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290<li class="toctree-l2"><a class="reference internal" href="../general/ancillary_classes.html">Creating Ancillary Classes</a></li>
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311<li class="toctree-l2"><a class="reference internal" href="../libraries/caching.html">Caching Driver</a></li>
312<li class="toctree-l2"><a class="reference internal" href="../libraries/calendar.html">Calendaring Class</a></li>
313<li class="toctree-l2"><a class="reference internal" href="../libraries/cart.html">Shopping Cart Class</a></li>
314<li class="toctree-l2"><a class="reference internal" href="../libraries/config.html">Config Class</a></li>
315<li class="toctree-l2"><a class="reference internal" href="../libraries/email.html">Email Class</a></li>
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317<li class="toctree-l2"><a class="reference internal" href="../libraries/encryption.html">Encryption Library</a></li>
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320<li class="toctree-l2"><a class="reference internal" href="../libraries/ftp.html">FTP Class</a></li>
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327<li class="toctree-l2"><a class="reference internal" href="../libraries/output.html">Output Class</a></li>
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330<li class="toctree-l2"><a class="reference internal" href="../libraries/security.html">Security Class</a></li>
331<li class="toctree-l2"><a class="reference internal" href="../libraries/sessions.html">Session Library</a></li>
332<li class="toctree-l2"><a class="reference internal" href="../libraries/table.html">HTML Table Class</a></li>
333<li class="toctree-l2"><a class="reference internal" href="../libraries/trackback.html">Trackback Class</a></li>
334<li class="toctree-l2"><a class="reference internal" href="../libraries/typography.html">Typography Class</a></li>
335<li class="toctree-l2"><a class="reference internal" href="../libraries/unit_testing.html">Unit Testing Class</a></li>
336<li class="toctree-l2"><a class="reference internal" href="../libraries/uri.html">URI Class</a></li>
337<li class="toctree-l2"><a class="reference internal" href="../libraries/user_agent.html">User Agent Class</a></li>
338<li class="toctree-l2"><a class="reference internal" href="../libraries/xmlrpc.html">XML-RPC and XML-RPC Server Classes</a></li>
339<li class="toctree-l2"><a class="reference internal" href="../libraries/zip.html">Zip Encoding Class</a></li>
340</ul>
341</li>
342</ul>
343<ul>
344<li class="toctree-l1"><a class="reference internal" href="../database/index.html">Database Reference</a><ul>
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348<li class="toctree-l2"><a class="reference internal" href="../database/queries.html">Running Queries</a></li>
349<li class="toctree-l2"><a class="reference internal" href="../database/results.html">Generating Query Results</a></li>
350<li class="toctree-l2"><a class="reference internal" href="../database/helpers.html">Query Helper Functions</a></li>
351<li class="toctree-l2"><a class="reference internal" href="../database/query_builder.html">Query Builder Class</a></li>
352<li class="toctree-l2"><a class="reference internal" href="../database/transactions.html">Transactions</a></li>
353<li class="toctree-l2"><a class="reference internal" href="../database/metadata.html">Getting MetaData</a></li>
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358<li class="toctree-l2"><a class="reference internal" href="../database/db_driver_reference.html">Database Driver Reference</a></li>
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374<li class="toctree-l2"><a class="reference internal" href="../helpers/inflector_helper.html">Inflector Helper</a></li>
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426
427 <div class="section" id="upgrading-from-3-1-1-to-3-1-2">
428<h1>Upgrading from 3.1.1 to 3.1.2<a class="headerlink" href="#upgrading-from-3-1-1-to-3-1-2" title="Permalink to this headline"></a></h1>
429<p>Before performing an update you should take your site offline by
430replacing the index.php file with a static one.</p>
431<div class="section" id="step-1-update-your-codeigniter-files">
432<h2>Step 1: Update your CodeIgniter files<a class="headerlink" href="#step-1-update-your-codeigniter-files" title="Permalink to this headline"></a></h2>
433<p>Replace all files and directories in your <em>system/</em> directory.</p>
434<div class="admonition note">
435<p class="first admonition-title">Note</p>
436<p class="last">If you have any custom developed files in these directories,
437please make copies of them first.</p>
438</div>
439</div>
440<div class="section" id="step-2-update-your-ci-sessions-database-table">
441<h2>Step 2: Update your “ci_sessions” database table<a class="headerlink" href="#step-2-update-your-ci-sessions-database-table" title="Permalink to this headline"></a></h2>
442<p>If you’re using the <a class="reference internal" href="../libraries/sessions.html"><span class="doc">Session Library</span></a> with the
443‘database’ driver, you may have to <code class="docutils literal"><span class="pre">ALTER</span></code> your sessions table for your
444sessions to continue to work.</p>
445<div class="admonition note">
446<p class="first admonition-title">Note</p>
447<p class="last">The table in question is not necessarily named “ci_sessions”.
448It is what you’ve set as your <code class="docutils literal"><span class="pre">$config['sess_save_path']</span></code>.</p>
449</div>
450<p>This will only affect you if you’ve changed your <code class="docutils literal"><span class="pre">session.hash_function</span></code>
451<em>php.ini</em> setting to something like ‘sha512’. Or if you’ve been running
452an older CodeIgniter version on PHP 7.1+.</p>
453<p>It is recommended that you do this anyway, just to avoid potential issues
454in the future if you do change your configuration.</p>
455<p>Just execute the one of the following SQL queries, depending on your
456database:</p>
457<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="c1">// MySQL:</span>
458<span class="nx">ALTER</span> <span class="nx">TABLE</span> <span class="nx">ci_sessions</span> <span class="nx">CHANGE</span> <span class="nx">id</span> <span class="nx">id</span> <span class="nx">varchar</span><span class="p">(</span><span class="mi">128</span><span class="p">)</span> <span class="k">NOT</span> <span class="k">NULL</span><span class="p">;</span>
459
460<span class="c1">// PostgreSQL</span>
461<span class="nx">ALTER</span> <span class="nx">TABLE</span> <span class="nx">ci_sessions</span> <span class="nx">ALTER</span> <span class="nx">COLUMN</span> <span class="nx">id</span> <span class="nx">SET</span> <span class="nx">DATA</span> <span class="nx">TYPE</span> <span class="nx">varchar</span><span class="p">(</span><span class="mi">128</span><span class="p">);</span>
462</pre></div>
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