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  <div class="section" id="running-via-the-cli">
<h1><a class="toc-backref" href="#id1">Running via the CLI</a><a class="headerlink" href="#running-via-the-cli" title="Permalink to this headline">¶</a></h1>
<p>As well as calling an applications <a class="reference internal" href="controllers.html"><span class="doc">Controllers</span></a>
via the URL in a browser they can also be loaded via the command-line
interface (CLI).</p>
<div class="contents topic" id="page-contents">
<p class="topic-title first">Page Contents</p>
<ul class="simple">
<li><a class="reference internal" href="#running-via-the-cli" id="id1">Running via the CLI</a><ul>
<li><a class="reference internal" href="#what-is-the-cli" id="id2">What is the CLI?</a></li>
<li><a class="reference internal" href="#why-run-via-the-command-line" id="id3">Why run via the command-line?</a></li>
<li><a class="reference internal" href="#let-s-try-it-hello-world" id="id4">Let’s try it: Hello World!</a></li>
<li><a class="reference internal" href="#that-s-it" id="id5">That’s it!</a></li>
</ul>
</li>
</ul>
</div>
<div class="section" id="what-is-the-cli">
<h2><a class="toc-backref" href="#id2">What is the CLI?</a><a class="headerlink" href="#what-is-the-cli" title="Permalink to this headline">¶</a></h2>
<p>The command-line interface is a text-based method of interacting with
computers. For more information, check the <a class="reference external" href="http://en.wikipedia.org/wiki/Command-line_interface">Wikipedia
article</a>.</p>
</div>
<div class="section" id="why-run-via-the-command-line">
<h2><a class="toc-backref" href="#id3">Why run via the command-line?</a><a class="headerlink" href="#why-run-via-the-command-line" title="Permalink to this headline">¶</a></h2>
<p>There are many reasons for running CodeIgniter from the command-line,
but they are not always obvious.</p>
<ul class="simple">
<li>Run your cron-jobs without needing to use <em>wget</em> or <em>curl</em></li>
<li>Make your cron-jobs inaccessible from being loaded in the URL by
checking the return value of <a class="reference internal" href="common_functions.html#is_cli" title="is_cli"><code class="xref php php-func docutils literal"><span class="pre">is_cli()</span></code></a>.</li>
<li>Make interactive “tasks” that can do things like set permissions,
prune cache folders, run backups, etc.</li>
<li>Integrate with other applications in other languages. For example, a
random C++ script could call one command and run code in your models!</li>
</ul>
</div>
<div class="section" id="let-s-try-it-hello-world">
<h2><a class="toc-backref" href="#id4">Let’s try it: Hello World!</a><a class="headerlink" href="#let-s-try-it-hello-world" title="Permalink to this headline">¶</a></h2>
<p>Let’s create a simple controller so you can see it in action. Using your
text editor, create a file called Tools.php, and put the following code
in it:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o">&lt;?</span><span class="nx">php</span>
<span class="k">class</span> <span class="nc">Tools</span> <span class="k">extends</span> <span class="nx">CI_Controller</span> <span class="p">{</span>

<span class="k">public</span> <span class="k">function</span> <span class="nf">message</span><span class="p">(</span><span class="nv">$to</span> <span class="o">=</span> <span class="s1">&#39;World&#39;</span><span class="p">)</span>
        <span class="p">{</span>
                <span class="k">echo</span> <span class="s2">&quot;Hello </span><span class="si">{</span><span class="nv">$to</span><span class="si">}</span><span class="s2">!&quot;</span><span class="o">.</span><span class="nx">PHP_EOL</span><span class="p">;</span>
        <span class="p">}</span>
<span class="p">}</span>
</pre></div>
</div>
<p>Then save the file to your <em>application/controllers/</em> folder.</p>
<p>Now normally you would visit the site using a URL similar to this:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">example</span><span class="o">.</span><span class="nx">com</span><span class="o">/</span><span class="nx">index</span><span class="o">.</span><span class="nx">php</span><span class="o">/</span><span class="nx">tools</span><span class="o">/</span><span class="nx">message</span><span class="o">/</span><span class="nx">to</span>
</pre></div>
</div>
<p>Instead, we are going to open the terminal in Mac/Linux or go to Run &gt; “cmd”
in Windows and navigate to our CodeIgniter project.</p>
<div class="highlight-bash"><div class="highlight"><pre><span></span>$ <span class="nb">cd</span> /path/to/project<span class="p">;</span>
$ php index.php tools message
</pre></div>
</div>
<p>If you did it right, you should see <em>Hello World!</em> printed.</p>
<div class="highlight-bash"><div class="highlight"><pre><span></span>$ php index.php tools message <span class="s2">&quot;John Smith&quot;</span>
</pre></div>
</div>
<p>Here we are passing it a argument in the same way that URL parameters
work. “John Smith” is passed as a argument and output is:</p>
<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="nx">Hello</span> <span class="nx">John</span> <span class="nx">Smith</span><span class="o">!</span>
</pre></div>
</div>
</div>
<div class="section" id="that-s-it">
<h2><a class="toc-backref" href="#id5">That’s it!</a><a class="headerlink" href="#that-s-it" title="Permalink to this headline">¶</a></h2>
<p>That, in a nutshell, is all there is to know about controllers on the
command line. Remember that this is just a normal controller, so routing
and <code class="docutils literal"><span class="pre">_remap()</span></code> works fine.</p>
</div>
</div>

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