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<div class="section" id="upgrading-from-1-5-0-to-1-5-2">
<h1>Upgrading from 1.5.0 to 1.5.2<a class="headerlink" href="#upgrading-from-1-5-0-to-1-5-2" title="Permalink to this headline">¶</a></h1>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">The instructions on this page assume you are running version
1.5.0 or 1.5.1. If you have not upgraded to that version please do so
first.</p>
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<p>Before performing an update you should take your site offline by
replacing the index.php file with a static one.</p>
<div class="section" id="step-1-update-your-codeigniter-files">
<h2>Step 1: Update your CodeIgniter files<a class="headerlink" href="#step-1-update-your-codeigniter-files" title="Permalink to this headline">¶</a></h2>
<p>Replace these files and directories in your “system” folder with the new
versions:</p>
<ul class="simple">
<li>system/helpers/download_helper.php</li>
<li>system/helpers/form_helper.php</li>
<li>system/libraries/Table.php</li>
<li>system/libraries/User_agent.php</li>
<li>system/libraries/Exceptions.php</li>
<li>system/libraries/Input.php</li>
<li>system/libraries/Router.php</li>
<li>system/libraries/Loader.php</li>
<li>system/libraries/Image_lib.php</li>
<li>system/language/english/unit_test_lang.php</li>
<li>system/database/DB_active_rec.php</li>
<li>system/database/drivers/mysqli/mysqli_driver.php</li>
<li>codeigniter/</li>
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<p class="first admonition-title">Note</p>
<p class="last">If you have any custom developed files in these folders please
make copies of them first.</p>
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<div class="section" id="step-2-update-your-user-guide">
<h2>Step 2: Update your user guide<a class="headerlink" href="#step-2-update-your-user-guide" title="Permalink to this headline">¶</a></h2>
<p>Please also replace your local copy of the user guide with the new
version.</p>
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