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#############################
Upgrading from 3.0.5 to 3.0.6
#############################
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 all files and directories in your *system/* directory.
.. note:: If you have any custom developed files in these directories,
please make copies of them first.
Step 2: Remove 'prep_for_form' usage (deprecation)
==================================================
The :doc:`Form Validation Library <../libraries/form_validation>` has a
``prep_for_form()`` method, which is/can also be used as a rule in
``set_rules()`` to automatically perform HTML encoding on input data.
Automatically encoding input (instead of output) data is a bad practice in
the first place, and CodeIgniter and PHP itself offer other alternatives
to this method anyway.
For example, :doc:`Form Helper <../helpers/form_helper>` functions will
automatically perform HTML escaping when necessary.
Therefore, the *prep_for_form* method/rule is pretty much useless and is now
deprecated and scheduled for removal in 3.1+.
.. note:: The method is still available, but you're strongly encouraged to
remove its usage sooner rather than later.
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