codeigniter flash message not working - php

Question

I could not display flash message in my project (view file), any body help I kill my several time to display $flash message in my view page. I am new in counterfeiter, trying to learn something from online.
Controller :
function delete_image($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);
}
View File :
<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">
<i class="halflings-icon white chevron-up"></i>
<i class="halflings-icon white remove"></i>
</div>
</div>
<div class="box-content">
<?php
if($picture==""){
?>
<button type="button" class="btn btn-primary">Upload Image</button>
<?php
}
else
{
?>
<button type="button" class="btn btn-danger">Delete Image</button>
<?php
}
if($update_id>2){
?>
<button type="button" class="btn btn-danger">Delete Blog Entry</button>
<?php
}
?>
<button type="button" class="btn btn-default">View Blog Entry</button>
</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">
<i class="halflings-icon white chevron-up"></i>
<i class="halflings-icon white remove"></i>
</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">
<i class="halflings-icon white chevron-up"></i>
<i class="halflings-icon white remove"></i>
</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

If you want to get the flashdata message you have set
Try
<?php if($this->session->flashdata('item')) {?>
<?php echo $this->session->flashdata('item');?>
<?php }?>

Answer 2

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

Answer 3

In your controller change
$flash_msg = "The image was successfully deleted.";
$value = '<div class="alert alert-success" role="alert">'.$flash_msg.'</div>';
$this->session->set_flashdata('item', $value);
To
$this->session->set_flashdata('item', 'The image was successfully deleted.');
In your view page add
<?php if($this->session->flashdata('item')){ ?>
<div class="alert alert-success">
<h4><?php echo $this->session->flashdata('item'); ?></h4>
</div>
<?php } ?>