Upload Gambar

$jam      = time();
        $username = $this->session->userdata('username');

        $config['file_name']     = 'Avatar_' . $username . '_' . $jam . '.jpg';
        $config['upload_path']   = './img/icon/';
        $config['allowed_types'] = 'jpg|png|gif|jpeg';
        $config['overwrite']     = true;
        $config['max_size']      = 0;
        $this->load->library('upload');
        $this->upload->initialize($config);

        // Resize
        $configThumb                   = array();
        $configThumb['image_library']  = 'gd2';
        $configThumb['source_image']   = '';
        $configThumb['maintain_ratio'] = true;
        $configThumb['overwrite']      = true;
        $configThumb['width']          = 150;
        $configThumb['height']         = 150;
        $this->load->library('image_lib');

        if (!$this->upload->do_upload('foto')) {
            $response['status'] = 'error';
        } else {
            $upload                      = $this->upload->do_upload('foto');
            $upload_data                 = $this->upload->data();
            $name_array[]                = $upload_data['file_name'];
            $configThumb['source_image'] = $upload_data['full_path'];
            $this->image_lib->initialize($configThumb);
            $this->image_lib->resize();

            // SImpan Data
            $data = array(
                'user_avatar'      => $this->upload->file_name,
            );

            $this->db->insert('pasar_users', $data);
            $response['status'] = 'success';
        }

echo json_encode($response);