Upgrading from 1.7.1 to 1.7.2
*****************************

Before performing an update you should take your site offline by
replacing the index.php file with a static one.


Step 1: Update your CodeIgniter files
=====================================

Replace these files and directories in your “system” folder with the
new versions:

* system/codeigniter

* system/database

* system/helpers

* system/language

* system/libraries

* index.php

Note:

  If you have any custom developed files in these folders please make
  copies of them first.


Step 2: Remove header() from 404 error template
===============================================

If you are using header() in your 404 error template, such as the case
with the default error_404.php template shown below, remove that line
of code.

   <?php header("HTTP/1.1 404 Not Found"); ?>

404 status headers are now properly handled in the show_404() method
itself.


Step 3: Confirm your system_path
================================

In your updated index.php file, confirm that the $system_path variable
is set to your application’s system folder.


Step 4: Update your user guide
==============================

Please replace your local copy of the user guide with the new version,
including the image files.
