ERROR: Unable to find target file destination: $destination

function _init_video_settings() {
<br> $video_settings['max_file_size'] = 10000024;
<br> $video_settings['destination'] = 'store_items_video';
<br> $video_settings['target_column_name'] = 'video';
<br> $video_settings['upload_to_module'] = true;
<br>
<br> return $video_settings;
<br> }
<br>function _make_sure_got_video_destination_folders($update_id,$video_settings) {
<br>
<br> $destination = $video_settings['destination'];
<br>
<br> if ($video_settings['upload_to_module'] == true) {
<br> $target_dir = APPPATH.'modules/'.segment(1).'/assets/'.$destination.'/'.$update_id;
<br> } else {
<br> $target_dir = APPPATH.'public/'.$destination.'/'.$update_id;
<br> }
<br>
<br> if (!file_exists($target_dir)) {
<br>
<br> mkdir($target_dir, 0777, true);
<br> }
<br>
<br> }
<br>
<br>function submit_upload_video($update_id) {
<br>
<br>
<br> if ($_FILES['video']['name'] == '') {
<br> redirect($_SERVER['HTTP_REFERER']);
<br> }
<br>
<br> $submit = post('submit');
<br>
<br> if ($submit == 'Upload') {
<br> $video_settings = $this-&gt;_init_video_settings();
<br> extract($video_settings);
<br>
<br> $validation_str = 'allowed_types[mp4]|max_size['.$max_file_size.']';
<br> $this-&gt;validation_helper-&gt;set_rules('video', 'item video', $validation_str);
<br>
<br> $result = $this-&gt;validation_helper-&gt;run();
<br>
<br> if ($result == true) {
<br>
<br> $config['destination'] = $destination.'/'.$update_id;
<br>
<br> //upload the video
<br> $config['upload_to_module'] = (!isset($video_settings['upload_to_module']) ? false : $video_settings['upload_to_module']);
<br> $this-&gt;upload_file($config);
<br>
<br> //update the database
<br> $data[$target_column_name] = $_FILES['video']['name'];
<br> //$data['item_id']=$update_id;
<br> //json($data,true);
<br> $this-&gt;model-&gt;update($update_id, $data);
<br> $flash_msg = 'The video was successfully uploaded';
<br> set_flashdata($flash_msg);
<br> //redirect($_SERVER['HTTP_REFERER']);
<br> //$parent_id = $this-&gt;_get_parent_id($update_id);
<br> redirect('store_items/manage');
<br> //redirect('store_items/edit/'.$update_id);
<br> } else {
<br> redirect($_SERVER['HTTP_REFERER']);
<br> //redirect('store_items/manage/'.$parent_id);
<br> }
<br> }
<br>
<br>
<br>}

Notice: Constant APPPATH already defined in D:\xampp\htdocs\yellowsme\engine\ignition.php on line 136
<br>
<br>Notice: Constant REQUEST_TYPE already defined in D:\xampp\htdocs\yellowsme\engine\ignition.php on line 137