codeigniter flash message ne fonctionne pas

Question

Je ne pouvais pas afficher de message flash dans mon projet (voir le fichier), tout le corps aide je tue mon temps pour afficher $ flash message dans ma page de vue. Je suis nouveau dans la contrefaçon, essayant d'apprendre quelque chose de en ligne.

Controller : 
function delete_image($update_id) 
    { 
     if(!is_numeric($update_id)) 
    { 
     redirect('site_security/not_allowed'); 
    } 
    $this->load->library('session'); 
    $this->load->module('site_security'); 
    $this->site_security->_make_sure_is_admin(); 

    $data = $this->fetch_data_from_db($update_id); 

    $picture = $data['picture']; 
    $big_pic_path = './media/blog_pics/'.$picture; 
    $small_picture = str_replace('.', '_thumb.', $picture); 

    $small_pic_path = './media/blog_pics/'.$small_picture; 

    //attempt to remove the images 
    if (file_exists($big_pic_path)) { 
     unlink($big_pic_path); 
    } 

    if (file_exists($small_pic_path)) { 
     unlink($small_pic_path); 
    } 
    //update the database 
    unset($data); 
    $data['picture'] = ""; 
    $this->_update($update_id, $data); 
    $flash_msg = "The image was successfully deleted."; 
    $value = '<div class="alert alert-success" role="alert">'.$flash_msg.'</div>'; 
    $this->session->set_flashdata('item', $value); 

    redirect('blog/create/'.$update_id); 
    } 

Voir fichier:

<h1><?= $headline ?></h1> 
<?= validation_errors("<p style='color: red;'>", "</p>") ?> 
<?php 
if(isset($flash)){ 
    echo $flash; 
} 
?> 
<?php 
if(is_numeric($update_id)) { ?> 
<div class="row-fluid sortable"> 
    <div class="box span12"> 
     <div class="box-header" data-original-title> 
      <h2><i class="halflings-icon white edit"></i><span class="break"></span>Additional Option</h2> 
      <div class="box-icon"> 
       <a href="#" class="btn-minimize"><i class="halflings-icon white chevron-up"></i></a> 
       <a href="#" class="btn-close"><i class="halflings-icon white remove"></i></a> 
      </div> 
     </div> 
     <div class="box-content"> 

      <?php 
      if($picture==""){ 
      ?> 

      <a href="<?= base_url() ?>blog/upload_image/<?= $update_id ?>"><button type="button" class="btn btn-primary">Upload Image</button></a> 
      <?php 
      } 
      else 
      { 
      ?> 
      <a href="<?= base_url() ?>blog/delete_image/<?= $update_id ?>"><button type="button" class="btn btn-danger">Delete Image</button></a> 
      <?php 
      } 

     if($update_id>2){ 
     ?> 
      <a href="<?= base_url() ?>blog/deleteconf/<?= $update_id ?>"><button type="button" class="btn btn-danger">Delete Blog Entry</button></a> 
     <?php 
     } 
     ?> 
      <a href="<?= base_url().$page_url ?>"><button type="button" class="btn btn-default">View Blog Entry</button></a> 
     </div> 
    </div><!--/span--> 
</div><!--/row--> 
<?php 
} 
?> 

<div class="row-fluid sortable"> 
    <div class="box span12"> 
     <div class="box-header" data-original-title> 
      <h2><i class="halflings-icon white edit"></i><span class="break"></span>Blog Entry Details</h2> 
      <div class="box-icon"> 
       <a href="#" class="btn-minimize"><i class="halflings-icon white chevron-up"></i></a> 
       <a href="#" class="btn-close"><i class="halflings-icon white remove"></i></a> 
      </div> 
     </div> 
     <div class="box-content"> 
     <?php 
     $form_location = base_url()."blog/create/".$update_id; 
     ?> 
      <form class="form-horizontal" method="post" action="<?= $form_location ?>"> 
       <fieldset> 
       <div class="control-group"> 
        <label class="control-label" for="typeahead">Date Published </label> 
        <div class="controls"> 
        <input type="text" name="date_published" class="input-xlarge datepicker" id="date01" value="<?= $date_published ?>"> 
        </div> 
       </div> 
       <div class="control-group"> 
        <label class="control-label" for="typeahead">Blog Entry Title </label> 
        <div class="controls"> 
        <input type="text" class="span7" name="page_title" value="<?= $page_title ?>"> 
        </div> 
       </div> 

       <div class="control-group hidden-phone"> 
        <label class="control-label">Blog Entry Keywords</label> 
        <div class="controls"> 
        <textarea class="span7" rows="3" name="page_keywords"><?php echo $page_keywords; ?> </textarea> 
        </div> 
       </div> 
       <div class="control-group hidden-phone"> 
        <label class="control-label">Blog Entry Description</label> 
        <div class="controls"> 
        <textarea class="span7" rows="3" name="page_description"><?php echo $page_description; ?> </textarea> 
        </div> 
       </div> 

       <div class="control-group hidden-phone"> 
        <label class="control-label" for="textarea2">Blog Entry Content</label> 
        <div class="controls"> 
        <textarea class="cleditor" id="textarea2" rows="3" name="page_content"><?php echo $page_content; ?> </textarea> 
        </div> 
       </div> 
       <div class="control-group"> 
        <label class="control-label" for="typeahead">Author </label> 
        <div class="controls"> 
        <input type="text" class="span7" name="author" value="<?= $author ?>"> 
        </div> 
       </div> 
       <div class="form-actions"> 
        <button type="submit" class="btn btn-primary" name="submit" value="Submit">Submit</button> 
        <button type="submit" name="submit" value="Cancel" class="btn">Cancel</button> 
       </div> 
       </fieldset> 
      </form> 

     </div> 
    </div><!--/span--> 
</div><!--/row--> 

<?php 
if(isset($picture) && ($picture!=null)){ 
?> 
<div class="row-fluid sortable"> 
    <div class="box span12"> 
     <div class="box-header" data-original-title> 
      <h2><i class="halflings-icon white edit"></i><span class="break"></span>Image</h2> 
      <div class="box-icon"> 
       <a href="#" class="btn-minimize"><i class="halflings-icon white chevron-up"></i></a> 
       <a href="#" class="btn-close"><i class="halflings-icon white remove"></i></a> 
      </div> 
     </div> 
     <div class="box-content"> 
      <img src="<?= base_url() ?>media/blog_pics/<?= $picture ?>" class="thumbnail" width="100"> 
     </div> 
    </div><!--/span--> 
</div><!--/row--> 
<?php 
} 
?> 

Answer 1

Si vous voulez obtenir le message flashdata que vous avez défini

Essayez

<?php if($this->session->flashdata('item')) {?> 
<?php echo $this->session->flashdata('item');?> 
<?php }?> 

Answer 2

Votre changement juste ce code

<?php 
if(isset($flash)){ 
    echo $flash; 
} 
?> 

Pour

<?php 
if(isset($this->session->flashdata('item'))){ 
    echo $flash; 
} 
?> 

Answer 3

Dans votre changement de contrôleur

$flash_msg = "The image was successfully deleted."; 
$value = '<div class="alert alert-success" role="alert">'.$flash_msg.'</div>'; 
$this->session->set_flashdata('item', $value); 

Pour

$this->session->set_flashdata('item', 'The image was successfully deleted.'); 

À votre avis ajouter la page

<?php if($this->session->flashdata('item')){ ?> 
<div class="alert alert-success"> 
<h4><?php echo $this->session->flashdata('item'); ?></h4> 
      </div> 
      <?php } ?>