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docs: small improvement Upgrading from 3.x to 4.x #5121

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paulbalandan merged 1 commit into from
Sep 24, 2021
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docs: small improvement Upgrading from 3.x to 4.x #5121

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2 changes: 2 additions & 0 deletions user_guide_src/source/installation/upgrade_4xx.rst
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Expand Up @@ -127,6 +127,8 @@ Upgrading Libraries
`Trackback <http://codeigniter.com/userguide3/libraries/trackback.html>`_,
`XML-RPC /-Server <http://codeigniter.com/userguide3/libraries/xmlrpc.html>`_,
and `Zip Encoding <http://codeigniter.com/userguide3/libraries/zip.html>`_.
- CI3's `Input <http://codeigniter.com/userguide3/libraries/input.html>`_ corresponds to CI4's :doc:`IncomingRequest </incoming/incomingrequest>`.
- CI3's `Output <http://codeigniter.com/userguide3/libraries/output.html>`_ corresponds to CI4's :doc:`Responses </outgoing/response>`.
- All the other libraries, which exist in both CodeIgniter versions, can be upgraded with some adjustments.
The most important and mostly used libraries received an Upgrade Guide, which will help you with simple
steps and examples to adjust your code.
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