (output started @ d:\appserv\www\sys\system\core\exceptions.php:185)  filename: core/common.php  line number: 442 

so problem in code.

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edit :-

array ( [upload_data] => array ( [file_name] => 67429_133961013479569_306349156_n3.jpg [file_type] => image/jpeg [file_path] => d:/appserv/www/d5n/rashaqa2/uploads/ [full_path] => d:/appserv/www/d5n/rashaqa2/uploads/67429_133961013479569_306349156_n3.jpg [raw_name] => 67429_133961013479569_306349156_n3 [orig_name] => 67429_133961013479569_306349156_n.jpg [client_name] => 67429_133961013479569_306349156_n.jpg [file_ext] => .jpg [file_size] => 34.05 [is_image] => 1 [image_width] => 720 [image_height] => 540 [image_type] => jpeg [image_size_str] => width="720" height="540" ) )  

i need array [file_name] save in db, how can read this.

  if($_files['nameofinputtype']['error'] == upload_err_ok)     {        // file uploaded              $config['upload_path'] = './uploads/';             $config['allowed_types'] = 'gif|jpg|png';             $config['max_size'] = '100';             $config['max_width']  = '1024';             $config['max_height']  = '768';              $this->load->library('upload', $config);             $imagen = $this->upload->do_upload();     }