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    <div class="topbar-hd"><h1>CodeIgniter 用户指南 版本 2.2.0</h1></div>
<div class="topbar-tip">编辑文档、查看近期更改请 <a href="#">登录</a> 或 <a href="#">注册</a> 　<a href="#">找回密码</a></div>      <div id="breadcrumb_right"><a href="../toc.html">目录页</a></div>
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<h1>Upgrading from 2.1.4 to 2.2.0</h1>

<p class="important"><strong>Note:</strong> The Encryption Class now requires the Mcrypt extension. If you were previously using the Encrypt Class without Mcrypt this is a breaking change, you must install the Mcrypt extension in order to upgrade. For information on installing Mcrypt please see the PHP <a href="#">documentation</a>.</p>

<p>Before performing an update you should take your site offline by replacing the index.php file with a static one.</p>

<h2>Step 1: Update your CodeIgniter files</h2>

<p>Replace all files and directories in your "system" folder and replace your index.php file. If any modifications were made to your index.php they will need to be made fresh in this new one.</p>

<p class="important"><strong>Note:</strong> If you have any custom developed files in these folders please make copies of them first.</p><p>&nbsp;</p>
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翻译贡献者:
Hex</div>
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最后修改: 2014-06-10 13:57:36</div>
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