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<section id="troubleshooting">
<h1>Troubleshooting<a class="headerlink" href="#troubleshooting" title="Permalink to this headline"></a></h1>
<p>Here are some common installation problems, and suggested workarounds.</p>
<div class="contents local topic" id="contents">
<ul class="simple">
<li><p><a class="reference internal" href="#how-do-i-know-if-my-install-is-working" id="id1">How do I know if my install is working?</a></p></li>
<li><p><a class="reference internal" href="#i-have-to-include-index-php-in-my-url" id="id2">I have to include index.php in my URL</a></p></li>
<li><p><a class="reference internal" href="#only-the-default-page-loads" id="id3">Only the default page loads</a></p></li>
<li><p><a class="reference internal" href="#no-input-file-specified" id="id4">No input file specified</a></p></li>
<li><p><a class="reference internal" href="#my-app-works-fine-locally-but-not-on-the-production-server" id="id5">My app works fine locally but not on the production server</a></p></li>
<li><p><a class="reference internal" href="#the-tutorial-gives-404-errors-everywhere" id="id6">The tutorial gives 404 errors everywhere :(</a></p></li>
<li><p><a class="reference internal" href="#what-s-with-an-unhelpful-whoops-page" id="id7">Whats with an unhelpful “Whoops!” page?</a></p></li>
<li><p><a class="reference internal" href="#codeigniter-error-logs" id="id8">CodeIgniter Error Logs</a></p></li>
</ul>
</div>
<section id="how-do-i-know-if-my-install-is-working">
<h2><a class="toc-backref" href="#id1">How do I know if my install is working?</a><a class="headerlink" href="#how-do-i-know-if-my-install-is-working" title="Permalink to this headline"></a></h2>
<p>From the command line, at your project root:</p>
<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="go">php spark serve</span>
</pre></div>
</div>
<p><code class="docutils literal notranslate"><span class="pre">http://localhost:8080</span></code> in your browser should then show the default
welcome page:</p>
<p><img alt="CodeIgniter4 Welcome" src="../_images/welcome.png" /></p>
</section>
<section id="i-have-to-include-index-php-in-my-url">
<h2><a class="toc-backref" href="#id2">I have to include index.php in my URL</a><a class="headerlink" href="#i-have-to-include-index-php-in-my-url" title="Permalink to this headline"></a></h2>
<p>If a URL like <code class="docutils literal notranslate"><span class="pre">/mypage/find/apple</span></code> doesnt work, but the similar
URL <code class="docutils literal notranslate"><span class="pre">/index.php/mypage/find/apple</span></code> does, that sounds like your <strong>.htaccess</strong> rules
(for Apache) are not set up properly, or the <code class="docutils literal notranslate"><span class="pre">mod_rewrite</span></code> extension
in Apaches <strong>httpd.conf</strong> is commented out.
See <a class="reference internal" href="../general/urls.html#urls-remove-index-php"><span class="std std-ref">Removing the index.php file</span></a>.</p>
</section>
<section id="only-the-default-page-loads">
<h2><a class="toc-backref" href="#id3">Only the default page loads</a><a class="headerlink" href="#only-the-default-page-loads" title="Permalink to this headline"></a></h2>
<p>If you find that no matter what you put in your URL only your default
page is loading, it might be that your server does not support the
REQUEST_URI variable needed to serve search-engine friendly URLs. As a
first step, open your <strong>app/Config/App.php</strong> file and look for
the URI Protocol information. It will recommend that you try a couple of
alternate settings. If it still doesnt work after youve tried this
youll need to force CodeIgniter to add a question mark (<code class="docutils literal notranslate"><span class="pre">?</span></code>) to your URLs. To
do this open your <strong>app/Config/App.php</strong> file and change this:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o">&lt;?</span><span class="nx">php</span>
<span class="k">namespace</span> <span class="nx">Config</span><span class="p">;</span>
<span class="k">use</span> <span class="nx">CodeIgniter\Config\BaseConfig</span><span class="p">;</span>
<span class="k">class</span> <span class="nc">App</span> <span class="k">extends</span> <span class="nx">BaseConfig</span>
<span class="p">{</span>
<span class="c1">// ...</span>
<span class="k">public</span> <span class="nx">string</span> <span class="nv">$indexPage</span> <span class="o">=</span> <span class="s1">&#39;index.php&#39;</span><span class="p">;</span>
<span class="c1">// ...</span>
<span class="p">}</span>
</pre></div>
</div>
<p>To this:</p>
<div class="highlight-html+php notranslate"><div class="highlight"><pre><span></span><span class="o">&lt;?</span><span class="nx">php</span>
