Upgrading from 2.1.4 to 2.2.x
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Note:

  The Encrypt Class now requires the Mcrypt extension. If you were
  previously using the Encrypt Class without Mcrypt, then this is a
  breaking change.  You must install the Mcrypt extension in order to
  upgrade. For information on installing Mcrypt please see the PHP
  *documentation <http://php.net/manual/en/mcrypt.setup.php>*.

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
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Replace all files and directories in your “system” folder.

Note:

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