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<td><h1>CodeIgniter User Guide Version 2.1.2</h1></td>
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Upgrading from 2.1.0 to 2.1.1
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<h1>Upgrading from 2.1.0 to 2.1.1</h1>

<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>
	
<h2>Step 2: Replace config/mimes.php</h2>

<p>This config file has been updated to contain more user mime-types, please copy it to <kbd>application/config/mimes.php</kbd>.</p>

<h2>Step 3: Update your IP address tables:</h2>

<p>This upgrade adds support for IPv6 IP addresses. In order to store them, you need to enlarge your <var>ip_address</var> columns to 45 characters. For example, CodeIgniter's session table will need to change:</p>

<code>ALTER TABLE ci_sessions CHANGE ip_address ip_address varchar(45) default '0' NOT NULL</code>

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