Undefined variable in CodeIgniter view using submit function - php

Question

I'm trying create a website using codeigniter. The structure that I use is only using view and controller. The model is directly in controller.
So, i got this error message:
Severity: Notice
Message: Undefined variable: view
Filename: template/default.php
Line Number: 146
And this is my code on controller (artikeladmin.php)
public function add()
{
if($this->input->post())
{
$judul = $this->input->post('judul');
$kategori_id = $this->input->post('kategori_id');
$tanggal = $this->input->post('tanggal');
$gambar = $this->input->post('gambar');
$published = $this->input->post('published');
$deskripsi = $this->input->post('deskripsi');
$config['upload_path'] ='assets/images/upload/';
$config['allowed_types'] ='jpeg|png|gif|jpg';
$config['max_size'] ='*';
$config['max_width'] ='*';
$config['max_height'] ='*';
$this->load->library('upload', $config);
if(!$this->upload->do_upload())
{
$data['error'] = array('error' =>$this->upload->display_errors());
$this->load->view('admin/template/default', $data);
}
else
{
$attr = $this->upload->data();
$args = array(
'gambar' => $attr['file_name'],
'kategori_id' => $kategori_id,
'judul' => $judul,
'published' => $published,
'tanggal' => $tanggal,
'deskripsi' => $deskripsi
);
$this->db->insert('artikel', $args);
$this->session->set_flashdata('message','Data berhasil disimpan');
redirect('artikeladmin');
}
}
$user = $this->session->userdata('myuser');
if(!isset($user) or empty($user))
redirect('login');
$sql = " SELECT * FROM kategori";
$query = $this->db->query($sql);
$kategori = $query->result_array();
$data['view'] = 'admin/add_article';
$data['kategori'] = $kategori;
$data['action'] = 'artikeladmin/add/';
$this->load->view('admin/template/default', $data);
}
And this is my view (template/default.php)
<div id="content" class="span10">
<?php $this->load->view($view); ?>
</div>
in my controller you can see that i have define variable view like this
$data['view'] = 'admin/add_article';
And im trying to add new variable like
$data['view'] = $data;
but the error still happen

Answer 1

If do_upload() fails it will load the view without the $view variable being set:
if(!$this->upload->do_upload())
{
$data['error'] = array('error' =>$this->upload->display_errors());
$this->load->view('admin/template/default', $data);
}
default.php looks for $view
<?php $this->load->view($view); ?>
and you get the Undefined variable error.
Try instantiating $view before any calls to default.php are made.