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  <div class="section" id="upgrading-from-3-0-5-to-3-0-6">
<h1>Upgrading from 3.0.5 to 3.0.6<a class="headerlink" href="#upgrading-from-3-0-5-to-3-0-6" 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 all files and directories in your <em>system/</em> directory.</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">If you have any custom developed files in these directories,
please make copies of them first.</p>
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<div class="section" id="step-2-update-your-index-php-file-optional">
<h2>Step 2: Update your index.php file (optional)<a class="headerlink" href="#step-2-update-your-index-php-file-optional" title="Permalink to this headline">¶</a></h2>
<p>We&#8217;ve made some tweaks to the index.php file, mostly related to proper
usage of directory separators (i.e. use the <tt class="docutils literal"><span class="pre">DIRECTORY_SEPARATOR</span></tt>
constant instead of a hard coded forward slash &#8220;/&#8221;).</p>
<p>Nothing will break if you skip this step, but if you&#8217;re running Windows
or just want to be up to date with every change - we do recommend that
you update your index.php file.</p>
<p><em>Tip: Just copy the ``ENVIRONMENT``, ``$system_path``, ``$application_folder``
and ``$view_folder`` declarations from the old file and put them into the
new one, replacing the defaults.</em></p>
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<div class="section" id="step-3-remove-prep-for-form-usage-deprecation">
<h2>Step 3: Remove &#8216;prep_for_form&#8217; usage (deprecation)<a class="headerlink" href="#step-3-remove-prep-for-form-usage-deprecation" title="Permalink to this headline">¶</a></h2>
<p>The <a class="reference internal" href="../libraries/form_validation.html"><em>Form Validation Library</em></a> has a
<tt class="docutils literal"><span class="pre">prep_for_form()</span></tt> method, which is/can also be used as a rule in
<tt class="docutils literal"><span class="pre">set_rules()</span></tt> to automatically perform HTML encoding on input data.</p>
<p>Automatically encoding input (instead of output) data is a bad practice in
the first place, and CodeIgniter and PHP itself offer other alternatives
to this method anyway.
For example, <a class="reference internal" href="../helpers/form_helper.html"><em>Form Helper</em></a> functions will
automatically perform HTML escaping when necessary.</p>
<p>Therefore, the <em>prep_for_form</em> method/rule is pretty much useless and is now
deprecated and scheduled for removal in 3.1+.</p>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">The method is still available, but you&#8217;re strongly encouraged to
remove its usage sooner rather than later.</p>
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