Upgrade Encryption ##################

.. contents:: :local: :depth: 2

Documentations

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• Encryption Library Documentation CodeIgniter 3.x <http://codeigniter.com/userguide3/libraries/encryption.html>_
• :doc:Encryption Service Documentation CodeIgniter 4.x </libraries/encryption>

What has been changed

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• The support for MCrypt has been dropped, as that has been deprecated as of PHP 7.2.

Upgrade Guide

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1. Within your configs the $config['encryption_key'] = 'abc123'; moved from application/config/config.php to public $key = 'abc123'; in app/Config/Encryption.php.
2. If you need to decrypt data encrypted with CI3's Encryption, configure settings to maintain compatibility. See :ref:encryption-compatible-with-ci3.
3. Wherever you have used the encryption library you have to replace $this->load->library('encryption'); with $encrypter = service('encrypter'); and change the methods for encryption and decrypting like in the following code example.

Code Example

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CodeIgniter Version 3.x

.. literalinclude:: upgrade_encryption/ci3sample/001.php

CodeIgniter Version 4.x

.. literalinclude:: upgrade_encryption/001.php