私は現在、各ユーザーが自分の画像セクションをアップロードできる対話型プロファイルのギャラリーを codeigniter を使用して開発しています。現在、ビュー ページでメッセージ: Undefined variable: images. がスローされています。これは、モデルに get_images 関数が既にあるにもかかわらず、ビューに if ステートメントがあるため、まだアップロードされていない場合は画像を表示しないことを理解できます。この問題を解決するにはどうすればよいですか? また、ギャラリーデータベースにアップロードされた画像を保存して、各ユーザーの名前の横にアップロードした画像を表示しようとしています。これまでの私のコードは次のとおりです。
コントローラ:
class Gallery extends CI_Controller {
function __construct()
{
    // Call the parent construct
    parent::__construct();
    $this->load->model("profiles");
    $this->load->model("gal_model");
    $this->load->helper(array('form', 'url'));
    $this->gallery_path = 'web-project-jb/assets/gallery';
    $this->gallery_path_url = base_url().'web-project-jb/assets/gallery/';
}
function upload()
{
    $config = array(
            'allowed_types' =>'gif|jpg|jpeg|png',
            'upload_path' => $this->gallery_path,
            'max_size' => 10000,
            'max_width' => 1024,
            'max_height' => 768);
    $this->load->library('upload', $config);
    $image_data = $this->upload->data();
    $config = array(
            'source_image'  => $image_data["full_path"],
            'new_image'     => $this->gallery_path. '/thumbs',
            'maintain_ration'   => true,
            'width' => 150,
            'height' => 100
    );
    $this->load->library("image_lib", $config);
    $this->image_lib->resize();
    $username = $this->session->userdata('username');
    if ( ! $this->upload->do_upload())
    {
        $error = array('error' => $this->upload->display_errors());
        $username = $this->session->userdata('username');
        $viewData['username'] = $username;
        $this->load->view('shared/header');
        $this->load->view('gallery/galtitle', $viewData);
        $this->load->view('shared/nav');
        $this->load->view('gallery/galview', $error, $viewData, array('error' => ' ' ));
        $this->load->view('shared/footer');
    }
    else
    {
        $file_data  = $this->upload->data();
        $image = $this->gallery_path.$file_data['file_name'];
        $data['image'] = $this->gallery_path.$file_data['file_name'];
        $this->username = $this->session->userdata('username');
        $this->gal_model->putGalleryImage($username, $image);
        $this->session->set_userdata($image);
        $viewData['username'] = $username;
        $data['gal_model'] = $this->gal_model->get_images($username);
        $username = $this->session->userdata('username');
        $this->load->view('shared/header');
        $this->load->view('gallery/galtitle', $viewData);
        $this->load->view('shared/nav');
        $this->load->view('gallery/galview', $data, $viewData);
        $this->load->view('shared/footer');
    }
}
function index()
{
    $username = $this->session->userdata('username');
    $this->load->library('upload');
    $data['profileimages'] = $this->gal_model->get_images($username);
    $file_data = $this->upload->data();
    $file_data['file_name'] = $this->gal_model->get_images($username);
    $image = $this->gallery_path.$file_data['file_name'];
    $data['image'] = $file_data['file_name'];
    $viewData['username'] = $username;
    $this->load->view('shared/header');
    $this->load->view('gallery/galtitle', $viewData);
    $this->load->view('shared/nav');
    $this->load->view('gallery/galview', $viewData, $data, array('error' => ' ' ));
    $this->load->view('shared/footer');
}
 }
モデル:
 class Gal_model extends CI_Model
{
var $gallery_path;
var $gallery_path_url;
function Gal_model()
{
    parent::__construct();
    $this->gallery_path = 'web-project-jb/assets/gallery';
    $this->gallery_path_url = base_url().'web-project-jb/assets/gallery/';
}   
function exists($username)
{
    $this->db->select('*')->from("gallery")->where('user', $username);
    $query = $this->db->get();
    if ($query->num_rows() > 0)
    {
        return true;
        /*
         echo "user $user exists!";
        $row = $query->row();
        echo " and his profileimage is $row->profileimage";
        */
    }
    else
    {
        return false;
        //echo "no such user as $user!";
    }
}
function putGalleryImage($username, $image)
{
    $record = array('user' => $username, 'galleryimage' => $image);
    $this->session->set_userdata($image);
    if ($this->exists($username))
    {
        $this->db->where('user', $username)->update('gallery', $record);
    }
    else
    {
        $this->db->where('user', $username)->insert('gallery', $record);
    }
}
function get_images($username)
{
    $this->db->select('*')->from('gal_model')->where('user', $username);
    $files = scandir($this->gallery_path);
    $files = array_diff($files, array('.', '..', 'thumbs'));
    $images = array();
    foreach ($files as $file){
        $images[] = array(
            'url'   => $this->gallery_path_url.$file,
            'thumb_url' => $this->gallery_path_url.'thumbs/'.$file
                );
    }
    return $images;
}
  }
意見:
 <?php if ( is_array($images) && (count($images)>0) ):
   foreach($images as $image): ?>
   <div class="thumb">
       <a href="<?php echo $image['url']; ?>">
          <img src ="<?php echo $image['thumb_url']; ?>"/>
       </a>  
       <br>
   </div>
<?php endforeach; else:  ?>
    <div id = "blank_gallery">Please upload an Image</div>
<?php endif; ?>
すべての助けてくれてありがとう