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<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
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  <div class="section" id="upgrading-from-1-6-3-to-1-7-0">
<h1>Upgrading from 1.6.3 to 1.7.0<a class="headerlink" href="#upgrading-from-1-6-3-to-1-7-0" title="Permalink to this headline">¶</a></h1>
<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/codeigniter</li>
<li>system/database</li>
<li>system/helpers</li>
<li>system/language</li>
<li>system/libraries</li>
</ul>
<div class="admonition note">
<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>
</div>
</div>
<div class="section" id="step-2-update-your-session-table">
<h2>Step 2: Update your Session Table<a class="headerlink" href="#step-2-update-your-session-table" title="Permalink to this headline">¶</a></h2>
<p>If you are using the Session class in your application, AND if you are
storing session data to a database, you must add a new column named
user_data to your session table. Here is an example of what this column
might look like for MySQL:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">user_data</span> <span class="nx">text</span> <span class="k">NOT</span> <span class="k">NULL</span>
</pre></div>
</div>
<p>To add this column you will run a query similar to this:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">ALTER</span> <span class="nx">TABLE</span> <span class="sb">`ci_sessions`</span> <span class="nx">ADD</span> <span class="sb">`user_data`</span> <span class="nx">text</span> <span class="k">NOT</span> <span class="k">NULL</span>
</pre></div>
</div>
<p>You’ll find more information regarding the new Session functionality in
the <a class="reference internal" href="../libraries/sessions.html"><span class="doc">Session class</span></a> page.</p>
</div>
<div class="section" id="step-3-update-your-validation-syntax">
<h2>Step 3: Update your Validation Syntax<a class="headerlink" href="#step-3-update-your-validation-syntax" title="Permalink to this headline">¶</a></h2>
<p>This is an <strong>optional</strong>, but recommended step, for people currently
using the Validation class. CI 1.7 introduces a new <a class="reference internal" href="../libraries/form_validation.html"><span class="doc">Form Validation
class</span></a>, which deprecates the old
Validation library. We have left the old one in place so that existing
applications that use it will not break, but you are encouraged to
migrate to the new version as soon as possible. Please read the user
guide carefully as the new library works a little differently, and has
several new features.</p>
</div>
<div class="section" id="step-4-update-your-user-guide">
<h2>Step 4: Update your user guide<a class="headerlink" href="#step-4-update-your-user-guide" title="Permalink to this headline">¶</a></h2>
<p>Please replace your local copy of the user guide with the new version,
including the image files.</p>
</div>
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