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CodeIgniter4/installation/upgrade_421.html
kenjis 8923a7d2ee Update User Guide
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<section id="upgrading-from-4-2-0-to-4-2-1">
<h1>Upgrading from 4.2.0 to 4.2.1<a class="headerlink" href="#upgrading-from-4-2-0-to-4-2-1" title="Permalink to this headline"></a></h1>
<p>Please refer to the upgrade instructions corresponding to your installation method.</p>
<ul class="simple">
<li><p><a class="reference internal" href="installing_composer.html#app-starter-upgrading"><span class="std std-ref">Composer Installation App Starter Upgrading</span></a></p></li>
<li><p><a class="reference internal" href="installing_composer.html#adding-codeigniter4-upgrading"><span class="std std-ref">Composer Installation Adding CodeIgniter4 to an Existing Project Upgrading</span></a></p></li>
<li><p><a class="reference internal" href="installing_manual.html#installing-manual-upgrading"><span class="std std-ref">Manual Installation Upgrading</span></a></p></li>
</ul>
<div class="contents local topic" id="contents">
<ul class="simple">
<li><p><a class="reference internal" href="#mandatory-file-changes" id="id1">Mandatory File Changes</a></p>
<ul>
<li><p><a class="reference internal" href="#app-config-mimes-php" id="id2">app/Config/Mimes.php</a></p></li>
</ul>
</li>
<li><p><a class="reference internal" href="#breaking-changes" id="id3">Breaking Changes</a></p>
<ul>
<li><p><a class="reference internal" href="#get-cookie" id="id4">get_cookie()</a></p></li>
</ul>
</li>
<li><p><a class="reference internal" href="#breaking-enhancements" id="id5">Breaking Enhancements</a></p></li>
<li><p><a class="reference internal" href="#project-files" id="id6">Project Files</a></p>
<ul>
<li><p><a class="reference internal" href="#content-changes" id="id7">Content Changes</a></p></li>
<li><p><a class="reference internal" href="#all-changes" id="id8">All Changes</a></p></li>
</ul>
</li>
</ul>
</div>
<section id="mandatory-file-changes">
<h2><a class="toc-backref" href="#id1">Mandatory File Changes</a><a class="headerlink" href="#mandatory-file-changes" title="Permalink to this headline"></a></h2>
<section id="app-config-mimes-php">
<h3><a class="toc-backref" href="#id2">app/Config/Mimes.php</a><a class="headerlink" href="#app-config-mimes-php" title="Permalink to this headline"></a></h3>
<ul class="simple">
<li><p>The mapping of file extensions to MIME types in <strong>app/Config/Mimes.php</strong> was updated to fix a bug. Also, the logic of <code class="docutils literal notranslate"><span class="pre">Mimes::getExtensionFromType()</span></code> was changed.</p></li>
</ul>
</section>
</section>
<section id="breaking-changes">
<h2><a class="toc-backref" href="#id3">Breaking Changes</a><a class="headerlink" href="#breaking-changes" title="Permalink to this headline"></a></h2>
<section id="get-cookie">
<span id="upgrade-421-get-cookie"></span><h3><a class="toc-backref" href="#id4">get_cookie()</a><a class="headerlink" href="#get-cookie" title="Permalink to this headline"></a></h3>
<p>If there is a cookie with a prefixed name and a cookie with the same name without a prefix, the previous <code class="docutils literal notranslate"><span class="pre">get_cookie()</span></code> had the tricky behavior of returning the cookie without the prefix.</p>
<p>For example, when <code class="docutils literal notranslate"><span class="pre">Config\Cookie::$prefix</span></code> is <code class="docutils literal notranslate"><span class="pre">prefix_</span></code>, there are two cookies, <code class="docutils literal notranslate"><span class="pre">test</span></code> and <code class="docutils literal notranslate"><span class="pre">prefix_test</span></code>:</p>
<div class="highlight-php notranslate"><div class="highlight"><pre><span></span><span class="x">$_COOKIES = [</span>
<span class="x"> &#39;test&#39; =&gt; &#39;Non CI Cookie&#39;,</span>
<span class="x"> &#39;prefix_test&#39; =&gt; &#39;CI Cookie&#39;,</span>
<span class="x">];</span>
</pre></div>
</div>
<p>Previously, <code class="docutils literal notranslate"><span class="pre">get_cookie()</span></code> returns the following:</p>
<div class="highlight-php notranslate"><div class="highlight"><pre><span></span><span class="x">get_cookie(&#39;test&#39;); // returns &quot;Non CI Cookie&quot;</span>
<span class="x">get_cookie(&#39;prefix_test&#39;); // returns &quot;CI Cookie&quot;</span>
</pre></div>
</div>
<p>Now the behavior has been fixed as a bug, and has been changed like the following.</p>
<div class="highlight-php notranslate"><div class="highlight"><pre><span></span><span class="x">get_cookie(&#39;test&#39;); // returns &quot;CI Cookie&quot;</span>
<span class="x">get_cookie(&#39;prefix_test&#39;); // returns null</span>
<span class="x">get_cookie(&#39;test&#39;, false, null); // returns &quot;Non CI Cookie&quot;</span>
</pre></div>
</div>
<p>If you depend on the previous behavior, you need to change your code.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>In the example above, if there is only one cookie <code class="docutils literal notranslate"><span class="pre">prefix_test</span></code>,
the previous <code class="docutils literal notranslate"><span class="pre">get_cookie('test')</span></code> also returns <code class="docutils literal notranslate"><span class="pre">&quot;CI</span> <span class="pre">Cookie&quot;</span></code>.</p>
</div>
</section>
</section>
<section id="breaking-enhancements">
<h2><a class="toc-backref" href="#id5">Breaking Enhancements</a><a class="headerlink" href="#breaking-enhancements" title="Permalink to this headline"></a></h2>
</section>
<section id="project-files">
<h2><a class="toc-backref" href="#id6">Project Files</a><a class="headerlink" href="#project-files" title="Permalink to this headline"></a></h2>
<p>Numerous files in the <strong>project space</strong> (root, app, public, writable) received updates. Due to
these files being outside of the <strong>system</strong> scope they will not be changed without your intervention.
There are some third-party CodeIgniter modules available to assist with merging changes to
the project space: <a class="reference external" href="https://packagist.org/explore/?query=codeigniter4%20updates">Explore on Packagist</a>.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>Except in very rare cases for bug fixes, no changes made to files for the project space
will break your application. All changes noted here are optional until the next major version,
and any mandatory changes will be covered in the sections above.</p>
</div>
<section id="content-changes">
<h3><a class="toc-backref" href="#id7">Content Changes</a><a class="headerlink" href="#content-changes" title="Permalink to this headline"></a></h3>
</section>
<section id="all-changes">
<h3><a class="toc-backref" href="#id8">All Changes</a><a class="headerlink" href="#all-changes" title="Permalink to this headline"></a></h3>
<p>This is a list of all files in the <strong>project space</strong> that received changes;
many will be simple comments or formatting that have no effect on the runtime:</p>
<ul class="simple">
<li><p>app/Config/Mimes.php</p></li>
</ul>
</section>
</section>
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