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| <h1>Running via the CLI</h1> |
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| <p> |
| As well as calling an applications <a href="./controllers.html">Controllers</a> via the URL in a browser they can also be loaded via the command-line interface (CLI). |
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| <ul> |
| <li><a href="#what">What is the CLI?</a></li> |
| <li><a href="#why">Why use this method?</a></li> |
| <li><a href="#how">How does it work?</a></li> |
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| <a name="what"></a> |
| <h2>What is the CLI?</h2> |
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| <p><dfn>The command-line interface is a text-based method of interacting with computers that looks like what most people remember as DOS.</dfn></p> |
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| <a name="why"></a> |
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| <h2>Why run via the command-line?</h2> |
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| <p> |
| There are many reasons for running CodeIgniter from the command-line, but they are not always obvious.</p> |
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| <ul> |
| <li>Run your cron-jobs without needing to use wget or curl</li> |
| <li>Make your cron-jobs inaccessible from being loaded in the URL by checking for <kbd>IS_CLI</kbd></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> |
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| <a name="how"></a> |
| <h2>Let's try it: Hello World!</h2> |
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| <p>Let's create a simple controller so you can see it in action. Using your text editor, create a file called <dfn>tools.php</dfn>, and put the following code in it:</p> |
| |
| <textarea class="textarea" style="width:100%" cols="50" rows="10"> |
| <?php |
| class Tools extends CI_Controller { |
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| public function message($to = 'World') |
| { |
| echo "Hello {$to}!".PHP_EOL; |
| } |
| } |
| ?> |
| </textarea> |
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| <p>Then save the file to your <dfn>application/controllers/</dfn> folder.</p> |
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| <p>Now normally you would visit the your site using a URL similar to this:</p> |
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| <code>example.com/index.php/<var>tools</var>/<var>message</var>/<var>to</var></code> |
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| <p>Instead, we are going to open Terminal in Mac/Lunix or go to Run > "cmd" in Windows and navigate to our CodeIgniter project.</p> |
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| <blockquote> |
| $ cd /path/to/project;<br/> |
| $ php index.php tools message |
| </blockquote> |
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| <p>If you did it right, you should see <samp>Hello World!</samp>.</p> |
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| <blockquote> |
| $ php index.php tools message "John Smith" |
| </blockquote> |
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| <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: <samp>Hello John Smith!</samp>.</p> |
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| <h2>That's it!</h2> |
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| <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 _remap works fine.</p> |
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