在CodeIgniter中，建立回到前一頁的功能

codeigniter_back_to_previous_page_function.php

<?php
//

function __construct()
 {
       parent::__construct();

       [...]
 
 if (isset($_SERVER['HTTP_REFERER']))
 {
 $this->session->set_userdata('previous_page', $_SERVER['HTTP_REFERER']);
 }
 else
 {
 $this->session->set_userdata('previous_page', base_url());
 }
 
 //
 
 } 
function dosomething()
 {
  $this->user_model->deleteUser();
  redirect($this->session->userdata('previous_page'));
 }