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31 <td><h1>CodeIgniter User Guide Version 2.0.2</h1></td>
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45 Upgrading from 1.7.1 to 1.7.2
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58 <h1>Upgrading from 1.7.1 to 1.7.2</h1>
60 <p>Before performing an update you should take your site offline by replacing the index.php file with a static one.</p>
64 <h2>Step 1: Update your CodeIgniter files</h2>
66 <p>Replace these files and directories in your "system" folder with the new versions:</p>
70 <li><dfn>system/codeigniter</dfn></li>
71 <li><dfn>system/database</dfn></li>
72 <li><dfn>system/helpers</dfn></li>
73 <li><dfn>system/language</dfn></li>
74 <li><dfn>system/libraries</dfn></li>
75 <li><dfn>index.php</dfn></li>
78 <p class="important"><strong>Note:</strong> If you have any custom developed files in these folders please make copies of them first.</p>
80 <h2>Step 2: Remove header() from 404 error template</h2>
81 <p>If you are using header() in your 404 error template, such as the case with the default <samp>error_404.php</samp> template shown below, remove that line of code.</p>
83 <code><?php header("HTTP/1.1 404 Not Found"); ?></code>
85 <p>404 status headers are now properly handled in the show_404() method itself.</p>
87 <h2>Step 3: Confirm your system_path</h2>
88 <p>In your updated index.php file, confirm that the <dfn>$system_path</dfn> variable is set to your application's system folder.</p>
90 <h2>Step 4: Update your user guide</h2>
91 <p>Please replace your local copy of the user guide with the new version, including the image files.</p>
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