<span class="k">namespace</span> <span class="nx">Config</span><span class="p">;</span>
<span class="k">use</span> <span class="nx">CodeIgniter\Config\BaseConfig</span><span class="p">;</span>
<span class="k">class</span> <span class="nc">App</span> <span class="k">extends</span> <span class="nx">BaseConfig</span>
<span class="p">{</span>
<span class="c1">// ...</span>
<span class="k">public</span> <span class="nx">string</span> <span class="nv">$indexPage</span> <span class="o">=</span> <span class="s1">&#39;index.php?&#39;</span><span class="p">;</span>
<span class="c1">// ...</span>
<span class="p">}</span>
</pre></div>
</div>
</section>
<section id="no-input-file-specified">
<h2><a class="toc-backref" href="#id4">No input file specified</a><a class="headerlink" href="#no-input-file-specified" title="Permalink to this headline"></a></h2>
<p>If you see “No input file specified”, try to change the rewrite rule like the following (to add <code class="docutils literal notranslate"><span class="pre">?</span></code> after <code class="docutils literal notranslate"><span class="pre">index.php</span></code>):</p>
<div class="highlight-apache notranslate"><div class="highlight"><pre><span></span><span class="nb">RewriteRule</span><span class="w"> </span>^([\s\S]*)$<span class="w"> </span>index.php?/$1<span class="w"> </span>[L,NC,QSA]
</pre></div>
</div>
</section>
<section id="my-app-works-fine-locally-but-not-on-the-production-server">
<h2><a class="toc-backref" href="#id5">My app works fine locally but not on the production server</a><a class="headerlink" href="#my-app-works-fine-locally-but-not-on-the-production-server" title="Permalink to this headline"></a></h2>
<p>Make sure that the case of the folder and file names matches the code.</p>
<p>Many developers develop on case-insensitive file systems on Windows or macOS.
However, most server environments use case-sensitive file systems.</p>
<p>For example, when you have <strong>app/Controllers/Product.php</strong>, you must use
<code class="docutils literal notranslate"><span class="pre">Product</span></code> as the short classname, not <code class="docutils literal notranslate"><span class="pre">product</span></code>.</p>
<p>If the file name case is incorrect, the file is not found on the server.</p>
</section>
<section id="the-tutorial-gives-404-errors-everywhere">
<h2><a class="toc-backref" href="#id6">The tutorial gives 404 errors everywhere :(</a><a class="headerlink" href="#the-tutorial-gives-404-errors-everywhere" title="Permalink to this headline"></a></h2>
<p>You cant follow the tutorial using PHPs built-in web server.
It doesnt process the <strong>.htaccess</strong> file needed to route
requests properly.</p>
<p>The solution: use Apache to serve your site, or else the built-in
CodeIgniter equivalent, <code class="docutils literal notranslate"><span class="pre">php</span> <span class="pre">spark</span> <span class="pre">serve</span></code> from your project root.</p>
</section>
<section id="what-s-with-an-unhelpful-whoops-page">
<h2><a class="toc-backref" href="#id7">Whats with an unhelpful “Whoops!” page?</a><a class="headerlink" href="#what-s-with-an-unhelpful-whoops-page" title="Permalink to this headline"></a></h2>
<p>You find that your app is displaying a page with “Whoops!” and
then the text line “We seem to have hit a snag. Please try again later…”.</p>
<p>That is a sign that you are in production mode and have hit an
unrecoverable error, which we dont want to show to the viewer of
the webapp, for better security.</p>
<p>You can see the error in the log file. See <a class="reference internal" href="#codeigniter-error-logs">CodeIgniter Error Logs</a> below.</p>
<p>If you reach this page while developing you should change your environment to
“development” (in <strong>.env</strong>). See <a class="reference internal" href="../tutorial/index.html#setting-development-mode"><span class="std std-ref">Setting Development Mode</span></a> for more details.
After that, reload the page. You will see the error and the back trace.</p>
</section>
<section id="codeigniter-error-logs">
<h2><a class="toc-backref" href="#id8">CodeIgniter Error Logs</a><a class="headerlink" href="#codeigniter-error-logs" title="Permalink to this headline"></a></h2>
<p>CodeIgniter logs error messages, according to the settings in <strong>app/Config/Logger.php</strong>.</p>
<p>You can adjust the error threshold to see more or fewer messages. See <a class="reference internal" href="../general/logging.html#logging-configuration"><span class="std std-ref">Logging</span></a> for details.</p>
<p>The default configuration has daily log files stored in <strong>writable/logs</strong>.
It would be a good idea to check them if things arent working the way you expect!</p>
</section>
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