can a custom helper extend library in codeigniter - codeigniter

Question

I am trying to make a helper for Image Uploading. Can I extend the library inside a custom helper? I had try to use it and it never works.
<?php
/*
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*/
function FileUploadd($r)
{
$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'gif|jpg|png';
$config['max_size'] = '100';
$config['max_width'] = '1024';
$config['max_height'] = '768';
$this->load->library('upload', $config);
if ( ! $this->upload->do_upload($r))
{
echo $this->upload->display_errors();
}
else
{
$Dder=$this->upload->data();
return $Dder['file_name'];
}
}

Answer 1

I see you want to call the library inside your helper and not to extend it. You should call get_instance() first because $this only works oncontrollers and models. If you want to use a helper or library you need to call the get Codeigniter's instance first
Your code should look like this:
class Your_helper_name{
private $CI;
function __construct(){
$this->CI =& get_instance();
}
function FileUploadd($r) {
$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'gif|jpg|png';
$config['max_size'] = '100';
$config['max_width'] = '1024';
$config['max_height'] = '768';
$this->CI->load->library('upload', $config);
if ( ! $this->CI->upload->do_upload($r))
{
echo $this->CI->upload->display_errors();
}
else
{
$Dder=$this->CI->upload->data();
return $Dder['file_name'];
}
}
}
Let me know if you need clarification. If this answers your question, please mark this as answer. Thanks!