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425 <div class="section" id="running-via-the-cli">
426<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>
427<p>As well as calling an applications <a class="reference internal" href="controllers.html"><span class="doc">Controllers</span></a>
428via the URL in a browser they can also be loaded via the command-line
429interface (CLI).</p>
430<div class="contents topic" id="page-contents">
431<p class="topic-title first">Page Contents</p>
432<ul class="simple">
433<li><a class="reference internal" href="#running-via-the-cli" id="id1">Running via the CLI</a><ul>
434<li><a class="reference internal" href="#what-is-the-cli" id="id2">What is the CLI?</a></li>
435<li><a class="reference internal" href="#why-run-via-the-command-line" id="id3">Why run via the command-line?</a></li>
436<li><a class="reference internal" href="#let-s-try-it-hello-world" id="id4">Let’s try it: Hello World!</a></li>
437<li><a class="reference internal" href="#that-s-it" id="id5">That’s it!</a></li>
438</ul>
439</li>
440</ul>
441</div>
442<div class="section" id="what-is-the-cli">
443<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>
444<p>The command-line interface is a text-based method of interacting with
445computers. For more information, check the <a class="reference external" href="http://en.wikipedia.org/wiki/Command-line_interface">Wikipedia
446article</a>.</p>
447</div>
448<div class="section" id="why-run-via-the-command-line">
449<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>
450<p>There are many reasons for running CodeIgniter from the command-line,
451but they are not always obvious.</p>
452<ul class="simple">
453<li>Run your cron-jobs without needing to use <em>wget</em> or <em>curl</em></li>
454<li>Make your cron-jobs inaccessible from being loaded in the URL by
455checking 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>
456<li>Make interactive “tasks” that can do things like set permissions,
457prune cache folders, run backups, etc.</li>
458<li>Integrate with other applications in other languages. For example, a
459random C++ script could call one command and run code in your models!</li>
460</ul>
461</div>
462<div class="section" id="let-s-try-it-hello-world">
463<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>
464<p>Let’s create a simple controller so you can see it in action. Using your
465text editor, create a file called Tools.php, and put the following code
466in it:</p>
467<div class="highlight-ci"><div class="highlight"><pre><span></span><span class="o">&lt;?</span><span class="nx">php</span>
468<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>
469
470 <span class="k">public</span> <span class="k">function</span> <span class="nf">message</span><span class="p">(</span><span class="nv">$to</span> <span class="o">=</span> <span class="s1">&#39;World&#39;</span><span class="p">)</span>
471 <span class="p">{</span>
472 <span class="k">echo</span> <span class="s2">&quot;Hello </span><span class="si">{</span><span class="nv">$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>
473 <span class="p">}</span>
474<span class="p">}</span>
475</pre></div>
476</div>
477<p>Then save the file to your <em>application/controllers/</em> folder.</p>
478<p>Now normally you would visit the site using a URL similar to this:</p>
479<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>
480</pre></div>
481</div>
482<p>Instead, we are going to open the terminal in Mac/Linux or go to Run &gt; “cmd”
483in Windows and navigate to our CodeIgniter project.</p>
484<div class="highlight-bash"><div class="highlight"><pre><span></span>$ <span class="nb">cd</span> /path/to/project<span class="p">;</span>
485$ php index.php tools message
486</pre></div>
487</div>
488<p>If you did it right, you should see <em>Hello World!</em> printed.</p>
489<div class="highlight-bash"><div class="highlight"><pre><span></span>$ php index.php tools message <span class="s2">&quot;John Smith&quot;</span>
490</pre></div>
491</div>
492<p>Here we are passing it an argument in the same way that URL parameters
493work. “John Smith” is passed as an argument and the output is:</p>
494<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>
495</pre></div>
496</div>
497</div>
498<div class="section" id="that-s-it">
499<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>
500<p>That, in a nutshell, is all there is to know about controllers on the
501command line. Remember that this is just a normal controller, so routing
502and <code class="docutils literal"><span class="pre">_remap()</span></code> works fine.</p>
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