# CodeIgniter 用户指南 版本 2.2.0

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# Upgrading from 1.7.0 to 1.7.1

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

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

## Step 2: Update your user guide

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

翻译贡献者: Hex
最后修改: 2009-02-22 00:32:06